Rockwell Automation Redundant I/O System User Manual

Redundant I/O System

Catalog Numbers 1715-AENTR, 1715-IB16D, 1715-OB8DE,
1715-IF16, 1715-OF8I

User Manual

Original Instructions

Redundant I/O System User Manual

Important User Information

Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize
themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.

Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to
be carried out by suitably trained personnel in accordance with applicable code of practice.

If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use
or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software
described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is
prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

WA RN I NG : Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.

IMPORTANT Identifies information that is critical for successful application and understanding of the product.

Labels may also be on or inside the equipment to provide specific precautions.

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.

ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

2 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Table of Contents

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

About This Publication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Required Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Download Firmware, AOP, EDS, and Other Files . . . . . . . . . . . . . . . . . . . 11

Summary of Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chapter 1

Redundancy System Overview Redundant 1715 Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1715 I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1715 I/O Modules in SIL 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . 14

System Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Termination Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Base Unit Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1715-AENTR Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Module Positioning in the 1715 Redundant I/O System . . . . . . . . . . 15

Layout the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

System Context . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Simplex Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Duplex Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Mixed Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Bus Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Switchover Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Obtaining a New IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Ethernet Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Communication on the EtherNet/IP Network . . . . . . . . . . . . . . . . . . 28

System Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Input / Output Traffic Prioritization. . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

RPI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Connection and Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Timestamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Chapter 2

Installation Instructions Environment and Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

European Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . . . . 33

Multi-point Network Communication Connections. . . . . . . . . . . . . 34

Field-side Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Removal and Insertion Under Power (RIUP) Fuses. . . . . . . . . . . . . . 34

North American Hazardous Location Approval . . . . . . . . . . . . . . . . . 35

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 3

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Ensure that Warranty is Not Compromised . . . . . . . . . . . . . . . . . . . . 36

Graphical Representation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Spacing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

System Hardware Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

1715-AENTR Adapter Redundant Pair . . . . . . . . . . . . . . . . . . . . . . . . . . 38

1715 Digital and Analog I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . 39

1715-A2A Adapter Base Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

1715-A3IO I/O Base Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

I/O Termination Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

1715-C2 Expansion Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

1715-N2T and 1715-N2S Slot Filler Covers . . . . . . . . . . . . . . . . . . . . . . . 50

Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Cooling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Heating Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Specify an Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

System Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Module Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Base Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Install Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Step 1: Enclosure DIN Rail Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Step 2: Build the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Product Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

DIN Rail Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

DIN Rail Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Component Size and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Install the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Install the Adapter Base Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Install the I/O Base Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Install Termination Assembly to I/O Base Unit. . . . . . . . . . . . . . . . . . . . . 64

Mount Termination Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Mount I/O Expansion Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Cable Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Expansion Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Install Expansion Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Wire the Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Connect the 24V DC System Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Wire the Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Connect Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Recommended Circuits for Digital Inputs. . . . . . . . . . . . . . . . . . . . . . 75

Recommended Circuits for Digital Outputs . . . . . . . . . . . . . . . . . . . . 80

1715-OB8DE Digital Output Module FBD. . . . . . . . . . . . . . . . . . . . . . . 82

Recommended Circuits for Analog Inputs . . . . . . . . . . . . . . . . . . . . . 86

Recommended Wiring for Analog Output Modules . . . . . . . . . . . . . 94

Connect the Adapter to the Ethernet Network . . . . . . . . . . . . . . . . . . . . . 96

Module Keying. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Verify Coding Pegs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Electronic Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

4 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

More Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Install the Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Assign an IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Step 1: Assign an IP Address on the BOOTP/DHCP Server . . . . . . 105

Step 2: Configure the Module with RSLinx Classic Software . . . . 108

Install the I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Install Slot Filler Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Remove Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Chapter 3

Security Protected Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Web-Server Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Enable / Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Chapter 4

Digital I/O Operation 1715 Digital Module Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

1715-IB16D Digital Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

1715-OB8DE Digital Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Common Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Determining Input Module Compatibility. . . . . . . . . . . . . . . . . . . . . . . . 119

Termination Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Determining Output Module Compatibility . . . . . . . . . . . . . . . . . . . . . . 120

Termination Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Using Features Common to 1715 Standard Digital I/O Modules . . . . . 120

Removal and Insertion Under Power (RIUP) . . . . . . . . . . . . . . . . . . 120

Module Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Fully Software Configurable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Module Inhibiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Status Indicator Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Features Specific to 1715-IB16D Digital Input Modules . . . . . . . . . . . . . 122

Data Transfer on Either Cyclic Time or Change of State . . . . . . . . 122

Set RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Enable Change of State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Field-side Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Features Specific to 1715-OB8DE Digital Output Modules . . . . . . . . . . 124

Field Power Status Integers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Field Fault Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Configurable Point-level Output Fault States . . . . . . . . . . . . . . . . . . 127

Output Data Echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Fusing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Diagnostic Latch Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Shutdown State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Energize-on-communication-failure . . . . . . . . . . . . . . . . . . . . . . . . . 131

De-energize-to-trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Disable Line Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Fault and Status Reporting between Input Modules

and Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 5

Fault and Status Reporting between Output Modules

and Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Chapter 5

Using 1715 Analog I/O
Module Features

1715 Analog Module Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

1715-IF16 Analog Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

1715-OF8I Analog Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Features Common to All

Analog I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Removal and Insertion Under Power (RIUP) . . . . . . . . . . . . . . . . . . 137

Module Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Fully Software Configurable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Status Indicator Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Module Inhibiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Scaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Online Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Offline Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Shutdown Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Ready Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Run Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Shutdown States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

HART Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Configuration of HART Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Precautions for HART in a Safety System . . . . . . . . . . . . . . . . . . . . . 142

Configure HART for Field Device Monitoring . . . . . . . . . . . . . . . . . 142

AB:1715_ChCHART_Struc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

HART Pass-Through. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Using HART Pass-Through . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

HART Pass-Through Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Precautions for HART Pass-Through in a Safety System . . . . . . . . 147

Installing the 1715-DTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Updating the Asset Management System DTM Catalogue . . . . . . 149

Enable HART Pass-Through in the Controller . . . . . . . . . . . . . . . . . 150

Using Factory Talk Asset Center with Analog Modules. . . . . . . . . . 150

1715-DTM Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

1715-DTM HART Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Chapter 6

Configure the Redundant I/O
System

6 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Install the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Install the Add-on Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Product Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Installation of product, this is achieved using the PCDC Website 158

EDS Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Create the Project in RSLogix 5000 or Studio 5000 Logix Designer. . 160

Step 1: Create the New Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Step 2: Configure the Controller in the Project. . . . . . . . . . . . . . . . . 162

Step 3: Add a 1756-EN2TR Module to the Project . . . . . . . . . . . . . . . 163

Add the 1715-AENTR Adapter to the I/O Configuration Tree . . . . . . . . 165

Step 1: Configure the Adapter for the EtherNet/IP Network. . . . . 165

Options for Setting the IP Addresses of 1715-AENTR Modules . . . 165

Ethernet Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Step 2: Add the 1715-AENTR Adapter to the Project . . . . . . . . . . . . . 166

Obtaining System Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

1715-IB16D Digital Input Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Add the Digital Input Module to the Project . . . . . . . . . . . . . . . . . . . 177

Step 1: Add the Digital Input Module in Duplex Mode . . . . . . . . . . 177

Step 2: Add the Digital Input Module in Simplex Mode . . . . . . . . . 182

1715-OB8DE Digital Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Step 1: Add the Digital Output Module in Duplex Mode. . . . . . . . . 185

Step 2: Add the Digital Output Module in Simplex Mode . . . . . . . 187

1715-IF16 Analog Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Add the Analog Input Module to the Project . . . . . . . . . . . . . . . . . . . 189

Step 1: Add the Analog Input Module in Duplex Mode . . . . . . . . . . 189

Step 2: Add the Analog Input Module in Simplex Mode . . . . . . . . . 192

1715-OF8I Analog Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Add the Analog Output Module to the project. . . . . . . . . . . . . . . . . . 193

Step 1: Add the Analog Output Module in Duplex Mode. . . . . . . . . 193

Step 2: Add the Analog Output Module in Simplex Mode . . . . . . . 198

1715 Redundant I/O System in
SIL 2 Safety Applications

Chapter 7

SIL 2 Safety Application Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . 201

1715 I/O Modules in SIL 2 Safety Applications . . . . . . . . . . . . . . . . . . . . . 202

Typical Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Internal Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Requirements for Using 1715 I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . 207

Energize-to-action Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Requirements for ControlLogix-based SIL 2 Applications . . . . . . . . . . 208

Add-On Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Connection Reaction Time Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Using the 1715 Adapter in SIL 2 Applications . . . . . . . . . . . . . . . . . . . . . . 208

Reaction to Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Using 1715 I/O Modules in SIL 2 Applications . . . . . . . . . . . . . . . . . . . . . 209

Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Considerations for Sensor and Actuator Configurations . . . . . . . . . . . 212

Configure SIL 2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Enable SIL 2 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Specify the Connection Reaction Time Limit and Requested Packet

Interval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Set Safe State Values for Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

Check SIL 2 Reset Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

View Module Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Diagnostic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Reaction Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

System Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 7

Logix System Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Configuring the SIL 2 Task Period and Watchdog . . . . . . . . . . . . . . . . . 218

SIL Task/Program Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

Configuring the Output Module Program/Fault Actions. . . . . . . . 219

Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

Chapter 8

Using SIL 2 Add-On Instructions
with 1715 Redundant I/O Modules

SIL 2 Add-On Instructions Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

SIL 2 Check Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

Add-On Instruction Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Add-On Instruction Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

Download and Import the Add-On Instructions. . . . . . . . . . . . . . . . . . . 227

Import Add-On Instructions to Upgraded Projects. . . . . . . . . . . . . 227

Create a Periodic Task for SIL 2 Safety Functions . . . . . . . . . . . . . . . . . 228

1715 SIL 2 Periodic Task ‘Period’ Configuration . . . . . . . . . . . . . . . . 228

Configure an Input Module Add-On Instruction . . . . . . . . . . . . . . . . . . 230

Configure an Output Module Add-On Instruction. . . . . . . . . . . . . . . . . 233

Add-On Instruction Scan Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Safety Reaction Time Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Using the Add-On Instruction Data Tags in an Application Program 237

Performing a SIL 2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Chapter 9

Redundant I/O System

Diagnostic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

Diagnostics

Appendix A

Status Indicators Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

System Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Module Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Channel Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

Field Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

User Application Fault Indications and Logging . . . . . . . . . . . . . . . 246

Troubleshooting Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

1715 Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

1715 Digital Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

1715 Digital Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

1715 Analog Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

1715 Analog Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

Appendix B

1715-IB16D Digital Input Module
Diagnostics

8 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Threshold Values for Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Threshold Diagnostics Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Calculate Threshold and Resistor Values . . . . . . . . . . . . . . . . . . . . . . . . . 261

Calculate the Voltage for Off/On Conditions for Threshold Values. .

261

Calculate On/Off Condition for Resistor Values. . . . . . . . . . . . . . . . 265

Calibration Drift Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

Appendix C

Reconfigure a Module Online Use Ladder Logic to Reconfigure an I/O Module . . . . . . . . . . . . . . . . . . 269

Reconfigure a Module Via Studio 5000 Logix Designer Application.

269

Reconfigure a Module Via Ladder Logic. . . . . . . . . . . . . . . . . . . . . . . 270

Appendix D

PFD and PFH Calculations for a
SIL 2 System

About PFD and PFH Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Determine Which Values to Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Calculations for 1715 I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

PFD Calculations with 24-hour MTTR . . . . . . . . . . . . . . . . . . . . . . . . 274

Communications Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

Appendix E

SIL 2 Applications Checklist 1715 I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

Appendix F

I/O Tag Definitions 1715-AENTR Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

1715-IB16D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

1715-OB8DE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282

1715-IF16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284

1715-OF8I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

Appendix G

History of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 9

10 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Preface

About This Publication

Before You Begin

This manual explains how to install and configure the 1715 Redundant I/O
System. This redundant, modular system is designed to work with a
ControlLogix® Enhanced Redundancy System. This system provides fault
tolerant I/O and redundancy for use in critical process applications.

This manual is intended for the following individuals, who:

• Understand how to configure and use a ControlLogix System, and a
ControlLogix Enhanced Redundancy System

• Understand how to configure remote devices on an Ethernet/IP
network.

Before you begin using your 1715 Redundant I/O System, verify that you have
the software that is required to install and configure your system.

Required Software

This list identifies the minimum software versions that are required to use
your 1715 Redundant I/O System:

• Either RSLogix 5000® or Studio 5000® software

• RSLogix 5000 programming software, version 20
Non-SIL 2 applications using revision 2.x of 1715 can use version 19

• RSLogix 5000 requires Microsoft Windows Vista; Microsoft Windows
7, 32- and 64-bit; and Microsoft Windows 2003 Server operating
systems

• Studio 5000 environment version 21 or later

• Studio 5000 requires Microsoft Windows Vista; Microsoft Windows 7,
32- and 64-bit; and Microsoft Windows 2003 Server operating systems

• ControlFLASH™ software version 13.00.00 or later

• Adapter Add-on Profile at rok.auto/pcdc

• I/O Modules Add-on Profile at rok.auto/pcdc

• Add-on Instructions at rok.auto/pcdc

.

.

.

Download Firmware, AOP, EDS, and Other Files

Summary of Changes

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 11

ATTENTION: ControlLogix L7 controllers are certified in RSLogix 5000
version 20 or later for SIL 2 operations. See the latest certifications for
software and firmware at rok.auto/certifications
at http://www.tuvasi.com

Download firmware, associated files (such as AOP, EDS, and DTM), and access
product release notes from the Product Compatibility and Download Center at

rok.auto/pcdc

This publication contains the following new or updated information. This list
includes substantive updates only and is not intended to reflect all changes.

.

for SIL 2 certification listings.

. See the TÜV website

Top i c Page

PFD Calculations with

Applied latest publication template

24-hour MTTR 274

Additional Resources

These documents contain additional information concerning related products
from Rockwell Automation.

Resource Description

1715 Redundant I/O System Technical Specifications, publication 1715-TD001 Provides technical specifications for components of the 1715 Redundant I/O System.

