Rockwell Automation 1755-OF8 User Manual

GuardPLC Controller Systems

Bulletin
User Manual

1753, 1754, 1755

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines
for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1
Automation sales office or online at http://www.rockwellautomation.com/literature/
between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the
wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that
each intended application of this equipment is acceptable.

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.

WARNING

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.

available from your local Rockwell

) describes some important differences

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

Allen-Bradley, Rockwell Automation, GuardPLC, GuardPLC 1200, GuardPLC 1600, GuardPLC 1800, GuardPLC 2000, RSLogix Guard PLUS!, RSNetWorx, RSNetWorx for EtherNet/IP, RSLinx, RSLogix,
RSLogix 5, RSLogix 5000, PLC-5, ControlLogix, FlexLogix, CompactLogix, SLC 500, PanelView, PanelView Plus, VersaView, FLEX I/O, POINT I/O, PanelBuilder 32, Rockwell Software, and
TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

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

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

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

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

Summary of Changes

The information below summarizes the changes to this manual since
the last publication.

To help you find new and updated information in this release of the
manual, we have included change bars as shown to the right of this
paragraph.

For Information About See

Configuring Communication Between the Controller and a
PanelView PLUS Terminal

Updated GuardPLC 1800 specifications 286
Added service life specifications for 1753-OW8 module 294
Updated information on battery replacement Appendix D
Various updates to style and format throughout

205

3Publication 1753-UM001C-EN-P - March 2010 3

Summary of Changes

Notes:

4 Publication 1753-UM001C-EN-P - March 2010

Overview of Safety Controllers

Table of Contents

Preface

Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . 17

Purpose of This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Additional Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Chapter 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Safety Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Response to Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Safe States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

GuardPLC System Hardware . . . . . . . . . . . . . . . . . . . . . . . . 21

GuardPLC 1200 System . . . . . . . . . . . . . . . . . . . . . . . . . 21

GuardPLC 1600 and GuardPLC 1800 System . . . . . . . . . . 22

GuardPLC Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . 23

GuardPLC 2000 System . . . . . . . . . . . . . . . . . . . . . . . . . 25

Communication Capabilities . . . . . . . . . . . . . . . . . . . . . . . . 27

GuardPLC Ethernet Network. . . . . . . . . . . . . . . . . . . . . . 27

EtherNet/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

ASCII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

High-speed Safety Protocol . . . . . . . . . . . . . . . . . . . . . . 29

Modbus RTU Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

PROFIBUS DP Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

OPC Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Installation

Chapter 2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

General Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Mount the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

GuardPLC 1200 Controller . . . . . . . . . . . . . . . . . . . . . . . 32

GuardPLC 1600 and GuardPLC 1800 Controllers,

and Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

GuardPLC 2000 Chassis . . . . . . . . . . . . . . . . . . . . . . . . . 34

GuardPLC 2000 Controller, I/O, and Power Supply . . . . . 36

Communication Connections . . . . . . . . . . . . . . . . . . . . . . . . 38

GuardPLC 1200 Controller . . . . . . . . . . . . . . . . . . . . . . . 38

GuardPLC 1600 and GuardPLC 1800 Controllers . . . . . . . 39

GuardPLC Distributed I/O Modules . . . . . . . . . . . . . . . . 41

GuardPLC 2000 Controller . . . . . . . . . . . . . . . . . . . . . . . 42

Reset Pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

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Table of Contents

General Wiring Considerations

Wire GuardPLC 1600, GuardPLC
1800, and GuardPLC 1200
Controllers

Chapter 3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . 45

Power Supply Considerations . . . . . . . . . . . . . . . . . . . . . . . 45

Ground the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Considerations for Grounding All Controllers . . . . . . . . . 46

GuardPLC 1200 Controller . . . . . . . . . . . . . . . . . . . . . . . 46

GuardPLC 1600 and GuardPLC 1800 Controllers and

Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

GuardPLC 2000 Chassis . . . . . . . . . . . . . . . . . . . . . . . . . 47

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Shield-contact Plate Connections . . . . . . . . . . . . . . . . . . . . . 48

Detailed Wiring Information . . . . . . . . . . . . . . . . . . . . . . . . 48

Chapter 4

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . 49

GuardPLC 1600 and GuardPLC 1800 Controllers . . . . . . . 49

GuardPLC 1200 Controller . . . . . . . . . . . . . . . . . . . . . . . 50

Safety-related Digital Inputs. . . . . . . . . . . . . . . . . . . . . . . . . 50