Describes how you can use EtherNet/IP modules with your Logix 5000™ controller and

EtherNet/IP Network Configuration User Manual, publication ENET-UM001

ControlLogix Enhanced Redundancy System, publication 1756-UM535
ControlLogix Digital I/O Modules User Manual, publication 1756-UM058 Describes how to install, configure, and troubleshoot ControlLogix digital I/O modules.
ControlLogix Analog I/O Modules User Manual, publication 1756-UM009
Using ControlLogix in SIL 2 Applications Safety Reference Manual,

publication 1756-RM001

Safety Guidelines for the Application, Installation, and Maintenance of
Solid-state Control, publication SGI-1.1

Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1
Product Certifications website, rok.auto/certifications

. Provides declarations of conformity, certificates, and other certification details.

You can view or download publications at rok.auto/literature

communicate with various devices on the Ethernet network.

Provides design and configuration information for a ControlLogix Redundancy System.

Describes how to install, configure, and troubleshoot ControlLogix analog I/O modules.

Describes the guidelines for using ControlLogix controllers in a SIL 2 safety application.

Designed to harmonize with NEMA Standards Publication No. ICS 1.1-1987 and provides
general guidelines for the application, installation, and maintenance of solid-state control in
the form of individual devices or packaged assemblies incorporating solid-state
components.

Provides general guidelines for installing a Rockwell Automation industrial system.

.

12 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 1

Redundancy System Overview

The 1715 Redundant I/O System lets a ControlLogix® controller communicate
to a remote, redundant I/O chassis by using EtherNet/IP. The 1715 Redundant
I/O system provides fault tolerance and redundancy for critical processes by
using a redundant adapter pair and multiple I/O modules that have
diagnostics and are easily replaceable.

The modular architecture lets you build and adapt a system to suit the specific
needs of an installation. The architecture lets you choose from different levels
of adapter and I/O fault protection.

The 1715 Redundant I/O System consists of a two-slot adapter base unit that
houses a redundant adapter pair. The adapter base unit is connected to up to
eight I/O base units, which can hold up to 24 I/O modules (three I/O modules
per I/O base unit) when connected together. The I/O modules can be
configured in any combination of simplex or duplex pairs, depending on the
mode of operation needed. The I/O base units can be connected directly to the
adapter base unit and other I/O base units, or through expansion cables.

The 1715 Redundant I/O System is a modular system in which the adapter and
I/O base units snap together by using mating connectors and retaining clips to
form the backplane. One module in a duplex pair can be removed and replaced
without system interruption. The base units, via termination assemblies,
provide the interconnections for power, adapter, and I/O data. Once
connected, the base units form the single mechanical assembly or backplane.

Redundant 1715 Adapters

The redundant, partnered adapters monitor inputs/outputs and diagnostics
for the I/O in the remote chassis. If a fault occurs in one of the redundant
adapters, an IP address switchover occurs and I/O monitoring and
communication to the ControlLogix System continues without interruption.
This switchover is transparent to the user. Status indicators and status
information available to the ControlLogix application enables you to
determine the status of each 1715-AENTR adapter.

1715 I/O Modules

Both digital and analog I/O modules are available for use in this system,
depending on your needs. I/O modules can be used singly or in pairs,
providing configuration in either Simplex or Duplex modes.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 13

Chapter 1 Redundancy System Overview

Table 1 lists the 1715 modules that can be used in this system.

.

Table 1 - Modules Available for the 1715 Redundant I/O System

Cat. No. Description

1715-AENTR x 2 A pair of Ethernet adapters
1715-IB16D A 16-channel digital input module
1715-OB8DE An 8-channel digital output module
1715-IF16 A 16-channel analog input module
1715-OF8I An 8-channel analog output module

1715 I/O Modules in SIL 2 Applications

With the inclusion of diagnostics for the CIP messaging channel, the 1715
Redundant I/O system can be used for SIL 2 safety applications. For
information about SIL 2 safety applications, see Chapter 7

and Chapter 8.

System Architecture The 1715 Redundant I/O System operates with a pair of 1715-AENTR adapters.

When designing your control system by using the 1715 Redundant I/O System,
you can use digital and analog I/O modules in one of these ways:

• One I/O module in Simplex mode

• One I/O module with the option to add a second module

• A pair of I/O modules that work in Duplex mode

You must decide the layout of your I/O before building your system, but you
can add more I/O at any time.

The use of termination assemblies communicates the I/O mode of operation
you choose (Simplex or Duplex) to your system through the backplane (the
adapter and I/O base units).

Termination Assemblies

The termination assembly (TA) matches your software configuration for
simplex or duplex. Attached to an I/O base, the TA can start in any slot and can
span multiple connected bases. When modules are used in Duplex mode, one
module can be absent and the system still runs.

Base Unit Structure

The adapter base unit is always the leftmost base unit in the connection chain.
The total length of the base unit connection chain, including all expansion
cables cannot exceed 10 m (32.81 ft).

An adapter always occupies slot 0 or 1.

An adapter base unit can support up to 8 I/O base units (up to 24 I/O modules).

14 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 1 Redundancy System Overview

1715-AENTR Adapters

The leftmost adapter position, or slot, is 0. The rightmost adapter slot is 1. One
redundant adapter pair always occupies slots 0 and 1 of the system. ‘A’
designates the primary adapter partner and ‘B’ designates the secondary
adapter partner of the redundant adapter pair. This system is designed to run
with two adapters. It can run with one adapter for a limited time while
replacing a damaged module, but ideally, needs both adapters running
simultaneously.

IMPORTANT

There is no method for configuring a system to use only one 1715­AENTR adapter. If you use only one 1715-AENTR adapter, the
unused module generates errors.

A ‘partner’ adapter can be installed or removed for replacement,
while the 1715 Redundant I/O System is operational. The ‘partner’
adapter can be identified by the Network Status Light Emitting
Diode (LED) flashing green. During replacement of the module,
there is a one-time, up to a maximum 500 ms, delay to the
system.

I/O Modules

I/O module slots are numbered from 2…25, based on distance from the adapter
base unit. If duplex I/O module pairs are used, the two modules of the pair
must be in adjacent slots. The left, lower slot number is considered the slot
number and address for the pair. Any combination of simplex modules and
duplex pairs can be used in one or more connected I/O base units.

IMPORTANT

A ‘partner’ I/O module can be installed or removed while the 1715
Redundant I/O System is operational, without impact to the rest
of the system.

Module Positioning in the 1715 Redundant I/O System

There are 26 total slot positions in the system numbered from 0…25. The first
two positions always contain the redundant adapter pair, in slots 0 and 1. The
remaining positions begin numbering at slot 2 and contain the I/O modules,
ending at slot position number 25. Any combination of simplex or duplex I/O
module pairs can be used in the I/O base units. See Table 2
a system could look like.

Expansion cables can be used to connect base units, as shown in Figure 1 on

page 17.

The sample system configuration in Example 1 does not match the system
layout that is displayed in Example 2. Example 1 and Example 2 are different
examples of possible configurations you can have for your system.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 15

for a sample of what

Chapter 1 Redundancy System Overview

Table 2 - Example 1 - A Sample System Configuration

System Slot Number Base Unit Type

0 Adapter 0 Adapter A
1 Adapter 1 Adapter B
2 I/O 01 First I/O base unit Module A of first duplex pair
3 I/O 02 Module B of first duplex pair
4 I/O 03 Module A of second duplex pair
5 I/O 04 Second I/O base unit Module B of second duplex pair
6 I/O 05 First simplex module
7 I/O 06 Module A of third duplex pair
8 I/O 07 Third I/O base unit Module B of third duplex pair
9 I/O 08 Second simplex module
10 I/O 09 Third simplex module
11…25 I/O 10…24 Fourth…eighth I/O base unit Any combination of simplex/duplex pair modules

Module Position/Slot Number by Base
Unit Type

Module Designation

16 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 1 - Example 2 - A Sample System Layout

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

Reset

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

Reset

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

32066-M

Chapter 1 Redundancy System Overview

Layout the Hardware This section discusses how to lay out the hardware for the system by topology.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 17

Chapter 1 Redundancy System Overview

1756-RM2

1756-EN2TR

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

1715-AENTR

1756-EN2TR

1756-RM2

1715-AENTR

1715-I/O

1715-I/O

1715-I/O

1715-I/O

1715-I/O

1715-I/O

1756 ControlLogix

Primary Chassis

1756 ControlLogix

Secondary Chassis

1756 RM Cable

1715 Redundant I/O

System

45242

System Context

The redundant I/O subsystem must be connected to one ControlLogix
redundancy system, or any Logix system that supports I/O via the
EtherNet/IP™ network. The topologies that the 1756-EN2T or 1756-EN2TR
modules support, DLR (Ring) or Star, establish all connections via the Ethernet
network.

For more information about DLR topologies, see the EtherNet/IP Embedded
Switch Technology Application Guide, publication ENET-AP005

Figure 2 - 1715 Redundant I/O System DLR (Ring) Topology Attached to a 1756 ControlLogix Enhanced
Redundancy System

.

18 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 1 Redundancy System Overview

1756-RM2

1756-EN2T

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

1715-AENTR

1756-EN2T

1756-RM2

1715-AENTR

1715-I/O

1715-I/O

1715-I/O

1715-I/O

1715-I/O

1715-I/O

1756 ControlLogix

Secondary Chassis

1756 ControlLogix

Primary Chassis

1715 Redundant I/O

System

1756 RM Cable

Ethernet

Switch

45239

Figure 3 - 1715 Redundant I/O System Star Topology Attached to a 1756 ControlLogix Enhanced
Redundancy System

To prevent ground loops caused by shielded cables, RJ45 shields on the
ethernet ports on the 1715 adapter base unit are connected to earth through a
parallel resistance /capacitance circuit arrangement as shown in Figure 4
below:

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 19

Chapter 1 Redundancy System Overview

Resistor

Figure 4 - Shield Termination Arrangement to prevent Ground Loops

RJ 45
Shield

Transient

Capacitor

Protection
Device

This complies with the shield grounding guidance given in The CIP Networks
Library, Volume 2, Edition 1.21, section 8-9.4.3. ©ODVA, Inc. 2016.

For more information regarding ODVA, visit www.odva.org

.

Simplex Architecture

Simplex I/O modules fail-safe on the first detected module fault. The process
under control shuts down when the fault is detected.

This configuration is suitable for high and low demand module applications.

20 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 5 - Simplex Architecture - Input and Output

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

1715-AENTR

1715-AENTR

1715-IB16D

1715-OB8DE

ADAPTER

ADAPTER

O/P

I/P

SENSORS

FINAL

ELEMENTS

1715-

TADOB8DE

1715-

TADIB16D

1715-A2A

1715-A3IO

ControlLogix

CIP NETWORK

Digital Output

Simplex Termination

Assembly

Digital Input

Simplex Termination

Assembly

Adapter

Base Unit

I/O Base Units

45241

Chapter 1 Redundancy System Overview

Duplex Architecture

An example configuration of dual input modules and adapters, and an output
module is shown in Figure 6
provides fault tolerance for module failures. The duplex arrangement can be
used for low demand and high demand applications.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 21

. A redundant input or redundant output module

Chapter 1 Redundancy System Overview

ADAPTER

ADAPTER

O/P

I/P

I/P

CLX

CIP NETWORK

Figure 6 - Duplex Architecture Duplex Inputs, Simplex Output

22 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 7 - Duplex Architecture Inputs and Outputs

1715-AENTR

1715-AENTR

ADAPTER

ADAPTER

O/P

I/P

SENSORS

FINAL

ELEMENTS

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

1715-IB16D

1715-IF16

I/P

O/P

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

1715-IB16D

1715-IF16

1715-

TADIF16

1715-

TADIB16D

1715-A2A

1715-A3IO

1715-A3IO

CLX

CIP NETWORK

Chapter 1 Redundancy System Overview

Termination assemblies can span across I/O base units.

Mixed Architecture

There can be a mixture of architectures within one system. Figure 8 shows
simplex and dual I/O configurations with dual processors.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 23

Chapter 1 Redundancy System Overview

1715-AENTR

1715-AENTR

ADAPTER

ADAPTER

O/P

SENSORS

FINAL

ELEMENTS

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

1715-IB16D

1715-OB8DE

I/P

O/P

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

1715-IB16D

1715-OB8DE

1715-

TADOB8DE

1715-

TADIB16D

1715-A2A

1715-A3IO

1715-A3IO

I/P

I/P

O/P

1715-IB16D

FINAL

ELEMENTS

SENSORS

1715-

TASIB16D

1715-

TASOB8DE

1715-OB8DE

CLX

CIP NETWORK

45423

Figure 8 - Mixed Architecture

Bus Diagram

A detailed drawing of the backplane is shown Figure 9.

24 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 9 - Bus Diagram of 1715 Redundant I/O System

Chapter 1 Redundancy System Overview

Switchover Considerations Each 1715 Redundant I/O System uses one IP address as the primary IP address

for all communication on the EtherNet/IP network. The redundant adapter
pair consists of two active modules, a primary adapter and its partner, a
secondary module. For this document, the primary module is referred to as
module ‘A’ and the secondary module is referred to as module ‘B’.

On power-up, the adapter in the leftmost slot is considered the primary
module (when two adapters are present) because it uses the primary IP
address, and because it is the module responsible for receiving/transmitting to
ControlLogix controller on the EtherNet/IP network.

The module in the rightmost slot is considered the secondary module partner
and uses the primary IP address +1. For example, if the primary module in the
leftmost slot has an IP address of ‘N’, then the secondary module in the
rightmost slot, has an IP address of ‘N+1’.

Both modules are always active and are responsible for monitoring all inputs
and outputs, monitoring diagnostics in the system, and reading and writing
data from/to I/O simultaneously. When the primary module receives a write, it
notifies the secondary module of the data to write and which module to write it
to. At a synchronized point in time, both adapters physically write to the I/O.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 25

Chapter 1 Redundancy System Overview

The adapters negotiate which module is primary, depending on the status of
the system. If the primary module is unable to perform its role, for example, if
a fault occurs in the primary module, then the secondary module becomes the
new primary, assuming the IP address of the primary module, taking over the
role of communication. The primary module is the only module of the pair that
produces data on the EtherNet/IP network.

If there is a fault, the IP address swapping between the primary module and
the secondary module takes no longer than 20 ms from the time of the
initiating fault. The secondary module is the new primary and handles all
communication. (Depending on the structure of your Ethernet configuration,
this time can be impacted.)

This IP address swap is transparent to the user. You can detect which module
the primary module is by examining the Network status indicator near the top
of each adapter. On the primary adapter, the Network status indicator is solid
green; on the secondary adapter, the Network status indicator flashes green.

Once a swap occurs, the ‘new’ primary module remains the primary unless
there is a good reason to swap over again. If the B module becomes the primary
module because you must replace the A module, that is not enough cause to
swap IP addresses back again. Module B remains as the primary module.

Obtaining a New IP Address

The IP address of the primary module is stored in the adapter base unit
through interaction with the TCP/IP object. If a stored primary IP address is
available, the adapter uses that address. If a stored primary IP address is not
available, then the adapter uses BOOTP/DHCP to obtain an IP address.

The adapter transmits DHCP requests, but is able to process a BOOTP/DHCP
response from either a DHCP or BOOTP server. If the BOOTP/DHCP request is
unsuccessful, the secondary adapter (that is, Module B), attempts to obtain the
IP address of the primary module through BOOTP/DHCP.

The adapters continue to attempt BOOTP/DHCP configuration until an IP
address is obtained, alternating between adapters A and B. Once an adapter
has obtained the IP address, the secondary module can use that IP address + 1.

Once an adapter has a primary IP address, it confirms that it does not have a
duplicate IP address. See EtherNet/IP Network Configuration User Manual,
publication ENET-UM001
IP addresses by showing solid RED.

For additional information about assigning an IP address for the first time, see
Chapter 2, Assign an IP Address

. The Network Status indicator displays duplicated

on page 123.

Ethernet Topology

The 1715 Redundant I/O System supports DLR (Ring) and Star Topologies.

26 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 1 Redundancy System Overview

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Module A
Port 1
Port 2

Module B
Port 1
Port 2

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Module A
Port 1
Port 2

Module B
Port 1
Port 2

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

45240

For a DLR (Ring) Topology, the Ethernet ports of the adapters are configured
with the outward-facing ports (Port 1 of Module A and Port 2 of Module B)
operating as a 2-port switch. Port 2 of Module A and Port 1 of Module B are
chained together.

Figure 10 - DLR (Ring) Ethernet Topology

For a STAR Topology, the Ethernet ports of the adapters are configured with
the leftmost ports (Port 1 of Module A and Port 1of Module B) operating as a
2-port switch. The rightmost ports on each adapter are left unused.

Figure 11 - STAR Ethernet Topology

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 27

Chapter 1 Redundancy System Overview

For Ethernet considerations, see EtherNet/IP Network Configuration User
Manual, publication ENET-UM001
Manual, publication 1756-UM535

, and ControlLogix Redundancy User

.

Communication on the EtherNet/IP Network

Communication to a simplex module is addressed to the slot number for that
module. CIP communication to modules in a duplex configuration (including
the adapters) is addressed to the lowest slot number for the module pair.

The adapters respond with CIP errors for attempts to communicate to an I/O
module of a type that is not the same as the physically installed module.

The termination assembly type (simplex/duplex) determines the CIP messages
for corresponding CIP objects that the adapter processes for each I/O module.

System Performance This section discusses connections and RPI settings for the 1715 Redundant I/O

System.

Input / Output Traffic Prioritization

Note:In order to respect its IO schedule, the 1715 privileges class 1 (IO) traffic
over class 3 traffic.

Connections

The adapter has one required connection and does not support a rack
connection.

Each I/O module has one required connection (simplex or duplex).

For example, the system in Figure 12
one is simplex. They are all configured for data connection.

has five I/O modules. Four are duplex and

28 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 12 - Duplex and Simplex Connections

The example in Figure 12 shows six connections; one for each entry in the
configuration.

Table 3 - RSLogix 5000® or Studio 5000 Logix Designer® Configuration

Chapter 1 Redundancy System Overview

Connection Module Duplex/Simplex Module Description

1 1715-AENTR Duplex Ethernet Adapter
1 1715-IB16D Duplex 16-point Digital Input
1 1715-OB8DE Duplex 8-point Diagnostic Digital Output
1 1715-IF16 Duplex 16-point Analog Input
1 1715-OF8I Duplex 8-point Analog Digital Input
1 1715-IF16 Simplex 16-point Analog Input

The digital module connections use change-of state-triggers, and the adapter
and analog module connections use cyclic triggers.

RPI

The RPI you set specifies the maximum amount of time between data updates.
The 1715 modules support an RPI range of 60…750 ms.

Cat. No. Minimum RPI Maximum RPI Default RPI

1715-AENTR
1715-IB16D 60 ms
1715-OB8DE 60 ms
1715-IF16 120 ms
1715-OF8I 120 ms

60 ms 750 ms

180 ms

Connection and Data Format

The adapter and I/O modules each support one data connection for input/
output data. Listen Only connections are not supported.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 29

Chapter 1 Redundancy System Overview

Timestamping A timestamp is the time an event occurred. It is recorded by the 1715 system

and passed to ControlLogix. Timestamp resolution is in μs, but 1715 is accurate
to 10 ms typical.

30 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Installation Instructions

Top ic Pa ge

Before You Begin 36
System Hardware Components 38
System Software 51
Module Placement 53
Install Summary 55
Product Dimensions 56
DIN Rail Assembly 57
Install the Power Supply 60
Install the Adapter Base Unit 61
Install the I/O Base Unit 62
Install Termination Assembly to I/O Base Unit 64
Mount I/O Expansion Cable 67
Wire the Adapter 72
Connect Field Wiring 74
Connect the Adapter to the Ethernet Network 96
Module Keying 97
Electronic Keying 100
Install the Adapters 101
Assign an IP Address 104
Install the I/O Modules 110
Install Slot Filler Covers 112
Remove Modules 112

Chapter 2

This chapter explains how to build the 1715 Redundant I/O System. These
installation instructions include how to build the backplane by connecting the
adapter and I/O base units and mounting them on DIN rails within a cabinet,
how to install and wire the termination assemblies, how to mount the adapter
and the I/O modules onto the system, and how to use expansion cables to allow
for additional space requirements for the system within an enclosure.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 31

Chapter 2 Installation Instructions

ATT ENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category

II applications (as defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not provide adequate protection to radio
communication services in such environments.

This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed
for those specific environmental conditions that will be present and appropriately designed to prevent personal injury
resulting from accessibility to live parts. The enclosure must have suitable flame-retardant properties to prevent or
minimize the spread of flame, complying with a flame spread rating of 5VA or be approved for the application if non­metallic. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this
publication may contain additional information regarding specific enclosure type ratings that are required to comply
with certain product safety certifications.

In addition to this publication, see the following:

• Industrial Automation Wiring and Grounding Guidelines, publication

• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the degrees of protection provided by enclosures

ATT ENTION: This equipment is sensitive to electrostatic discharge, which can cause internal damage and affect
normal operation. Follow these guidelines when you handle this equipment:

• Touch a grounded object to discharge potential static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component boards.

• Do not touch circuit components inside the equipment.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging when not in use.

Environment and Enclosure

1770-4.1, for additional installation requirements

Prevent Electrostatic Discharge

ATT ENTION: Do not insert or remove a module, base unit or termination assembly while power is applied. Interruption

of the backplane can result in unintentional operation or machine motion.

ATT ENTION: For UL approved installations, the 1715-OB8DE output power source must be isolating, wired with a

2

minimum of 0.75 mm

(18 AWG) wire and fused with a rating of 32V DC min/5 A max.

ATT ENTION: Do not wire more than 1 conductor on any single terminal.

ATT ENTION: This equipment is not resistant to sunlight or other sources of UV radiation.

32 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

European Hazardous Location Approval

The following applies when the product bears the Ex Marking.

This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC and
has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of
Category 3 equipment intended for use in Zone 2 potentially explosive atmospheres, given in Annex II to this Directive.

Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15 and EN
60079-0.

ATEX/IECEx Certification:
Certificate number: DEMKO 11 ATEX 7928686X

II 3G Ex nA IIC T4 Gc
Certificate number: IECEx UL 15.0032X
Ex nA IIC T4 Gc
The ambient temperature range is -25…+60 °C (-13…+140 °F) for all models.
Essential Health and Safety Requirements:
Met by compliance with the standards EN 60079-0: 2012 + A11:2013, EN 60079-15: 2010 and IEC 60079-0: Edition 6, IEC 60079-15:

Edition 4.
Special Conditions for Safe Use:

• All models: the ambient temperature range is -25 …+60 °C (-13…+140 °F)

• Subject devices are to be installed in an ATEX/IECEx Certified, IP54, tool accessible enclosure that has been evaluated to the

requirements of
EN 60079-0: 2012 + A11:2013, EN 60079-15: 2010 and IEC 60079-0: Edition 6, IEC 60079-15: Edition 4. Enclosure is to be marked
with the following: "Warning - Do not open when energized". After installation of subject devices into the enclosure, access to
termination compartments shall be dimensioned so that conductors can be readily connected. Grounding conductor should
have a minimum cross sectional area of 3.31 mm² (12 AWG).

• Subject devices are for use in an area of not more than pollution degree 2 in accordance with IEC 60664-1.

• Subject devices are to use conductors with a minimum conductor temperature rating of 85 °C (185 °F).

• Subject devices are to be installed in the vertical orientation only.

WARNING:

• This equipment shall be mounted in an ATEX-certified enclosure with a minimum ingress protection rating of at least
IP54
(as defined in IEC60529) and used in an environment of not more than Pollution Degree 2 (as defined in IEC 60664-1)
when applied in Zone 2 environments. The enclosure must have a tool-removable cover or door.

• This equipment shall be used within its specified ratings defined by Rockwell Automation.

• Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 140%
of the rated voltage when applied in Zone 2 environments.

• This equipment must be used only with ATEX certified Rockwell Automation Termination Assemblies.

• Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or
other means provided with this product.

• Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.

• Enclosure must be marked with the following: ‘Warning - Do not open when energized.’ After installation of equipment
into the enclosure, access to termination compartments shall be dimensioned so that conductors can be readily
connected.

For more information, refer to

• 1715 Series Redundant I/O System - ATEX certificate,
publication 1715-CT002

.

• 1715 Series Redundant I/O System - IECEx certificate,
publication 1715-CT001

.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 33

Chapter 2 Installation Instructions

WARNING: If you connect or disconnect the communication cable with power applied to this module or any device on the

network, an electrical arc can occur. This could cause an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.

WARNING: If you connect or disconnect wiring while the field-wire power is on, an electrical arc can occur. This could
cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before
proceeding.

WARNING: If you insert or remove a base unit or termination assembly while power is applied, an electrical arc can occur.
This could cause an explosion in hazardous location installations.
Be sure that power is removed before proceeding.

Multi-point Network Communication Connections

Field-side Power

Removal and Insertion Under Power (RIUP) Fuses

WARNING: Do not remove or replace fuses when energized. This could cause an explosion in hazardous location

installations.
Be sure that power is removed or the area is nonhazardous before proceeding.

34 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

North American Hazardous Location Approval

Chapter 2 Installation Instructions

The following information applies when operating this equipment in
hazardous locations.

Products marked ‘CL I, DIV 2, GP A, B, C, D’ are suitable for use
in Class I Division 2 Groups A, B, C, D, Hazardous Locations
and nonhazardous locations only. Each product is supplied
with markings on the rating nameplate indicating the
hazardous location temperature code. When combining
products within a system, the most adverse temperature
code (lowest ‘T’ number) be used to help determine the
overall temperature code of the system. Combinations of
equipment in your system are subject to investigation by the
local Authority Having Jurisdiction at the time of installation.

EXPLOSION HAZARD

• Do not disconnect equipment unless
power has been removed or the area is
known to be nonhazardous.

• Do not disconnect connections to this
equipment unless power has been
removed or the area is known to be
nonhazardous. Secure any external
connections that mate to this
equipment by using screws, sliding
latches, threaded connectors, or other
means provided with this product.

• Substitution of components may
impair suitability for Class I, Division 2.

• If this product contains batteries, they
must only be changed in an area
known to be nonhazardous.

Informations sur l'utilisation de cet équipement en environnements
dangereux.

Les produits marqués ‘CL I, DIV 2, GP A, B, C, D’ ne
conviennent qu'à une utilisation en environnements de
Classe I Division 2 Groupes A, B, C, D dangereux et non
dangereux. Chaque produit est livré avec des marquages
sur sa plaque d'identification qui indiquent le code de
température pour les environnements dangereux. Lorsque
plusieurs produits sont combinés dans un système, le
code de température le plus défavorable (code de
température le plus faible) peut être utilisé pour
déterminer le code de température global du système. Les
combinaisons d'équipements dans le système sont
sujettes à inspection par les autorités locales qualifiées
au moment de l'installation.

RISQUE D’EXPLOSION –

• Couper le courant ou s'assurer
que l'environnement est classé
non dangereux avant de
débrancher l'équipement.

• Couper le courant ou s'assurer
que l'environnement est classé
non dangereux avant de
débrancher les connecteurs.
Fixer tous les connecteurs
externes reliés à cet équipement
à l'aide de vis, loquets
coulissants, connecteurs filetés
ou autres moyens fournis avec ce
produit.

• La substitution de composants
peut rendre cet équipement
inadapté à une utilisation en
environnement de Classe I,
Division 2.

• S'assurer que l'environnement est
classé non dangereux avant de
changer les piles.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 35

Chapter 2 Installation Instructions

Before You Begin This section lists important information that you must consider before

starting to build your 1715 Redundant I/O System:

• Review the parts list and identify the system components.

• Review the power requirements for the system and for field devices.

• Review design considerations for heating and cooling.

• Specify an enclosure.

• Install the necessary software.

Ensure that Warranty is Not Compromised

ATTENTION: Failing to install retaining clips and properly secure the

Terminal Assembly (TA) can lead to connector / pin damage on the
modules and the 1715-A3IO. Failure to comply with this Attention Notice
will render the Warranty void and the equipment will not be covered.

Graphical Representation

IMPORTANT

Throughout this manual, some graphics do not depict the actual
hardware as required. These graphics are for representational
purposes only and do not necessarily reflect the actual
component layout of your system.

Parts List

These parts are available to build a 1715 Redundant I/O System. Their
description and catalog part numbers are as follows.