Safety-related Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . 51

Safety-related Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . 51

High-speed Counters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Wire the GuardPLC 1600 Controller . . . . . . . . . . . . . . . . . . . 53

Safety-related Digital Input Terminals . . . . . . . . . . . . . . . 53

Safety-related Digital Output Terminals. . . . . . . . . . . . . . 54

Wire the GuardPLC 1800 Controller . . . . . . . . . . . . . . . . . . . 54

Safety-related Digital Input Terminals . . . . . . . . . . . . . . . 55

Safety-related Digital Output Terminals. . . . . . . . . . . . . . 56

Safety-related Analog Input Terminals. . . . . . . . . . . . . . . 56

Safety-related High-speed Counter Terminals . . . . . . . . . 58

Wire the GuardPLC 1200 Controller . . . . . . . . . . . . . . . . . . . 58

Lower Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Upper Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Chapter 5

Wire the GuardPLC 2000 Controller
and I/O

6 Publication 1753-UM001C-EN-P - March 2010

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Safety-related Digital Inputs. . . . . . . . . . . . . . . . . . . . . . . . . 61

Safety-related Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . 62

Safety-Related Analog Inputs (1755-IF8) . . . . . . . . . . . . . . . . 62

High-speed Counter Module (1755-HSC) . . . . . . . . . . . . . . . 63

Safety-related Analog Output Module (1755-OF8). . . . . . . . . 64

Current Draw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Wire the 1755-IB24XOB16 Digital I/O Module . . . . . . . . . . . 65

Wire the 1755-IF8 Analog Input Module. . . . . . . . . . . . . . . . 66

Wire 1753-IB16, 1753-OB16, and
1753-IB20XOB8 Modules

Table of Contents

Wire the 1755-OF8 Analog Output Module. . . . . . . . . . . . . . 66

Wire the 1755-HSC Counter Modules . . . . . . . . . . . . . . . . . . 68

Chapter 6

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Safety-related Digital Inputs. . . . . . . . . . . . . . . . . . . . . . . . . 69

Safety-related Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . 70

Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . 70

Wire the 1753-IB16 Input Module . . . . . . . . . . . . . . . . . . . . 71

Safety-related Digital Inputs . . . . . . . . . . . . . . . . . . . . . . 71

Pulse Test Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Wire the 1753-OB16 Output Module . . . . . . . . . . . . . . . . . . 73

Operating Voltage Considerations. . . . . . . . . . . . . . . . . . 73

Safety-related Digital Outputs . . . . . . . . . . . . . . . . . . . . . 73

Wire the 1753-IB20XOB8 Combination Module . . . . . . . . . . 75

Safety-related Digital Inputs . . . . . . . . . . . . . . . . . . . . . . 75

Safety-related Digital Outputs . . . . . . . . . . . . . . . . . . . . . 76

Wire and Configure the
1753-IB8XOB8 Module

Wire and Configure the
1753-IB16XOB8 Module

Chapter 7

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Safety-related Digital Inputs. . . . . . . . . . . . . . . . . . . . . . . . . 77

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Surge on Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . 78

Safety-related Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . 78

Signals for Output Configuration . . . . . . . . . . . . . . . . . . 79

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Pulse Test Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Chapter 8

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Safety-related Digital Inputs. . . . . . . . . . . . . . . . . . . . . . . . . 83

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Safety-related Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . 86

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Monitor for Line Short Line Break . . . . . . . . . . . . . . . . . . . . 91

Line Monitoring for Lamp and Inductive Loads . . . . . . . . 91

Line Monitoring with Reduced Voltage for Resistive,

Capacitive Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Required Signals for Line Monitoring . . . . . . . . . . . . . . . 93

Pulse Test Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Publication 1753-UM001C-EN-P - March 2010 7

Table of Contents

Wire the 1753-IF8XOF4 Analog I/O
Module

Wire the 1753-OW8 Relay Output
Module

Pulse Testing

Chapter 9

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Safety-related Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . 95

Voltage Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Current Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Standard Analog Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Chapter 10

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Safety-related Relay Outputs . . . . . . . . . . . . . . . . . . . . . . . . 99

Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Example: Connecting Actuators to the Outputs . . . . . . . 100