Table 4 - Parts Table

Cat. No. Description

1715-AENTR Adapter
1715-IB16D 16-channel digital input module
1715-OB8DE 8-channel digital output module
1715-IF16 16-channel analog input module
1715-OF8I 8-channel analog output module
1715-A2A 2-slot adapter base unit
1715-A3IO 3-slot I/O base unit
1715-TASIB16D Termination assembly - digital input simplex
1715-TADIB16D Termination assembly - digital input duplex
1715-TASOB8DE Termination assembly - digital output simplex
1715-TADOB8DE Termination assembly - digital output duplex
1715-TASIF16 Termination assembly - analog input simplex
1715-TADIF16 Termination assembly - analog input duplex
1715-TASOF8 Termination assembly - analog output simplex
1715-TADOF8 Termination assembly - analog output duplex
1715-N2T Tall slot filler cover
1715-N2S Short slot filler cover
1715-C2 Expansion cable - 2 m

36 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

Wireway

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel15

Channel 16

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

15.3 (6.0)

10.2 (4.0)

15.3…20 (6.0…8.0)

10.2 (4.0)

5.1 (2.0)

5.1 (2.0)

15.3 (6.0)

7.7…10.2

(3.0 …4.0)

Required Tools

The installation and maintenance of the 1715 Redundant I/O System requires
these tools:

• Screwdriver, 0.8 x 9.0 mm (1/25 x 3/8 in.), for module clamp screws and
slot filler covers

• Torque screwdriver, 0.6 x 3.0 mm (1/40 x 1/8 in.), for DC power wiring
terminals

• Torque screwdriver, 0.4 x 2.0 mm (1/64 x 5/64 in.), for field wiring
terminals

• Two open-end wrenches, 10 mm (0.39 in.), for ground stud nuts

• A 2.5 mm (0.10 in.) Allen wrench

Spacing Requirements

You must consider spacing requirements before mounting your system.

IMPORTANT

Make sure that you meet the minimum spacing requirements
shown.

Allow 15.3…20 cm (6.0…8.0 in.) between chassis and a heat
source, and chassis and cabinet, and allow 5.1 cm (2.0 in.)
between wireway and top or bottom of chassis.

Dimensions are in cm (in.).

Figure 13 - Cabinet

IMPORTANT

When installing the system in a chassis, note that chassis are
intended to be mounted horizontally only. Install the modules in the
chassis in a vertical orientation only.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 37

Chapter 2 Installation Instructions

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

32065 M

System Hardware Components

The 1715 Redundant I/O System is a remote redundant I/O system that was
developed to communicate with a Logix controller in a ControlLogix®
enhanced redundant system by using the EtherNet/IP network and includes
these components:

• A pair of 1715-AENTR adapters serves as a ‘proxy’ for all EtherNet/IP
messages to and from redundant I/O modules.

• 1715 digital and analog I/O modules.

• A 1715-A2A dual redundant I/O adapter base unit connects to a
1715-A3IO I/O module base unit to form the backplane for the system.

• Termination assemblies are available in Simplex and Duplex
configuration. They mount onto the 1715-A3IO I/O module base unit, and
connect the I/O modules to the I/O wiring.

• Each 1715-A3IO I/O base unit holds up to three I/O modules. Up to
24 I/O modules can be added to the system.

• The system is built on DIN rails within a cabinet enclosure.

• 1715-C2 expansion cables can be used to allow for space restrictions of the
system within the cabinet.

IMPORTANT

Conformal coating is standard on all 1715 modules.

The general system layout for the 1715 Redundant I/O System consists of the
following hardware components.

1715-AENTR Adapter Redundant Pair

The 1715 adapter communicates via the EtherNet/IP network to a 1756
ControlLogix controller, which conveys system I/O data.

38 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 14 - 1715-AENTR Adapter

32096-M

Rack Status

Ethernet 1

Ethernet 2

1715-AENTR

ADAPTER

Reset

Module Status

Redundancy Status

Network Status

32096-M

Rack Status

Ethernet 1

Ethernet 2

1715-AENTR

ADAPTER

Reset

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

1715-AENTR

ADAPTER

Reset

Module Status

Redundancy Status

Network Status

32096 M

Do not open this module door, or plug or
insert anything into the port.

1715-AENTR Redundant
Adapter Pair

Chapter 2 Installation Instructions

IMPORTANT

Do not open this module door, or plug or insert anything into the
port behind the module door unless instructed to do so by
technical support.

1715 Digital and Analog I/O Modules

Your system can be configured with any combination of I/O modules, and in
either Simplex or Duplex mode. These I/O modules can be included in your
system:

• 1715-IB16D 16-channel digital input module

• 1715-OB8DE 8-channel digital output module

• 1715-IF16 16-channel analog input module

• 1715-OF8I 8-channel analog output module

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 39

Chapter 2 Installation Instructions

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

1715-IB16D

DIGITAL INPUT

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

1715-OB8DE

DIGITAL OUTPUT

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

1715-IF16

ANALOG INPUT

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

1715-OF8I

ANALOG OUTPUT

Healthy

Ready

Run

1715-IB16D 16-channel Digital Input

Module

1715-OB8DE 8-channel Digital Output

Module

1715-IF16 16-channel Analog Input

Module

1715-OF8I8 8-channel Analog Output

Module

32092 M

32090 M

32091 M

32089 M

Figure 15 - 1715 Digital and Analog I/O Modules

1715-A2A Adapter Base Unit

The adapter base unit holds a pair of adapters.

40 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

32060 M

Adapter Base Unit Fuses

The 1715-A2A adapter base unit contains four fuses.

To replace the fuses, follow this procedure.

1. Lift the door to access the fuses.

The fuses are labeled from F1…F4, from left to right. The replacement fuse
part number is Littelfuse 0154004.DRT.

2. With a pair of small long-nosed pliers, remove and replace the blown
fuse.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 41

Chapter 2 Installation Instructions

32060 M

Lift door to access fuses

Use replacement fuse 4 A slow blow fuses in OMNI-BLOK
holders manufactured by Littelfuse. Remove and replace
with a pair of long-nosed pliers.

Fuses

Figure 16 - Power Routing of Adapter Base Unit Fuses

Fuses F1 and F3 have independent tags under the 1715-AENTR module
status flags. For example, in Figure 17

, F3 is blown or adapter power is

missing to the PWR-2 connector.

42 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

Figure 17 - Fuse Tags

The F2 and F4 fusing faults of the 1715 I/O modules cannot be pinpointed. All
healthy I/O module status indicators showing solid red indicates a blown F2 or
F4 fuse.

The adapter tags indicate each individual I/O module tag, ModAFault and
ModBFault, as shown in Figure 18

Figure 18 - Adapter Tags Indicate Faults

.

IMPORTANT

After any fuse replacement or power-related issue on PWR-1/
PWR-2, the Reset button on the 1715-AENTR must be pressed to
clear the fault and reset the status indicator back to solid green.

1715-A3IO I/O Base Unit

The I/O base unit holds up to three I/O modules.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 43

Chapter 2 Installation Instructions

32059 M

I/O Termination Assemblies

I/O termination assemblies are inserted into the I/O base units. There are
eight types of termination assemblies (two for each module) depending on the
architecture of your system and the I/O modules you are going to use.

Table 5 - I/O Termination Assembly Descriptions

I/O Module Termination Assembly Cat. No. Termination Assembly Description

1715-IB16D

1715-OB8DE

44 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

1715-TASIB16D Digital input simplex
1715-TADIB16D Digital input duplex
1715-TAS0B8DE Digital output simplex
1715-TADOB8DE Digital output duplex

Chapter 2 Installation Instructions

Table 5 - I/O Termination Assembly Descriptions

I/O Module Termination Assembly Cat. No. Termination Assembly Description

1715-IF16

1715-OF8I

1715-TASIF16 Analog input simplex
1715-TADIF16 Analog input duplex
1715-TASOF8 Analog output simplex
1715-TADOF8 Analog output duplex

Digital Input Termination Assemblies

Digital input termination assemblies support these features:

• 16-channel simplex TA provides termination for 16 digital input channels

• Industry-standard field device connections at terminal blocks

• 24V DC digital input channels with a load of 5.11 k

• Individually fused channels with over voltage input protection

There are two types of digital input termination assemblies:

• A 1715-TASIB16D, 16-channel simplex TA that provides termination for 16
digital input channels and mates with one 1715-IB16D digital input
module

• A 1715-TADIB16D, 16-channel duplex TA that provides termination for 16
digital input channels and mates with up to two 1715-IB16D digital input
modules

per input channel

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 45

Chapter 2 Installation Instructions

1616

1616

FH1FH1

FH2FH2

FH3FH3

FH4FH4

FH5FH5

FH6FH6

FH7FH7

FH8FH8

FH9FH9

J1J1

TB1TB1

TB2TB2

J2J2

FH10FH10

FH11FH11

FH12FH12

FH13FH13

FH14FH14

FH15FH15

FH16FH16

FH1FH1F1

OVOV

OVOV

CH0CH0

CH1CH1

CH2CH2

CH3CH3

CH4CH4

CH5CH5

CH6CH6 CH7CH7

CH8CH8 CH9CH9

CH10CH10CH11CH11

CH12CH12

CH13CH13

CH14CH14 CH15CH15

1

a

c

c

b

1

a

c

c

b

1715-TASIB16D

Digital Input Simplex

Termination Assembly

1715-TADIB16D

Digital Input Duplex

Termination Assembly

32120 M

32095

Fuse Type: Littelfuse No. 396/TE5 50 mA Timelag Fuse; UL 248-14, 125V, T Leadfree for Digital Input Termination Assemblies. Remove and replace fuses with a pair of long­nosed pliers.

Terminal Block Cable Entry This Side

Fuse Cover

Coding Pegs

Field Connections This Side

Fuse
Covers

Coding Pegs

Figure 19 - 1715-TASIB16D and 1715-TADIB16D Digital Input Termination Assemblies

Fuse

CH0 CH1 CH2

Channel -

Channel +

TB1 TB2

Fuse
Holder

FS1 FS3 FS5 FS7

FS2

16

CH4CH5 CH6CH7 CH8CH9

CH3

FS9 FS11 FS13 FS15

FS4 FS6 FS8

J1

cc cc

J2 J4

16 16 16

11 11

FS10 FS12 FS14 FS16

CH10CH11CH12

J3

CH13

CH14

CH15

32120 -M

The simplex termination assembly routes the input signals to one input
module. In duplex arrangements, the input signals are routed to two parallel
modules.

See page 79

Digital Output Termination Assemblies

Digital output termination assemblies support these features:

• Provide connections for eight output channels

• Industry-standard field device connectors

•24V DC operation

• Provide a fused field voltage supply to the module

for detailed wiring instructions.

There are two types of digital output termination assemblies:

• A 1715-TASOB8DE digital output, 24V DC, 8-channel, simplex TA that
provides termination for 8 digital output channels and mates with one
1715-OB8DE digital output module

• A 1715-TADOB8DE digital output, 24V DC 8-channel duplex TA that
provides fault tolerant operation for 8 digital output channels and mates

46 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

with redundant 1715-OB8DE digital output modules

Chapter 2 Installation Instructions

TEST

Ov V1+ Ov V2+ O v V1+ Ov V2+

CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7

TB1 TB2 TB3 TB4

J1

FH1 FH2

1715-TADOB8DE

Digital Output Duplex

Termination Assembly

1715-TASOB8DE
Digital Output Simplex
Termination Assembly

32121 M

32093 M TA

10 A Fuse

Fuse type: Littelfuse Type 451 Omni-Block 10 A, 125V very fast acting fuse. Surface Mount Fuse Block 154 010 for Digital Ouptut Termination Assemblies. Use a pair of
long-nosed pliers for fuse removal and replacement.

Field Connections Entry This Side

Field Connections This Side

Coding Pegs

10 A Fuse

Figure 20 - 1715-TASOB8DE and 1715-TADOB8DE Digital Output Termination Assemblies

Ov

V1+ Ov V1+Ov V2+ Ov V2+

CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7

TB1 TB2 TB3 TB4

FH1

J1 J2

cc

See page 84 for detailed wiring instructions.

FH2

Analog Input Termination Assemblies

Analog input termination assemblies support these features:

• 16 input channels for a simplex/duplex configuration

• Industry-standard field device connections at the terminal blocks

• Analog input channels with a high reliability 120
termination per input channel

• Individually fused channels with over voltage input protection

precision resistor

32121 -M

There are two types of analog input termination assemblies:

• A 1715-TASIF16, 16-channel simplex TA that provides termination for 16
single-ended analog input channels and mates with one 1715-IF16
16-channel analog input module. There is no channel isolation.

• A 1715-TADIF16, 16-channel duplex TA that provides termination for 16
isolated analog input channels and mates with up to two 1715-IF16
16-channel analog input modules. The channels are isolated.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 47

Chapter 2 Installation Instructions

CH0 CH1 CH2 CH3

CH4 CH5 CH6 CH7 CH8 CH9

CH10 CH11 CH12 CH13 CH14 CH15

1715-TASIF16

Analog Input Simplex

Termination Assembly

1715-TADIF16

Analog Input Duplex

Terminat ion Asse mbly

32094 AI SIMPLEX TA

32120 M

Fuse Type: Littelfuse No. 396/TE5 50 mA Timelag Fuse; UL 248-14, 125V, T Leadfree for Analog Input Termination Assemblies. Use a pair of long-nosed pliers for
fuse removal and replacement.

Terminal Block Cable Entry This Side

Fuse Cover

Coding Pegs

Coding
Pegs

Fuse Covers

Field Connections This Side

Figure 21 - 1715-TASIF16 and 1715-TADIF16 Analog Input Termination Assemblies

Fuse

CH0 CH1 CH2

Channel -

Channel +

TB1 TB2

Fuse
Holder

FS1 FS3 FS5 FS7

FS2

cc cc

16

CH4CH5 CH6CH7 CH8CH9

CH3

FS9 FS11 FS13 FS15

FS4 FS6 FS8

J1

J2 J4

16 16 16

11 11

FS10 FS12 FS14 FS16

CH10CH11CH12

J3

CH13

CH14

CH15

32120 -M

See page 92 for detailed wiring instructions.