Voltage Supply Considerations. . . . . . . . . . . . . . . . . . . . . . 100

Chapter 11

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Response to OS Configurable Faults. . . . . . . . . . . . . . . . . . 102

Wire for OS Configurable Line Control. . . . . . . . . . . . . . . . 103

GuardPLC 1600 Controller and 1753-IB20XOB8

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

1753-IB16, 1753-IB8XOB8, and 1753-IB16XOB8

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Input Configuration for Pulse Testing. . . . . . . . . . . . . . . . . 105

Chapter 12

High-Speed Counters

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Counter/Decoder Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Counter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Decoder Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Understand Counter Module Configuration . . . . . . . . . . . . 109

Counter Mode/Manual Direction. . . . . . . . . . . . . . . . . . 109

Counter Mode/Direction and Reset . . . . . . . . . . . . . . . . 110

Decoder Mode/Gray Codes . . . . . . . . . . . . . . . . . . . . . 111

Chapter 13

Controller Configuration and
Modes of Operation

8 Publication 1753-UM001C-EN-P - March 2010

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Controller Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Recover From a Failure_Stop . . . . . . . . . . . . . . . . . . . . 116

Controller Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Routine Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Load a Configuration and Routine (in Stop Mode only). . . . 121

Test Mode of the Routine . . . . . . . . . . . . . . . . . . . . . . . . . 122

Use the Control Panel to Monitor
Status

Diagnostics

Table of Contents

Chapter 14

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Resource State Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Safety Parameters Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Statistics Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

P2P (Peer-to-Peer) State Tab . . . . . . . . . . . . . . . . . . . . . . . 127

Distributed I/O Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

HH (High-level High-speed) State Tab . . . . . . . . . . . . . . . . 128

Environment Data Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

OS Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

HSP Protocol Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

EIP Protocol Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Use the Multi Control Panel. . . . . . . . . . . . . . . . . . . . . . . . 132

Control Panel Resource Menu . . . . . . . . . . . . . . . . . . . . . . 135

Control Panel Extra Menu . . . . . . . . . . . . . . . . . . . . . . . . . 136

Chapter 15

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

View Controller Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . 139

Choose Online or Offline Diagnostics . . . . . . . . . . . . . . 141

Filtering Diagnostic Data . . . . . . . . . . . . . . . . . . . . . . . 141

GuardPLC 1200 Controller Status Indicators . . . . . . . . . . . . 142

GuardPLC 1600 and GuardPLC 1800 Controllers and GuardPLC

Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

System Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . 143

Communication Status Indicators . . . . . . . . . . . . . . . . . 144

GuardPLC 2000 Controller Status Indicators . . . . . . . . . . . . 145

Controller Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Routine Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Ethernet Communication Indicators . . . . . . . . . . . . . . . 146

Serial Communication Indicators. . . . . . . . . . . . . . . . . . 147

1755-IB24XOB16 Module Status Indicators . . . . . . . . . . . . . 147

Power Supply and Module Status . . . . . . . . . . . . . . . . . 147

I/O Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

1755-IF8 Analog Input Module Status Indicators . . . . . . . . . 148

1755-OF8 Analog Output Module Status Indicators . . . . . . . 149

1755-HSC Combination High-speed Counter and Output Module

Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Power Supply and Module Status . . . . . . . . . . . . . . . . . 150

I/O Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Chapter 16

Peer-to-peer Communication
Overview

Publication 1753-UM001C-EN-P - March 2010 9

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Peer-to-peer Communication Basics. . . . . . . . . . . . . . . . . . 151

Networking Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Table of Contents

Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

HH Protocol Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Token Group ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Protocol Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Link Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Token Cycle Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Token Alive Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Primary Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Secondary Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Link Mode (Extern) . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Response Time (Extern) . . . . . . . . . . . . . . . . . . . . . . . . 156

Peer-to-peer Protocol Parameters. . . . . . . . . . . . . . . . . . . . 157

Message Response Time (ReponseTime). . . . . . . . . . . . 157

Receive Timeout (ReceiveTMO) . . . . . . . . . . . . . . . . . . 158

Resend Timeout (ResendTMO) . . . . . . . . . . . . . . . . . . . 159

Acknowledge Timeout (AckTMO) . . . . . . . . . . . . . . . . 159

Queue Length (QueueLen). . . . . . . . . . . . . . . . . . . . . . 159

Production Rate (ProdRate) . . . . . . . . . . . . . . . . . . . . . 160

Watchdog Time (WDZ) . . . . . . . . . . . . . . . . . . . . . . . . 160

Worst-case Reaction Time (TR). . . . . . . . . . . . . . . . . . . 160

HH Network Profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Profile I: Fast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Profile II: Medium . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