Analog Output Termination Assemblies

Analog output termination assemblies support these features:

• Eight output channels for a simplex/duplex configuration

• Industry-standard field device connections at the terminal blocks

• Analog output channels provide 4…20 mA DC for external field devices

• Duplex termination assembly provides increased fault tolerance for
output channels

There are two types of analog output termination assemblies:

• A 1715-TASOF8, 8-channel simplex TA that provides termination for 8
single-ended analog output channels and mates with one 1715-OF8I
8 -channel analog output module

• A 1715-TADOF8, 8-channel duplex termination assembly provides fault
tolerant operation for 8 analog output channels through inter-module
communication and by routing the output source current from two
modules to the same field device

48 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

J1 J2

cc

CH0 1 2 3 4 5 6 7

CH

LOOP-

DAOTA
PCB130861 REV A

LOOP+

TB1

J1 J2 J4

J3

01

TB2

23

TB3

45

TB4

67

1715-TASOF8
Analog Output Simplex
Termination Assembly

1715-TADOF8

Analog Output Duplex

Termination Assembly

32122 M

32123 M

IMPORTANT

The dual termination assembly does this by supporting inter­module communication for current sync operation and by routing
the channel outputs from two 8-channel analog output modules
in parallel to 8 field devices. Therefore, each field device
receives a current source from a channel on each of two
modules. So if one module fails, or one or more channels fail on a
module, the outputs from the second module continues to supply
the field devices.

Figure 22 - 1715-TASOF8 and 1715-TAD0F8 Analog Output Termination Assemblies

1715-C2 Expansion Cable

A 2 m (6.56 ft) expansion cable is available to connect I/O modules to field
devices, and to allow for space restrictions within the enclosure of the system.

IMPORTANT

• 1715-C2 cables must be secured when installed; use the provided
screws to secure the cable.

• 1715-C2 cables are rated 30V/9.6 A.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 49

Chapter 2 Installation Instructions

32086 M

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Slot Filler Covers

32078 M

1715-N2T and 1715-N2S Slot Filler Covers

Slot filler covers are available in two sizes to cover empty slots in your system.
Use the tall cover (catalog number 1715-N2T) when no termination assembly is
present. Use the short cover (catalog number 1715-N2S) when a slot has a
termination assembly, but no module.

Power Requirements

50 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

A 24V DC power supplied is required. See Install the Power Supply on page 60
for complete details.

ATTENTION: To comply with the CE Low Voltage Directive (LVD), all
connections to this equipment must be powered from a source
compliant with the following:

• Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV)

Chapter 2 Installation Instructions

ATTENTION: In high demand energise to trip and continuous demand

mode of operation additional protection will need to be in place to
inherently limit each 1715-AENTR power supply to a maximun 32 V.

Cooling Requirements

The 1715-AENTR adapter is designed to operate in its specified environment
without forced air cooling. Forced air cooling can be needed in individual
circumstances, such as when the system shares its enclosure with other heat
producing equipment.

Adequate ventilation must be provided for the system and the ambient
temperature in the enclosure must not be higher than the maximum operating
value of 60 °C (140 °F).

The adapter dissipates all power that it uses as heat. This is the power that is
supplied to the terminals on the 1715-A2A adapter base unit. The I/O modules
dissipate some of the power they take from the field power source as heat. The
actual amount of heat depends on the number of channels in use.

IMPORTANT

The 1715-AENTR adapter is open-type equipment that is rated IP20. This
provides protection against solid objects over 12 mm (0.47 in.), but does not
provide protection against liquids.

Cooling by Convection: For correct cooling of the equipment, fit
the base units in the vertical plane and orientate so the modules
are upright, with their ventilation slots at the top and bottom.

Heating Requirements

If enclosure is in colder environments, temperatures must be kept at

-20 °C (-4 °F) or above.

Specify an Enclosure

An enclosure for the 1715 Redundant I/O System must be designed for the
specific environmental conditions that are present. It must support the weight
of the system, provide mechanical protection, and remove the heat that the
system creates. If the application of the adapter is not using existing power
sources, the power supply units can be placed inside the enclosure.

ATTENTION: The modules contain static-sensitive devices that can be
damaged by incorrect handling. Label the exterior surface of the
enclosure to caution personnel to observe anti-static precautions when
handling the modules.

System Software The firmware on your 1715 Redundant I/O System can be updated with the

following ControlFLASH™ files:

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 51

Chapter 2 Installation Instructions

• Adapter ControlFLASH

• Adapter Recovery ControlFLASH

•I/O Module ControlFLASH

The files are available from the Product Compatibility and Download Center

website.

The Adapter module contains two sets of firmware. The normal firmware is
the operational firmware and allows connections from a Logix Controller. The
Recovery firmware is used to update the firmware in the I/O modules and help
diagnose problems. The normal and Recovery firmware are updated with
separate ControlFLASH files.

Before starting check that:

• RSLinx® Gateway has been installed and configured

• The BOOTP server has been configured with the MAC address and
suitable IP address for the 1715-AENTR

• The correct ControlFLASH file for the 1715-AENTR module or I/O module
has been installed

• If updating 1715 I/O module firmware, ensure that the 1715-AENTR
Recovery mode firmware from 1715 revision 3.001 or later is installed and
running (Recovery mode firmware revision 1.011 or later)

Dual 1715-AENTR modules are updated at the same time.

Each I/O module is updated separately, even if it is fitted to a dual termination
assembly.

Update procedure:

• Run the ControlFLASH program

• Select the type of module from the list

• Browse to the 1715-AENTR and open it, open the Backplane, then select
the module to be updated.

• Select the version of firmware to be sent to the module

• Update the module

• The firmware will be downloaded and stored on the module - this will
take between 2 minutes and 25 minutes

• Control FLASH will report the success or failure of the update

• Repeat for other modules that need to be updated

See document 1756-UM105

ControlFLASH firmware Upgrade Kit User Manual

in the Literature Library for detailed instructions for using ControlFLASH

When updating the firmware, it is recommended that RSWho is not actively
browsing the 1715-AENTR or the associated I/O modules.

When updating the firmware, it is recommended that RSWho is not actively browsing the 1715-AENTR or the associated I/O modules.

52 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Module Status

Redundancy Status

Network Status

Rack Status

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

1

4

2

3

5

6

7

8

9

10

11

32065 M

12

13

IMPORTANT

IMPORTANT

IMPORTANT

IMPORTANT

IMPORTANT

The 1715-AENTR modules revision I6 contain base code. Both the
normal and recovery mode firmware must be updated.

1715-AENTR modules newer than revision I6 and all I/O modules
contain the latest firmware at manufacture time. It may be
necessary to change the firmware to be compatible with your
system, or to upgrade to the latest version.

See the latest certifications for software and firmware at

rok.auto/certifications
http://www.tuvasi.com

. See the TÜV website at

for SIL 2 certification listings.

When updating firmware the 1715 Redundant I/O System is off
line. It must be in Recovery mode, or there must be no active
connections.

ControlFLASH can be used to update the firmware in the adapter
module.

From 1715 revision 3.001 and later, when in Recovery mode,
ControlFLASH can be used to update the firmware in the I/O
modules. (This is available in the Adapter Recovery ControlFLASH
version 1.011 and later.)

After upgrading a revision 1.005 1715 chassis to revision 2.001 or
later, power to the 1715 chassis must be cycled.

Module Placement A general overview of a typical redundant I/O system layout is shown here.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 53

Chapter 2 Installation Instructions

This illustration is only an example and is for illustrative purposes only.

Item Description

1 Adapter base unit
2 Adapter A module
3 Adapter B module
4I/O base unit
5 Simplex I/O module
6 Duplex I/O module - first in pair
7 Duplex I/O module - second in pair
8I/O base unit
9 Simplex I/O module
10 Duplex I/O module - first in pair
11 Duplex I/O module - second in pair
12 Power connections
13 Ethernet connections

The adapter and base units are DIN-rail mounted and connections are chained
together from left to right.

Base Units

The adapter base unit is always the leftmost base unit in the connection chain.
The total length of the base unit backplane length, including all expansion
cables cannot exceed 10 m (32.81 ft).

A base slot (adapter or I/O) consumes an address whether it is full or empty.
The first adapter in the pair occupies slot 0 and is on the left, the second
adapter occupies slot 1 and is on the right. Only adapters can occupy the slots
of the adapter base.

An adapter base unit can support up to 8 I/O base units (up to 24 I/O modules)
on its right side.

Module positions within the I/O base units are numbered from 2…25, the
leftmost position being slot 2.

The total number of slot positions in the system is 26; adapters occupy slots
0…1 and I/O modules occupy slots 2…25.

Expansion cables can be used to connect base units, as shown here.

54 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 23 - Example System Layout

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

Reset

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel07

Channel 08

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

Reset

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

32066 M

Chapter 2 Installation Instructions

Install Summary The 1715 Redundant I/O System is a modular system. The adapter and I/O base

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 55

units snap together by using mating connectors and retaining clips to form the
backplane.

The base units provide the interconnections for power, adapter, and I/O data.
Once connected, the base units form one mechanical assembly, or backplane.

Chapter 2 Installation Instructions

IMPORTANT

The insertion and removal of modules does not disturb the
electrical connections with field devices.

Step 1: Enclosure DIN Rail Assembly

The 1715 Redundant I/O System is assembled on DIN rails within an enclosure.

After deciding on an enclosure, install the DIN rails before building your
system.

Step 2: Build the System

After assembling the DIN rail enclosure, follow these steps in this order to
build your redundant I/O system.

1. Mount a 24V, user-supplied, power supply.

See the instructions that came with the power supply.

2. Mount the adapter base unit onto the DIN rails.

3. Mount the I/O base units onto the DIN rails.

4. Insert retaining clips to connect adapter and I/O base units.

5. Install anchor end stops onto the DIN rails.

6. Mount termination assemblies to the base units.

7. Mount I/O expansion cable, if needed.

8. Wire the adapter base.

• Connect to power.

• Wire the ground.

• Connect to field wiring.

9. Connect the adapter to the Ethernet network.

10. Module keying/verify coding peg positions.

11. Install the adapter redundant module pair.

12. Install the I/O modules.

13. Install slot filler covers over unused slots.

Product Dimensions This section outlines the space requirements for your 1715 Redundant

I/O System.

DIN Rail Mounting Dimensions

The system requires free space of at least 140 mm deep (5.51 in.) from front to
back between the rear panel of an enclosure and the inside of an enclosure
door.

56 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Module Status

Redundancy Status

Network Status

Rack Status

Ethernet 1

Ethernet 2

Reset

Ethernet 1

Ethernet 2

Reset

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

Healthy

Ready

Run

Module Status

Redundancy Status

Network Status

Rack Status

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Healthy

Ready

Run

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

Channel 08

Channel 09

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 00

Channel 01

Channel 02

Channel 03

Channel 04

Channel 05

Channel 06

Channel 07

32058 M

46 mm

(1.81 in.)

101 mm

(3.98 in.)

Each Base Unit (Two Shown) Occupies
126 mm (4.96 in.) Width

233 mm

(9.17 in.)

IMPORTANT

Allow sufficient free space around the base units. Every
installation needs space on at least three sides, as follows:

• Space above, to manipulate and install field wiring

• Space below, to enable modules to fit and to be able to grasp a
module during removal

• Space to the right, to maneuver an I/O base unit during assembly
or in the event of installing a new base unit

IMPORTANT

Minimum clearance between the product and the adjacent
equipment must be 15.3…20 cm (6.0…8.0 in.) between chassis
and a heat source, and allow 5.1 cm (2.0 in.) between wireway and
top or bottom of chassis.

DIN rail mounting is shown in the following figure.

DIN Rail Assembly The 1715 Redundant I/O System is mounted on DIN rails within an enclosure.

Pay special attention to dimensions needed for base unit placement.

For each pair of DIN rails, mount the lower rail with its center line
101 mm (3.98 in.) below the center line of the upper rail.

Free space must also be provided on each end of the DIN rail for the end stops,
if necessary.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 57

Chapter 2 Installation Instructions

32067 M

Component Size and Weights

Table 6 - Component Sizes

Item Size (H x W x D)

Adapter base unit 224 x 84 x 30 mm (8.82 x 3.31 x 1.18 in.)
I/O module base unit 233 x 126 x 18 mm (9.25 x 5 x 0.75 in.)
Module 166 x 42 x 118 mm (6.5 x 1.625 x 4.625 in.)

The total depth of a base unit and module is 136 mm (5.375 in.).

Figure 24 - Module Dimensions

All module dimensions are the same, whether they are adapters or I/O
modules.

58 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 25 - System Dimensions

32068 M

84 mm

(3.31 in.)

Chapter 2 Installation Instructions

126 mm

(4.96 in.)

237 mm

9.33 in.)

233 mm

(9.17 in.)

237 mm

9.33 in.)

Be sure that the mounting assembly can support the weight of the components
by using this table.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 59

Chapter 2 Installation Instructions

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

IO BASE

1715-A310

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA

Dual.

CH1

CH1

CH1

CH1

CH1

CH1

CH1

CH1

TERMINAL IDENTITY

AOTA
Dual.

24-28V

DC 24-28V

DC ok

100W max.

Single use

Parallel use

Table 7 - Component Weights

Cat. No. Component Weight g (oz)

1715-A2A Adapter base unit
1715-A3IO I/O base unit 220 (7.76)

1715-AENTR Adapter 420 (14.82)
1715-IB16D Digital input module 360 (12.70)
1715-IF16 Analog input module 360 (12,70)
1715-OB8DE Digital output module 290 (10.23)
1715-OF8I Analog output module 340 (11.99)
1715-TASIB16D Digital input simplex termination assembly 133 (4.69)
1715-TADIB16D Digital input duplex termination assembly 260 (9.17)
1715-TASIF16 Analog input simplex termination assembly 133 (4.69)
1715-TADIF16 Analog input duplex termination assembly 260 (9.17)
1715-TASOB8DE Digital output simplex termination assembly 133 (4.69)
1715-TADOB8DE Digital output duplex termination assembly 260 (9.17)
1715-TASOF8I Analog output simplex termination assembly 133 (4.69)
1715-TADOF8I Analog output duplex termination assembly 260 (9.17)
1715-N2S Short blank slot filler 40 (1.41)
1715-N2T Tall blank slot filler 50 (1.76)
Power supply User-supplied Varies

(1) All weights are approximate.

283 (9.98)

(1)

Install the Power Supply Power supplies must be installed to the left of the adapter base unit in a

position where the 24V DC supply wiring can be kept reasonably short.

Figure 26

Figure 26 - Power Supply

shows an example of a mounted power supply.

ATTENTION: To comply with the CE Low Voltage Directive (LVD), all
connections to this equipment must be powered from a source
compliant with the following:

• Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV)

ATTENTION: In high demand energize to trip and continuous demand
mode of operation the power supply for the 1715-AENTR should include
over voltage protection and supply a maximum of 32 V.

The 1715 Redundant I/O System requires 24V DC power with a tolerance
between 18…32V DC. The system has been designed to operate with most

60 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

commercially available industrial uninterruptible power supplies (UPS). To
select a suitable power supply, calculate the overall system load that must be
powered (by using the following table), include any additional devices and add
a contingency allowance between 25…50%.

Component Power Requirement

Adapter 8.0 W
Digital input module 4.0 W
Analog input module 4.0 W
Digital output module 3.0 W
Analog output module 3.6 W
Power supply Varies

Install the Adapter Base Unit

The adapter base unit supports a pair of adapters. The adapter base unit has
connections for two power feeds, four Ethernet ports, and two adapters on the
front of the unit, and one I/O base connector on the right-hand side of the unit.
The connections for the adapters are commonly referred to as adapter slots.

To mount the 1715-A2A adapter base unit, follow these steps.

1. Place the 1715-A2A adapter base unit onto the DIN rails and position
them toward the left, leaving space for the I/O base units to the right.

2. Secure the adapter base unit onto the DIN rails by sliding the retaining
lever (below the base unit) to the left, as far as it goes, until it latches in
the locked position.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 61

Chapter 2 Installation Instructions

Adapter Base Unit

Retaining Lever

DIN Rails

45246

Install the I/O Base Unit You can install up to three I/O modules on an I/O base unit. The I/O base unit

has an incoming I/O base connector on the left-hand side of the unit, an
outgoing I/O base connector on the right-hand side, and, on the front,
connections for three I/O termination assemblies and three I/O modules. The
locations for each I/O termination assembly and I/O module connectors are
paired, and together represent an I/O module slot.

To mount the 1715-A3IO base unit, follow these steps.

1. Mount each 1715-A3IO base unit onto the DIN rails to the right of the 1715­A2A adapter base unit.

2. Slide the base unit to the left until the joining connectors are fully mated.

62 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

Adapter Base Unit

I/O Base Unit

Retaining Clip

Retaining Clip

DIN Rails

Retaining Lever

Mating

Connector

Retaining Lever

45247

3. Secure the I/O base unit onto the DIN rails by sliding the bottom
retaining lever (below the base unit) as far to the left as it goes until it
latches in the locked position.

4. Insert the retaining clips into the top and the bottom slots to connect the
adapter base unit to the I/O base unit.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 63

Chapter 2 Installation Instructions

I/O Base Unit

Retaining Clip

Retaining Clip

DIN Rails

Retaining Lever

Mating

Connector

45247

32087 M

32088 M

Typical types of end stops.

Install Termination Assembly to I/O Base Unit

5. Attach anchor end stops to the top of the DIN rails once all base units are
mounted.

I/O termination assemblies determine the type of I/O modules that can be
installed in a particular slot. The I/O termination assemblies provide the
mechanism to connect the field wiring specific to the I/O module type to the
back of one or more installed I/O modules. I/O termination assemblies are
available in single-width and double-width varieties. A single-width I/O
termination assembly connects the field wiring to one I/O module slot for
simplex operation, where a double-width I/O termination assembly connects
the field wiring to two I/O module slots for duplex/redundant operation. I/O
termination assemblies can span I/O base unit boundaries, though the I/O
base units must be connected directly. I/O termination assemblies are keyed so

64 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

that only I/O modules appropriate to the termination assembly type can be
installed.

Each redundant I/O subsystem supports a maximum of 24 I/O module slots,
which can be configured with 24 simplex I/O termination assemblies, 12
duplex I/O termination assemblies, or any combination in between.

Once the base units and termination assemblies have been installed, the
insertion and removal of modules does not disturb other electrical
connections.

Mount Termination Assemblies

Termination assemblies connect to I/O base units. A combination of duplex
and simplex Termination Assemblies may be mounted. A duplex Termination
Assembly may be mounted across two I/O base units. The combination that is
used depends on the specific configuration requirements of the system.

To connect termination assemblies to I/O base units, follow these steps.

1. Insert the termination assembly (TA) retaining clip on the back of the
termination assembly into the slot on the I/O base unit.

2. Press in and slide the assembly upward as far as it goes until it locks in
place.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 65

Chapter 2 Installation Instructions

32061 M

3. Make sure the retaining tab clips over the circuit board to secure the TA
in position.

66 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

32061 M

Mount I/O Expansion Cable The expansion cable assembly connects an I/O base unit to another I/O base

unit or to the adapter base unit. It lets extra I/O to be added at another location
(for example, on another DIN rail). The cable is 2 m long and provides
connection for up to 24 I/O modules. The maximum length of an entire bus, or
backplane, (the combination of I/O base units and expansion cables) is 10 m.

The assembly consists of a cable, terminated by multi-way plugs, and a pair of
adapters.

The expansion cable offers these features:

• Two-meter cable length

• Secure with retaining screws and screw cap screws

• Connects all command and response signals and system power

• Screened to reduce emissions

Cable Assembly

The cable assembly consists of an SCSI-3 cable and two ferrites. The ferrites are
snap-on components that reduce resonance emissions.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 67

Chapter 2 Installation Instructions

32080 M

Cable Adapter

32086 M

Cable Adapter

Fit the ferrites 50 mm (1.97 in.) from each end and secure with cable ties either
side of the ferrites.

Table 8 - Cable Assembly

Item Description

1SCSI-3 cable
2 Ferrite
3 Cable-tie

Expansion Cable

The expansion cable has a left cable adapter and a right cable adapter. Connect
one end to the right-hand bus connector of an I/O base (or adapter base) unit.
The other end connects to the left-hand bus connector of an I/O base unit.

Figure 27 - I/O Expansion Cable Adapters

Item Description

1 Cable socket assembly
2SCS1-3 cable
3 Ferrite
4 Cable plug assembly

68 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

32081 M

Expansion cables are available in 2 m (78.74 in.) lengths.

Terminators are not required at the end of the bus (last base unit).

Install Expansion Cable

To install an expansion cable, follow these steps.

Table 9 - Expansion Cable Components

Item Description

1 M3 socket cap screw
2 Cable plug assembly
3 Cable socket assembly
4M3 nut

IMPORTANT

Adapter base units can only be extended from the right side.

Connect to a 1715-A3IO 3-slot I/O Base Unit

1. To extend from the right-hand side of an I/O base unit, insert a cable
plug assembly into the I/O backplane connector.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 69

Chapter 2 Installation Instructions

32081 M

32081 M

32081 M

32081 M

2. When installing the cable on the left side of the base unit, insert a cable
socket assembly into the I/O backplane connector.

3. Insert an M3 nut into the base unit molding assembly as shown.

70 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

Extending from
right hand side

3

2

3

4

1

2

3

4

1

2

32082 M

Cable Plug Assembly

M3 Socket Cap Screw

M3 Socket Cap Screw

M3 Nut

4. Secure the plug or socket assembly by inserting the two M3 socket cap
screws.

5. Tighten the screws with a 2.5 mm Allen wrench.

6. Install the cable end into the plug or socket assembly and tighten the
retaining screws by hand.

7. Fit the cable plug or socket assembly to the other I/O base unit and secure
as in steps 3

and 4.

8. Fit the other end of the cable into the cable plug or socket assembly.

Connect to a 1715-A2A 2-slot Adapter Base Unit

1. When installing the expansion cable from the right-hand side, insert a
cable plug assembly into the 1715-A2A adapter base unit connector.

2. Follow steps 3

, 4, and 5.

3. Insert the cable end into the cable plug assembly and tighten the
retaining screws by hand.

4. Fit the cable socket assembly to the I/O base unit and secure as in steps 4
and 5

.

5. Fit the other end of the cable into the cable socket assembly.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 71

Chapter 2 Installation Instructions

32060 M

Connect cable plug assembly to
the adapter base connector.

Adapter Base Connector

Pwr1

Pwr2

+24V DC

+24V DC

C

o
m
m

o

n

C

o
m
m

o

n

32065 M1

Wire the Adapter The 1715 adapter base unit has a series of screw terminal blocks to terminate

power connections to ease cable installation.

Connect the 24V DC System Power

The 1715 modules are designed to operate from two independent 24V DC
sources with a common return. Power is connected to the two plugs, ‘PWR-1’
and ‘PWR-2’ on the adapter base plate. Power is distributed to the I/O modules
through the base units.

Figure 28 - Connect System Power

ATTENTION: To comply with the CE Low Voltage Directive (LVD), all
connections to this equipment must be powered from a source
compliant with safety extra low voltage (SELV) or protected extra low
voltage (PELV)

72 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

MP-PWR-24V1

OV

MP-PWR-24V2

OV

32125 M

PWR 1

PWR 2

ATTENTION: To comply with UL restrictions, all connections to this
equipment must be powered from a UL Listed source compliant with
Limited Voltage/Current per UL 508.

For each power supply connection, follow these steps.

1. Connect the negative line from the power supply, typically labeled ‘OV’, to
the left-hand terminal.

2. Connect the positive line from the power supply, typically labeled ‘+24V’,
to the right-hand terminal.

3. Apply a minimum tightening torque of 0.5 N•m (0.37 lb•ft) to the
terminal screws.

Table 10 - - Module Power Wiring Sizes

Wiring Attribute Size

Conductor cross section, stranded maximum
Conductor cross section, solid maximum

Stripping length 7 mm (9/32 in.)

2.5 mm

2.5 mm

2

(12 AWG)

2

(12 AWG)

For maximum protection, be sure that the PWR-1 and PWR-2 plugs are
supplied from independent 24V DC sources as in Figure 29

. Only having one
power supply plug connection causes a Rack Status fault status indicator to
illuminate on adapters.

Figure 29 - Independent Power Sources

Wire the Ground Connection

The system can have up to three separate ground systems:

• An AC Safety Ground (sometimes called the ‘dirty ground’) to help
protect you in the event of a fault. The ground stud on the adapter base
unit must be connected to the AC safety ground, along with all exposed
metalwork, such as DIN rails.

• An Instrument Ground (sometimes called the ‘clean ground’ or ‘OV DC
ground’) to provide a good stable OV reverence for the system. Every
signal return must be referenced to the instrument ground, which is
isolated from the AC Safety Ground.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 73

Chapter 2 Installation Instructions

MP-PWR-24V1

OV

MP-PWR-24V2

OV

32125 M

AC Ground Connection Only

• Some field wiring needs shielded (screened) cable. There can be a Shield
Ground and the AC Safety and Instrument Grounds to provide a
common point to terminate cable shields.

Connect the adapter base unit ground stud to the AC safety ground bus bar of
the system:

• Use an M6 lug on the end of the ground wire.

• Place the lug below the second nut on the ground stud between two
washers and use two 10 mm (.039 in.) wrenches to tighten the nuts.

• Use a minimum conductor wire size of 4 mm

Figure 30 - Adapter Base Unit Ground Connection Detail

2

(10 AWG).

Connect Field Wiring Connect the field wiring to the screw terminal blocks on the termination

assemblies.

IMPORTANT

IMPORTANT

The termination assemblies have integral fuses.

You must use safety wiring principles if the applicable standards
for the system require you take precautions to avoid external
short circuits, because the internal diagnostics in the 1715
adapter do not detect external short circuits between channels.
These standards include NFPA-72.

ATTENTION: To comply with the CE Low Voltage Directive (LVD), all
connections to this equipment must be powered from a source
compliant with safety extra low voltage (SELV) or protected extra low
voltage (PELV).

ATTENTION: To comply with UL restrictions, all connections to this
equipment must be powered from a UL. Listed source compliant with
Limited Voltage/Current per UL 508.

74 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

DC

5.11

33113 M

Recommended Circuits for Digital Inputs

These circuits can be used for simplex and duplex configurations of digital
input modules. Fit a fuse in each circuit to help protect the field wiring.

Figure 31 - Standard Input

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 75

Chapter 2 Installation Instructions

DC

5.11

32114 M

Figure 32 - Line Monitored Inputs

Threshold Settings for Line Monitored Field Devices

For information about setting threshold values, see Threshold Values for

Digital Inputs on page 299.

It is recommended that you do a manual calibration drift check every two
years. See Calibration Drift Checks on page 311 .

76 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

Channel 0

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Field
Inputs

Termination
Assembly

Dual
Redundant
System
Power

SYS_24V1

SYS_24V2

SYS_OV

Dual Input
Measurement
Device

Isolated
Power
Supply

Over/Under
Voltage
Protection

PWR

Power
Valid

Isolator

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

Dual Input
Measurement
Device

Isolator

PWR
CMD
RES

PWR

CMD

Input Data

Data Management
FPGA

PWR

Power
Valid

SPI
Flash

PMA Commands
PMB Commands
PM Commands

I/O Command Bus

Response Bus

Front Panel
LEDS

I/O Backplane

Input Data

Module Status

Channel Status

32106 M

Typical Circuit

1715-IB16D Digital Input Module Functional Block Diagram

Figure 33 - 1715-IB16D 16-channel Module Functional Block Diagram

Figure 33 provides a Function Block Diagram of the 1715 digital input module

illustrating the input circuits, isolation circuits, internal power supplies, and
the input data management by the FPGA. Each input signal is routed through a
termination assembly to two input measurement devices. These devices
determine the input status and channel condition and generate the input data
for the ControlLogix controller.

The digital input module receives commands from the adapter and converts
the channel input data into secure digital data packets. Signal power and
isolation circuits separate out each input channel from the rest of the system
and protect the system components from field faults.

The internal isolated power supply from the 24V DC dual redundant system
power inputs produces module power. The isolated power supply provides
power to the module and is protected by over-voltage and undervoltage
detection circuits. Supply voltage monitoring initiates a warning signal and
Power-off Protection mode when a power failure is detected.

Internal diagnostics test the module every application cycle to see whether
values are within the 1%-value fault band, and if appropriate, report a fault.

An independent watchdog arrangement also monitors the module operation
and provides more fault containment by activating a shutdown mechanism if a
fault is detected. For SIL 2 systems the time to active the shutdown mechanism
can be configured in the CRTL on the SIL 2 Safety tab in them module profile

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 77

in RSLogix/Logix Designer. For non-SIL 2 systems it is set at 10 seconds.