The None Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Peer-to-Peer Network Profiles . . . . . . . . . . . . . . . . . . . . . . 168

Peer-to-Peer Profile I: Fast & Cleanroom . . . . . . . . . . . . 169

Peer-to-Peer Profile II: Fast & Noisy . . . . . . . . . . . . . . . 170

Peer-to-Peer Profile III: Medium & Cleanroom. . . . . . . . 171

Peer-to-Peer Profile IV: Medium & Noisy . . . . . . . . . . . 172

Peer-to-Peer Profile V: Slow & Cleanroom. . . . . . . . . . . 173

Peer-to-Peer Profile IV: Slow & Noisy . . . . . . . . . . . . . . 174

Chapter 17

Configure Peer-to-Peer
Communication

10 Publication 1753-UM001C-EN-P - March 2010

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Considerations for Using Peer-to-peer . . . . . . . . . . . . . . . . 175

Set Peer-to-Peer Controller Properties . . . . . . . . . . . . . . . . 176

Create a Peer-to-peer Network. . . . . . . . . . . . . . . . . . . . . . 178

Create Token Group(s) . . . . . . . . . . . . . . . . . . . . . . . . 178

Add Controllers to Token Group(s) . . . . . . . . . . . . . . . 179

Configure Token Group(s) . . . . . . . . . . . . . . . . . . . . . . 179

Design the Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Create Peer-to-peer Signals. . . . . . . . . . . . . . . . . . . . . . 180

Use Peer-to-peer System Signals . . . . . . . . . . . . . . . . . . 181

Design the Logic for all Controllers. . . . . . . . . . . . . . . . 182

Table of Contents

Configure Peer-to-peer Communication . . . . . . . . . . . . . . . 184

Define Controller Connections . . . . . . . . . . . . . . . . . . . 184

Assign HH-Network . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Choose a Peer-to-peer Profile. . . . . . . . . . . . . . . . . . . . 186

Define Peer-to-peer Parameters . . . . . . . . . . . . . . . . . . 186

Define The Signals to Exchange Between Each

Controller Connection . . . . . . . . . . . . . . . . . . . . . . . . . 187

Compile and Download . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Compile Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Start Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Network Optimizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Check Routine Timing . . . . . . . . . . . . . . . . . . . . . . . . . 191

Reconfigure Watchdog Time . . . . . . . . . . . . . . . . . . . . 192

Check HH Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Check Peer-to-peer Status. . . . . . . . . . . . . . . . . . . . . . . 194

Reconfigure ResponseTime . . . . . . . . . . . . . . . . . . . . . 195

Reconfigure Receive Timeout . . . . . . . . . . . . . . . . . . . . 197

Introduction to EtherNet/IP
Communication

Chapter 18

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

EtherNet/IP Communication Overview. . . . . . . . . . . . . . . . 199

GuardPLC Controller as an Adapter . . . . . . . . . . . . . . . 199

GuardPLC Controller as a Scanner . . . . . . . . . . . . . . . . 201

Data Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

Software Required to Configure EtherNet/IP

Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Add EtherNet/IP Protocol to the Resource . . . . . . . . . . . . . 203

View the Controller IP Settings . . . . . . . . . . . . . . . . . . . . . 204

Configuring Communication Between the Controller and a

PanelView PLUS Terminal . . . . . . . . . . . . . . . . . . . . . . . . . 205

Set Up FactoryTalk View Studio Machine Edition

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Add Ethernet/IP Protocol to Your Project . . . . . . . . . . . 208

Read Integers from the Controller and Display Them

on the PanelView Plus Terminal . . . . . . . . . . . . . . . . . . 209

Read BOOLs from the GuardPLC Controller and Display

Them on the PanelView Plus Terminal . . . . . . . . . . . . . 210

Writing Integers to the GuardPLC Controller from the

PanelView Plus Terminal . . . . . . . . . . . . . . . . . . . . . . . 212

Writing BOOLs to the GuardPLC Controller from the

PanelView Plus Terminal . . . . . . . . . . . . . . . . . . . . . . . 213

Publication 1753-UM001C-EN-P - March 2010 11

Table of Contents

Use GuardPLC Controller as an
Adapter

Chapter 19

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

Configure the GuardPLC Controller as an Adapter . . . . . . . 215

Configure the Adapter Input Assembly . . . . . . . . . . . . . 215

Configure the Adapter Output Assembly . . . . . . . . . . . . 216

Connect Signals to the Adapter Assemblies . . . . . . . . . . 217

Open a Class 1 Connection from a Logix Controller to the

GuardPLC Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Configure the Logix Controller in RSLogix 5000

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Configure the Type of Connection . . . . . . . . . . . . . . . . 220

Download and Go Online . . . . . . . . . . . . . . . . . . . . . . 225

Monitor Connection Status . . . . . . . . . . . . . . . . . . . . . . 226

Use the Force Editor to Test the Connection . . . . . . . . . 227

Remove or Inhibit a Connection . . . . . . . . . . . . . . . . . . 228

Open a Class 3 Connection from a Logix Controller . . . . . . 228

Configure the GuardPLC Controller Assemblies . . . . . . . 228

Create a Project for the Logix Controller . . . . . . . . . . . . 229

Create Tags to Read and Write Assembly Data . . . . . . . 229

Create Ladder Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . 230

Download and Go to Run . . . . . . . . . . . . . . . . . . . . . . 233

Verify the Data Exchange. . . . . . . . . . . . . . . . . . . . . . . 233

Use a GuardPLC Controller as an Unconnected Adapter . . . 235
Use Unconnected PCCC Messaging from a PLC-5 or

SLC 5/05 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Configure an EtherNet/IP Driver. . . . . . . . . . . . . . . . . . 237

Create an EtherNet/IP Project in RSLogix Programming

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Add a Message Instruction to Your Application Program

Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Use Unconnected CIP Messaging from a PanelView

Standard Terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Create an EtherNet/IP Application . . . . . . . . . . . . . . . . 244

Configure the PanelView Terminal for EtherNet/IP

Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Configure a Write Operation . . . . . . . . . . . . . . . . . . . . 246

Configure a Read Operation . . . . . . . . . . . . . . . . . . . . . 247

Chapter 20

Use the GuardPLC Controller as a
Scanner

12 Publication 1753-UM001C-EN-P - March 2010

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Prepare the GuardPLC Controller for Class 1 Scanner

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Connect the Scanner Signals. . . . . . . . . . . . . . . . . . . . . 250

Disable Scanner Function on the Controller . . . . . . . . . 251

Configure the EtherNet/IP Driver . . . . . . . . . . . . . . . . . . . . 252

Communicate with ASCII Devices

Table of Contents

Configure Connections in RSNetWorx for EtherNet/IP

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Open a Connection to a Logix Controller . . . . . . . . . . . . . . 260

Create a Producing Data Tag . . . . . . . . . . . . . . . . . . . . 260

Configure Connections from the GuardPLC Controller

to the Logix Controller . . . . . . . . . . . . . . . . . . . . . . . . . 261

Save the Connection Configuration in the GuardPLC

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

Remove the Connection Configuration. . . . . . . . . . . . . . . . 263

Chapter 21

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

Connect the Controller to an ASCII Device. . . . . . . . . . . . . 265

Connect to a GuardPLC 1200 Controller . . . . . . . . . . . . 265

Connect to a GuardPLC 1600 or 1800 Controller . . . . . . 266

Connect to a GuardPLC 2000 Controller . . . . . . . . . . . . 267

Configure the ASCII Serial Port . . . . . . . . . . . . . . . . . . . . . 268

Connect Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269

ASCII Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

ASCII Master - Request. . . . . . . . . . . . . . . . . . . . . . . . . 270

ASCII Slave - Controller Response. . . . . . . . . . . . . . . . . 271

Data Type Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Communicate with Modbus and
Profibus Devices

Specifications

Chapter 22

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Modbus RTU Slave Protocol . . . . . . . . . . . . . . . . . . . . . . . 275