Chapter 2 Installation Instructions

+ve

4K99

F1

24V Digital
Field Input
Channel

50 mA Time Lag
Fuse

100

20

-ve

1715-TASIB16D- Termination Assembly

J1/J2

OV Common

500 mV Range

2.5V Range

1715-IB16D Digital Input Module

Power & Signal
Isolator

32101 M

IMPORTANT

If a fault occurs during normal operation in a duplex-configured
system, an input module can be removed and replaced without
disrupting the flow of input data.

The adapter also monitors the input data paths and can detect faults within
each input channel. A visual indication of the module status and individual
channel status is provided by an array of front panel indicators.

The range of termination assemblies can accept one or two input modules.
Each assembly provides passive signal load termination and fuse over-voltage
protection on each input channel. The system provides flexible and scalable
input connectivity through mating termination assemblies with the relevant
number of input modules.

Field Wiring of Digital Input Termination Assemblies

The termination assembly routes each digital input through a circuit. See

Figure 34

over-voltage is applied to the input, the fuse blows. Each digital input signal is
terminated by 5.11 khigh reliability load and is fed to the input circuit of the
input module.

Figure 34 - 1715-TASIB16D Digital Input Termination Assembly Input Circuit

. The input channel is protected with a 50 mA fuse. When an extreme

78 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

TERMINAL IDENTITY

32095-M

J1

16

cc

11

16

J2

FS1 FS2 FS3 FS4 FS5 FS6 FS7 FS8

FS9 FS10

FS11

FS12 FS13 FS14 FS15 FS16

0V 0V CH1

CH2

CH3 CH4

CH5 CH6 CH7

CH8

CH9 CH10

CH11 CH12 CH13

CH14

CH15 CH16

Fuse

Fuse
Holder

Channel -

Channel +

TB1 TB2

CH0 CH1 CH2

CH3

CH4CH5 CH6 CH7 CH8CH9

CH10CH11CH12

CH13

CH14

CH15

FS1 FS3 FS5 FS7

FS2

J1

16

cc cc

11 11

16 16 16

J2 J4

J3

FS4 FS6 FS8

FS9 FS11 FS13 FS15

FS10 FS12 FS14 FS16

1715-TASIB16D Digital Input
Simplex Termination
Assembly

1715-TADIB16D Digital Input
Duplex Termination Assembly

32120 M

Terminal Block Cable Entry This Side

Field Connections This Side

Fuse Cover

Coding Pegs

Coding Pegs

32095

Fuse

OV OV CH0 CH1 CH2

CH3

CH4

CH10 CH11 CH12 CH13 CH14 CH15

CH5 CH6

CH7

CH8

CH9

32115 M

Figure 35 - 1715-TASIB16D and 1715-TADIB16D Digital Input Termination Assemblies

Figure 36 - Connections to 1715-TASIB16D Simplex Nonisolated Digital Input
16-channel Termination Assembly

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 79

Chapter 2 Installation Instructions

TB2

TB1

CH0 - CH1 - CH2- CH3- CH4- CH5- CH6- CH7- CH8- CH9- CH10-CH11-CH12-CH13-CH14- CH15-

CH0+CH1+CH2+ CH3+CH4+CH5+CH6+CH7+ CH8+CH9+CH10+CH11+CH12+CH13+CH14+CH15+

32110 M

Apply a minimum tightening torque of 0.5 N•m (0.37 lb•ft) to the terminal
screws.

Figure 37 - Connections to 1715-TADIB16D Duplex Digital Input 16-channel Termination Assembly

Apply a minimum tightening torque of 0.5 N•m (0.37 lb•ft) to the terminal
screws.

Digital Input Slew Tolerance

It is possible during sustained periods of abnormal input voltage slewing that
channels can be declared faulted as a consequence of diagnostics that are
otherwise designed to verify the channels are operating within their designed
safety accuracy.

To avoid spurious declaration of channel faults, it is necessary to ensure that
the input signal condition satisfies the maximum slew rate criteria that are
defined in the 1715 Redundant I/O System Specifications Technical Data,
publication 1715-TD001. So it can be necessary to condition the input signal
with low-pass filtering.

Field Loop Circuits for Digital Inputs

The recommended digital input field loop circuits for the 1715-IB16D digital
input module are shown on page 75

For line monitored digital input loop circuit wiring and recommended
threshold values, see Appendix B

.

.

Recommended Circuits for Digital Outputs

This circuit is suitable for simplex and duplex configurations of digital output
modules. The two 10 A fuses that are shown are supplied with the adapter in

80 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

46198

the output termination assembly. They help protect all output circuits that are
associated with the particular termination assembly.

ATTENTION: For inductive loads, connect a diode at the actuator to
protect the adapter against back EMF.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 81

Chapter 2 Installation Instructions

VFIELD 1

VFIELD 2

Response Bus

24V
FIELD
POWER

Response

Command A,B,C

I/0 Command Bus

I/0 Backplane

VFIELD
OV RTN

Power
Combiner

Isolated
Backplane
Interface

PWR

Power
Valid

PWR

Power
Valid

Response

Command

Command

Dual
Redundant
System
Power

SYS_24V1

SYS_24V2

SYS_OV

Isolated
Power
Supply

Over/Under
Voltage
Protection

PWR

Power
Valid

LED Array

Front Panel

Channel
Status

Module
Status

VREF

Termination
Assembly

CH0 CH7

Transient
Suppression

VMON B

VMON A

Output Control

Output Control

Reverse Voltage
Blocking

IMON B

IMON A

VREF

Data Management
& Output Switch
Control A

PWR Feed Combiner Drives

SPI
Flash

Response

Combined Power Feed

Termination
Assembly

Data Management
& Output Switch
Control B

32107 M1

1715-OB8DE Digital Output Module FBD

Figure 38 - 1715-OB8DE Functional Bock Diagram (FBD)

See Figure 38. Two independent output switch control units control the field
output channel. The field output circuitry is galvanically isolated from the
processor input commands and response lines by an isolated interface circuit.
This architecture helps protect the system processors from faults in the output
control circuits of the module and possible field device faults.

The internal isolated power supply produces module power, which the dual
redundant system power inputs supply. Over- and undervoltage protection is
applied to the module internal power supply outputs.

Command packets are received from the processor module via the EtherNet/IP
network. The output switch control units decode and vote the output data that
is addressed to them and set the output FET switches accordingly. The output
voltages are produced from the 24V DC field power input voltages by a power
combiner circuit. Each output channel has a pair of FET switches arranged in a
series that are independently controlled. Load current and voltage monitoring
is provided for each switch. Output channel protection makes sure that the
output circuit is switched off when the channel load current exceeds a safe
limit.

82 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

TEST

Ov V1+ Ov V2+ O v V1+ Ov V2+

CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7

TB1 TB2 TB3 TB4

J1

FH1 FH2

TB1 TB2 TB3 TB4

J1 J2

cc

Ov

CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7

V1+ Ov V1+Ov V2+ Ov V2+

FH1

FH2

1715-TASOB8DE
Digital Output Simplex
Terminat ion Asse mbly

32093 M

1715-TAD0B8DE

Digital Output Duplex

Termination Assembly

32121 M

Field Connections This Side

Field Connections This Side

Coding Pegs

Coding
Pegs

10 A Fuse

Fuse

A reverse voltage protection circuit makes sure that externally applied voltages
to any output channel do not generate current flow backwards into the module
outputs.

In Duplex redundant mode, the two fail-safe output switches per channel are
combined in a parallel arrangement so that they automatically form a fault­tolerant output configuration. In this configuration, removal and of an output
module is possible without any disruption to a live system.

The module has a range of self-checking functionality. Short circuit and open
circuit line monitoring is provided on all outputs. In addition, each output
channel is tested and checked for ‘stuck-on’ and ‘stuck-off’ conditions on the
output switch pairs. The 'stuck-on'/'stuck-off' test is performed on one 1715­OB8DE module per minute.

Field Wiring of Digital Output Termination Assemblies

The 1715-TASOB8DE and 1715-TADOB8DE consist of a simple PCB, screw
termination blocks (16 terminals), two 10A fuses with a plastic fuse cover,
coding pegs, field terminal connectors and connectors to connect the module
to the command, and response buses.

Figure 39 - 1715-TASOB8DE and 1715-TADOB8DE Digital Output Termination Assemblies

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 83

Chapter 2 Installation Instructions

OV OV OV

V1

+

+

V2

V1 +

V2 +

OV

To
Next
TA
(if tted)

TB1 TB2 TB3 TB4

CH0 CH2 CH4 CH6

CH1 CH3 CH5 CH7

32105 M DO TA Field

VFIELD1+24V DC

VFIELD2+24V DC

VFIELD RTN OV

DO CH0
DO CH1
DO CH2
DO CH3

DO CH4
DO CH5
DO CH6
DO CH7

F2

F1

Digital Output Module
Fail Safe Channel
Array

32103 M DO Simplex
Output Connections

Figure 40 - Connections to 1715-TASOB8DE and 1715-TADOB8DE Digital Output Termination Assembly
8-channel Simplex/Duplex

Apply a minimum tightening torque of 0.5 N•m (0.37 lb•ft) to the terminal
screws.

The 24V DC field voltages VFIELD 1 and VFIELD 2, used by the output module
for the output field voltages, are connected at the terminal blocks and fed via
two replaceable 10 A fuses, F1 and F2. These fuses give protection for the output
module against field faults. Field OV (VFIELD RTN) is also routed from the
output module connectors to the terminal block.

Figure 41 - 1715-TASOB8DE Digital Output Simplex Termination Assembly Connections

84 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

VFIELD1

+24V DC

VFIELD2

+24V DC

VFIELD RTN

OV

Fuse F2

Fuse F1

Digital Output

Fail Safe Channel

Array

Connector J1

DO Module

Digital Output

Fail Safe Channel

Array

Connector J2

DO Module

DO CH0
DO CH1
DO CH2
DO CH3

DO CH4
DO CH5
DO CH6
DO CH7

33004 M DO Duplex
Output Connections

OV OV OV

V1

+

+

V2

V1 +

V2 +

OV

To
Next
TA
(if tted)

TB1 TB2 TB3 TB4

CH0 CH2 CH4 CH6

CH1 CH3 CH5 CH7

32105 M DO TA Field Wiring

Figure 42 - 1715-TADOB8DE Digital Output Duplex Termination Assembly Connections

Figure 43 - Digital Output Termination Assembly Field Wiring

Digital Output Slew Tolerance

It is possible during sustained periods of abnormal field supply or output
signal condition slewing that channels can be declared faulted as a
consequence of diagnostics that are otherwise designed to verify the channels
are operating within their designed safety accuracy.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 85

Chapter 2 Installation Instructions

DC

DC

33002 M

Important: For inductive loads, a back EMF protection diode is fitted at the load.

To avoid spurious declaration of channel faults, it is necessary to ensure that
the field supply voltage and output signal condition satisfies the maximum
slew rate criteria that are defined in the 1715 Redundant I/O System
Specifications Technical Data, publication 1715-TD001

.

Field Loop Circuits for Digital Outputs

The field loop circuit for a digital output is shown in Figure 44.

IMPORTANT

The field power 5A fuses comply with UL508 requirements. The
5A fuses are No. 396/TE5 5A time lag fuse; UL 248-14, 125 V,T
Leadfree; manufactured by Littelfuse.

• You can use Class 2 power supplies for the +24V DC field voltage
instead of the two 5A fuses. The NEC defines Class 2 as providing
less than 100 watts (at 24V).

• When digital output modules are configured as a redundant pair,
the minimum load current that is required for channels with line
monitoring is 20 mA.

Figure 44 - Digital Output (Simplex or Duplex) Field Loop Circuit

Recommended Circuits for Analog Inputs

This section describes the layout for analog inputs.

86 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

Channel 0

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Field
Inputs

Termination
Assembly

Dual
Redundant
System
Power

SYS_24V1

SYS_24V2

SYS_OV

Dual Input
Measurement
Device

Isolated
Power
Supply

Over/Under
Voltage
Protection

PWR

Power
Valid

Isolator

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

PWR
CMD
RES

Dual Input
Measurement
Device

Isolator

PWR
CMD
RES

PWR

CMD

Input Data

Data Management
FPGA

PWR

Power
Valid

SPI
Flash

PMA Commands
PMB Commands
PM Commands

I/O Command Bus

Response Bus

Front Panel
LEDS

I/O Backplane

Input Data

Module Status

Channel Status

32106 M Function Block Diagram

Typical Circui t

1715-TASIF16 Analog Input Termination Assembly Functional Block Diagram

Figure 45 is the diagram for the analog input termination assembly.

Figure 45 - 1715-Analog Input Termination Assembly Functional Block

Each input signal is routed through the termination assembly to two input
measurement devices. These devices determine the input status and channel
condition and generate the input data for the controller.

Signal and power isolation circuits separate each input channel from the rest
of the system, thus protecting the system components from field faults.

The internal isolated power supply from the 24V DC dual redundant system
power inputs produces module power. The isolated power supply provides
power to the module and is protected by over-voltage and undervoltage
detection circuits. Supply voltage monitoring initiates a warning signal and
Power-off Protection mode when a power failure is detected.

Internal diagnostics, which the adapter controls, test the module at routine
intervals of 50…100 ms. An independent watchdog arrangement also monitors
the module operation and provides more fault containment by activating a
shutdown mechanism when a fault is detected.

IMPORTANT

If a fault occurs during normal operation in a duplex configured
system, a faulted input module can be removed and replaced
without disrupting the input signals to a live system.

Use extreme caution when removing and inserting I/O modules
under power because bending or damaging the pins can fault the
system.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 87

Chapter 2 Installation Instructions

Shield

Required

Terminal

Blocks

OV

Termination

Assembly

+24V DC

4…20 mA

2-Wire Analog Input

50 mA

120Ω

32116 M

F1

The module also monitors the input data paths and can detect faults within
each input channel. A visual indication of the module status and individual
channel status is provided by an array of front panel indicators and can be
connected to tags within the Studio 5000 Logix Designer® application.

The termination assemblies can accept one or two input modules. Each
termination assembly provides passive signal load termination and over­voltage protection for each input channel. The system provides flexible input
connectivity by mating specific termination assemblies with the relevant
number of input modules.