Connect the Controller to a Modbus Device . . . . . . . . . 276

Configure the Modbus Serial Port . . . . . . . . . . . . . . . . . 276

Connect Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

Profibus DP Slave Protocol . . . . . . . . . . . . . . . . . . . . . . . . 279

Connect the Controller to a Profibus DP Device . . . . . . 279

Configure the Profibus DP Serial Port . . . . . . . . . . . . . . 280

Connect Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

Configure the Profibus Master . . . . . . . . . . . . . . . . . . . 282

Appendix A

GuardPLC 1200 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 283

GuardPLC 1600 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 284

GuardPLC 1800 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 286

Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

1753-IB16 Input Module. . . . . . . . . . . . . . . . . . . . . . . . 288

1753 Combination I/O Modules . . . . . . . . . . . . . . . . . . 290

1753-IF8XOF4 Analog Combination Module . . . . . . . . . 292

1753-OW8 Relay Output Module . . . . . . . . . . . . . . . . . 294

1753-OB16 Output Module. . . . . . . . . . . . . . . . . . . . . . 296

Publication 1753-UM001C-EN-P - March 2010 13

Table of Contents

System Signal Variables

GuardPLC 2000 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 297

GuardPLC 2000 Distributed I/O Modules . . . . . . . . . . . . . . 298

1755-IB24XOB16 Digital I/O Module . . . . . . . . . . . . . . 298

1755-IF8 Analog Input Module . . . . . . . . . . . . . . . . . . . 299

1755-OF8 Analog Output Module . . . . . . . . . . . . . . . . . 300

1755-HSC High Speed Counter Module. . . . . . . . . . . . . 302

GuardPLC 2000 Power Supply . . . . . . . . . . . . . . . . . . . . . . 303

Appendix B

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305

Programming Controller Data . . . . . . . . . . . . . . . . . . . . . . 305

I/O Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Digital I/O Module Variables (AB-DIO) for

GuardPLC 1200 and 2000 Controllers . . . . . . . . . . . . . . 307

Analog Input Module Variables (AB-AI) for

GuardPLC 2000 Controller . . . . . . . . . . . . . . . . . . . . . . 309

Analog Output Module Variables (AB-AO) for

GuardPLC 2000 Controller . . . . . . . . . . . . . . . . . . . . . . 311

High-Speed Counter Variables For GuardPLC 1200 and

2000 Controllers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Module Variables for GuardPLC 1600 and 1800

Controllers and Distributed I/O . . . . . . . . . . . . . . . . . . 315

Digital Input Module Variables for GuardPLC 1600

Controllers and Distributed I/O . . . . . . . . . . . . . . . . . . 316

Digital Output Module Variables for

GuardPLC 1600/1800 Controllers, 1753-IB20XOB8

Modules, and 1753-OB16 Modules . . . . . . . . . . . . . . . . 318

Digital Output Parameters for 1753-IB8XOB8

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319

Digital Output Parameters for 1753-IB16XOB8

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

Digital Relay Output Parameters for 1753-OW8

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322

Analog Input Signals for 1753-IF8XOF4 Modules . . . . . . 323

Analog Output Signals for 1753-IF8XOF4 Modules . . . . 325

Counter Module Variables for GuardPLC 1800

Controllers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

Digital (Analog) Input Variables for the GuardPLC 1800

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328

14 Publication 1753-UM001C-EN-P - March 2010

Wiring Examples

Replacing the Back-up Battery

Table of Contents

Appendix C

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

GuardPLC 1600 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 332

GuardPLC 1800 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 333

1753-IB16 Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

1753-OB16 Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

1753-IB20XOB8 Module . . . . . . . . . . . . . . . . . . . . . . . . . . 336

1753-IB8XOB8 Modules . . . . . . . . . . . . . . . . . . . . . . . . . . 337

1753-IB16XOB8 Modules. . . . . . . . . . . . . . . . . . . . . . . . . . 338

1753-OW8 Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

1753-IF8XOF4 Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

GuardPLC 1200 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 341

1755-IB24XO16 Digital Input/Output Modules . . . . . . . . . . 342

1755-IF8 Analog Input Modules . . . . . . . . . . . . . . . . . . . . . 343

1755-OF8 Analog Output Modules . . . . . . . . . . . . . . . . . . . 343

1755-HSC High Speed Counter Module . . . . . . . . . . . . . . . 344

Appendix D

Preventing Electrostatic Discharge . . . . . . . . . . . . . . . . . . . 345

GuardPLC 1200 Controllers . . . . . . . . . . . . . . . . . . . . . . . . 346

GuardPLC 2000 Power Supply . . . . . . . . . . . . . . . . . . . . . . 347

Battery Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347

Index

Publication 1753-UM001C-EN-P - March 2010 15

Table of Contents

16 Publication 1753-UM001C-EN-P - March 2010

Preface

Who Should Use This Manual

Purpose of This Manual

Use this manual if you are responsible for designing, installing,
programming, or troubleshooting control systems that use GuardPLC
controllers.