Field Loop Circuits for Analog Inputs

These circuits can be used for simplex and duplex configurations of analog
input modules. Fit a suitably rated fuse,“F1” in each circuit to help protect the
field wiring, terminal block and 4mA -20mA current generator.

This field loop connection method is used for two-wire field devices.

Figure 46 - Two-wire Analog Input Field Loop Circuit

88 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

This field loop connection is used for three-wire analog field devices. Fit a
suitably rated fuse, “F2” in each circuit to help protect the field wiring, terminal
block and 4mA -20mA current generator.

Figure 47 - Three-wire Analog Input

Shield

Required

Terminal

Blocks

OV

Termination

Assembly

+24V DC

4…20 mA

3-Wire Analog Input

50 mA

120 Ω

32117 M

F2

Shield

Required

Terminal

Blocks

OV

Termination

Assembly

-V

+V

4…20 mA

4-Wire Analog Input

50 mA

120 Ω

32118 M

F3

Chapter 2 Installation Instructions

This field loop connection method is used for four-wire analog field devices.
Fit a suitably rated fuse, “F3” in each circuit to help protect the field wiring,
terminal block and 4mA -20mA current generator.

Figure 48 - Four-wire Analog Input

Field Wiring of Analog Input Termination Assemblies

The termination assembly routes each analog input through a circuit similar to
that shown in Figure 49

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 89

. The input channel is protected with a 50 mA fuse.

Chapter 2 Installation Instructions

Input

Circuit

Input

Circuit

Ch. 0…15

+ve

F1 50 mA

100R

2.5V

500mV

0V

20R

-ve

Analog Input Module

Termination Assembly

32111 M

When an extreme over voltage is applied to the input, the fuse blows. Each
analog input channel is terminated using a pair of high accuracy resistors
presenting a combined termination resistance of 120 Ω. The input module
monitors the channel current by measuring the voltage drop across each
resistor. The fuses have a plastic fuse cover that must be kept in the closed
position during normal operation. Standard field wiring connections are
made at the terminal blocks on the termination assembly.

With a simplex termination assembly, the input signals are routed to one input
module. In duplex configurations, they are routed in parallel to two modules.

Figure 49 - Analog Input Termination Assembly Input Circuit

IMPORTANT

These resistors must be considered as part of the field loop
circuit. Each channel has a 50 mA fuse to prevent component
damage in over-current situations.

When an analog input module is configured as dual, the analog field loop that
is connected to channel 0 is automatically fed to both modules. The system
automatically votes the data from the input modules so that you have only one
value that is presented to the application. The application program is
presented with channel 0 and channel 1 values in a fault tolerant manner so
that if either input module is lost, both values are still available to the
application program.

90 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

Fuse

Fuse
Holder

Channel -

Channel +

TB1 TB2

CH0 CH1 CH2

CH3

CH4CH5 CH6 CH7 CH8CH9

CH10CH11CH12

CH13

CH14

CH15

FS1 FS3 FS5 FS7

FS2

J1

16

cc cc

11 11

16 16 16

J2 J4

J3

FS4 FS6 FS8

FS9 FS11 FS13 FS15

FS10 FS12 FS14 FS16

FH1

FH2

FH7

FH6

FH5

FH4

FH3

FH9

FH8

FH10

FH16

FH15

FH14

FH13

FH12

FH11

FH1

F1

OV OV CH0

CH1 CH2 CH3

CH4 CH5 CH6 CH7 CH8 CH9

CH10 CH11 CH12 CH13 CH14 CH15

TB1

TB2

J1

J2

16

16

11

1715-TADIF16

Analog Input Duplex

Termination Assembly

1715-TASIF16

Analog Input Simplex

Termination Assembly

45238

32120 M

Terminal Block Cable This Side

Field Connections This Side

Fuse Cover

Fuse Covers

Coding Pegs

Coding
Pegs

Figure 50 - 1715-TASIF16 and 1715-TADIF16 Analog Input Termination Assemblies

Analog Input Slew Tolerance

It is possible during sustained periods of abnormal input current slewing that
channels can be declared faulted as a consequence of diagnostics that are
otherwise designed to verify the channels are operating within their designed
safety accuracy.

To avoid spurious declaration of channel faults, it is necessary to ensure that
the input signal condition satisfies the maximum slew rate criteria that are
defined in the 1715 Redundant I/O System Specifications Technical Data,
publication 1715-TD001. So it can be necessary to condition the input signal
with low-pass filtering or sensor slew rate configuration.

Analog Input Module Field Devices

If there are two field devices, you normally connect them to two channels of a
fault tolerant pair of modules, for example to channel 0 and to channel 1.

The two input values (0 and 1) then must be voted by using logic or a function
block in the application program. This is accomplished by taking either the
lowest or highest value, depending on the application. The other option is to
use the two values in two simplex input modules, for example, both using
channel 0. In this case, the values must still be voted in the application
program in the same way as previously stated, but the system has less fault
tolerance, as the loss of one module removes one of the inputs.

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Chapter 2 Installation Instructions

OV OV CH0 CH1 CH2

CH3

CH4

CH10 CH11 CH12 CH13 CH14 CH15

CH5 CH6

CH7

CH8

CH9

32115 M

TB2

TB1

CH0 - CH1 - CH2- CH3- CH4- CH5- CH6- CH7- CH8- CH9- CH10-CH11-CH12-CH13-CH14- CH15-

CH0+CH1+CH2+ CH3+CH4+CH5+CH6+CH7+ CH8+CH9+CH10+CH11+CH12+CH13+CH14+CH15+

32110 M

Figure 51 - Connections to 1715-TASIF16 Simplex Nonisolated Analog Input Termination Assembly-16­channel

Apply a minimum tightening torque of 0.5 N•m (0.37 lb•ft) to the terminal
screws.

Figure 52 - Connections to 1715-TADIF16 Duplex Isolated Analog Input Termination Assembly

Apply a minimum tightening torque of 0.5 N•m (0.37 lb•ft) to the terminal
screws.

HART Secondary Master

92 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

The HART Secondary Master is a hand held monitor/controller used by field
engineers to check and reconfigure the settings of field equipment. In order
that the Rockwell modules interface and operate with this equipment an
additional 120

Ω resistor assembly is required in the connecting circuit.

Chapter 2 Installation Instructions

Shield

Required

Terminal

Blocks

OV

Termination

Assembly

+24V DC

4…20 mA

2-Wire Analog Input

50 mA

120Ω

HART
Secondary Master

120 Ω

IMPORTANT

It is the responsibility of the Installation Engineer to ensure that
the HART secondary Master is correctly installed. information
regarding HART equipment may be obtained from the HART
website.

http://en.hartcomm.org/
http://en.hartcomm.org/hcp/tech/aboutprotocol/

aboutprotocol_how.html

Figure 53 - Connections for 120 Ω Resistor & Secondary Master

Figure 53 above shows the addition of the 120 Ω resistor and HART Secondary

Master to the Two-wire Analog Input Field Loop Circuit shown in Figure 46

The above circuit can be accomplished by connecting the secondary Master
and 120
on the terminal block as shown in Figure 54

Ω resistor assembly to the 0 V terminal and required channel terminal

below.

.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 93

Chapter 2 Installation Instructions

Fuse

Fuse
Holder

Channel -

Channel +

TB1 TB2

CH0 CH1 CH2

CH3

CH4CH5 CH6 CH7 CH8CH9

CH10CH11CH12

CH13

CH14

CH15

FS1 FS3 FS5 FS7

FS2

J1

16

cc cc

11 11

16 16 16

J2 J4

J3

FS4 FS6 FS8

FS9 FS11 FS13 FS15

FS10 FS12 FS14 FS16

120 Ω

HART

Secondary Master

Field Connections This Side

FH1

FH2

FH7

FH6

FH5

FH4

FH3

FH9

FH8

FH10

FH16

FH15

FH14

FH13

FH12

FH11

FH1

F1

OV OV CH0

CH1 CH2 CH3

CH4 CH5 CH6 CH7 CH8 CH9

CH10 CH11 CH12 CH13 CH14 CH15

TB1

TB2

J1

J2

16

16

11

1715-TADIF16

Analog Input Duplex

Termination Assembly

1715-TASIF16

Analog Input Simplex

Termination Assembly

45238

32120 M

Terminal Block Cable This Side

Fuse Cover

Fuse Covers

Coding Peg

Coding
Pegs

HART

Secondary Master

120 Ω

0 V

Figure 54 - Connection of 120 Ω Assemblies and Secondary Masters to Terminal Blocks

The left circuit of Figure 54 above represents the secondary master connected
to the Channel 2 terminal of a simplex termination assembly.

The right circuit of Figure 54
to the Channel 9 terminals of a duplex termination assembly.

above represents the secondary master connected

For both circuits the secondary master is powered through a field power
supply unit.

Recommended Wiring for Analog Output Modules

This section describes the wiring for analog outputs.

94 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Chapter 2 Installation Instructions

CH

LOOP-

DAOTA
PCB130861 REV A

LOOP+

TB1

J1 J2 J4

J3

01

TB2

23

TB3

45

TB4

67

32122 M

1715-TADOF8

Analog Output Duplex

Terminat ion Asse mbly

1715-TASOF8
Analog Output Simplex
Termination Assembly

32123 M

Field Connections This Side

Field Connections This Side

J1 J2

cc

CH0 1 2 3 4 5 6 7

Fuse Cover

Fuse Covers

Coding Pegs

Coding Pegs

Field Wiring of Analog Output Termination Assemblies

Figure 55 - 1715-TASOF8 and 1715-TADOF8 Analog Output Termination Assemblies

Analog Output Slew Tolerance

Analog output channel voltage slew is unconstrained with the limits set by the
compliance operating voltage range of the module.

Field Loop Circuit for Analog Outputs

The field loop circuit for an analog output is shown in Figure 56.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 95

Chapter 2 Installation Instructions

System

+24V DC

OV

Termination

Assembly

Analog Output

Module

CH+

CH-

Load

32109 M

Field

+24V DC

OV

Termination

Assembly

Analog Output

Module

CH+

CH-

Load

Figure 56 - 1715-OF8I Analog Output Module Recommended Field Loop Circuit Field Power Circuit

Field Power Circuit for Analog Outputs

An alternative method is shown in Figure 57. The figure shows when the field
power is used to supply the load.

Figure 57 - Field Power Circuit for Analog Outputs

The adapter supports DLR (Ring) and Star topologies. For more details on
topologies, see System Architecture on page 16

IMPORTANT

For wiring details, see Table 11.

Connect the Adapter to the Ethernet Network

96 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

.

Chapter 2 Installation Instructions

32097 M

The adapter has four autosensing 10/100BASE-TX Ethernet ports for
connecting to a local area network through a minimum Cat5e shielded twisted
pair (STP) Ethernet cable. There are two ports for each adapter.

IMPORTANT

The 1715 Redundant I/O System requires the use of a minimum
Cat5e shielded twisted pair (STP) Ethernet cable.

The adapter Ethernet ports are on the 1715-A2A adapter base unit and are
identified in this table.

Table 11 - Allocation of 10/100BASE-TX Ports to Adapters

1715-AENTR Adapter 10/100BASE-TX Ports

Adapter A A1, A2
Adapter B (where present) B1, B2

IMPORTANT

Most network connections use straight-through cables.
Crossover cables are not needed due to the intelligence or
functionality of the switch. If a direct connection is required
from the adapter to the personal computer (for example, during
setup), it can be necessary to use a crossover cable. This
depends on the characteristics of the interface in the personal
computer.

The fixed connectors on the adapter are female RJ45 modular jacks. Use a
minimum Cat5e shielded twisted pair (STP) cable with male RJ45 modular
jacks for network cabling.

Connect the network cables to the sockets on the 1715-A2A adapter base unit.

To connect the adapter to the Ethernet network, follow these steps.

1. Insert the RJ45 modular jack on the cable into the appropriate socket for
each network connection.

2. Make sure that the length of the cable does not exceed 100 m (328 ft).

Module Keying Module keying, or polarization, prevents the wrong module from being

inserted into the wrong base unit. Modules are supplied with coding pegs that
are already fitted, so the modules are already ‘keyed’.

Electronic Keying is used within the Logix Designer application. See

Electronic Keying

on page 100 for more information.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 97

Chapter 2 Installation Instructions

Coding Peg Positions

32062 M

32085 M

Coding Peg Socket

Figure 58 - Module Coding Peg Sockets and Positions

The legend for the coding pegs showing the peg positions is shown on the
lower left of the adapter base unit and on each I/O termination assembly. The
positions are numbered 1…6. The three coding pegs are lettered A, B, and C
with A being on the top. Each peg, or key, is fitted in the base unit so that the
index recess is next to the relevant numbered position. See
shows a photograph of the Adapter Base Unit. Coding peg A is absent.

Table 12 - Allocations of Coding Pegs

Application Key A Key B Key C
1715 Adapter Base Unit Not Available 2 1
1715 Digital Input Termination Assemblies 2 1 1
1715 Analog Input Termination Assemblies (for analog input modules) 2 1 3
1715 Digital Output Termination Assemblies (for digital output modules) 3 1 1

Figure 59, which

98 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Figure 59 - Inserted Coding Pegs for Adapter Base Unit

32062 M

Chapter 2 Installation Instructions

Verify Coding Pegs

To verify that each coding peg, also known as a polarizing pin, is positioned
correctly, follow these steps.

1. Review the diagram on the adapter base unit that shows the six possible
positions for a coding peg.

Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 99

Chapter 2 Installation Instructions

Coding Peg

32063 M

32062 M

2. Examine a coding peg (fitted) and identify the index recess on the
hexagonal flange.

3. See Table 12

and verify that each coding peg is fitted so its index recess is

next to the relevant numbered position.

Electronic Keying Electronic Keying reduces the possibility that you use the wrong device in a

control system. It compares the device that is defined in your project to the
installed device. If keying fails, a fault occurs. These attributes are compared.

Attribute Description

Vendor The device manufacturer.
Device Type The general type of the product, for example, digital I/O module.
Product Code The specific type of the product. The Product Code maps to a catalog number.
Major Revision A number that represents the functional capabilities of a device.

100 Rockwell Automation Publication 1715-UM001J-EN-P - December 2020

Minor Revision A number that represents behavior changes in the device.

The following Electronic Keying options are available.