Personnel responsible for installation, programming, operation, and
troubleshooting of safety-related controllers must be familiar with
relevant safety standards for programmable electronic systems (PES).

The manual only briefly describes the safety concept of the GuardPLC
family of controllers. Its purpose is to provide information on
installing and operating your controller system.

For detailed information on the safety policy regarding GuardPLC
controllers, including information on the controller’s central functions,
input and output channels, operating system, application program
safety and regulations for use, refer to the GuardPLC Controller
Systems Safety Reference Manual, publication 1753-RM002

For procedural information on programming and configuring
GuardPLC Controller Systems with RSLogix Guard PLUS! programming
software, refer to Using RSLogix Guard PLUS! Software with GuardPLC
Controllers, publication 1753-PM001

.

.

Additional Resources

The table on the following page lists documents that contain
additional information concerning Rockwell Automation GuardPLC
products.

You can view or download publications at

http://www.rockwellautomation.com/literature

of technical documentation, contact your local Rockwell Automation
distributor or sales representative.

. To order paper copies

17Publication 1753-UM001C-EN-P - March 2010 17

Preface Preface

Resource Description

Using RSLogix Guard PLUS! Software with GuardPLC
Controllers Programming Manual, publication 1753-PM001

GuardPLC Controller Systems Safety Reference Manual,
publication 1753-RM002

DeviceNet Safety Scanner for GuardPLC Controllers User
Manual, publication 1753-UM002

DeviceNet Safety I/O User Manual, publication

1791DS-UM001

GuardPLC Certified Function Blocks Safety Reference Manual,
publication 1753-RM001

EtherNet/IP Performance and Application Guide, publication

ENET-AP001

Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1

Application Considerations for Solid-State Controls,
publication SGI-1.1

National Electrical Code - Published by the National Fire
Protection Association of Boston, MA.

Provides procedural information for programming GuardPLC Controller
Systems Using RSLogix Guard PLUS! Programming Software

Contains in-depth information on the safety concept of GuardPLC
controller systems, including the DeviceNet Safety Scanner for GuardPLC
Controller.

Provides information on installing, configuring, and operating a DeviceNet
Safety Scanner in a GuardPLC application

Provides information on operating 1791DS DeviceNet Safety I/O Modules

Provides information on using Certified Function Blocks in your GuardPLC
safety application

Information on EtherNet/IP protocol

In-depth information on grounding and wiring Allen-Bradley
programmable controllers

A description of important differences between solid-state programmable
controller products and hard-wired electromechanical devices

An article on wire sizes and types for grounding electrical equipment

18 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

Overview of Safety Controllers

Topic Page

Safety Concept 19
Safe States 21
GuardPLC System Hardware 21
Communication Capabilities 27

1

Safety Concept

GuardPLC controllers feature a fail-safe CPU according to IEC 61508
(SIL 3) and ISO 13849-1 (PLe/Cat. 4). Faults that cause loss of safety
function are detected within the safety time you specify. Faults that
cause loss of safety function only in combination with another fault,
are detected at least within the multiple error occurrence time (24
hours).

This results in these requirements for the safety concept:

• You specify the safety time and the watchdog time. The multiple

error occurrence time is preset to 24 hours.

• Even upon the detection of an error, the controller continues to

react in a safety-related way.

• Faulty input signals (for example, incorrectly transmitted input

values) do not affect the safe function of the controller. Faulted
input signals have a 0 value.

• An error in a non-safety-related module does not affect the

safety of the controller.

• The failure of the controller has no effect on the safety of other

safety-related modules.

For more information on the safety concept, refer to the GuardPLC
Controllers Safety Reference Manual, publication

19Publication 1753-UM001C-EN-P - March 2010 19

1753-RM002.

Chapter 1 Overview of Safety Controllers

Response to Faults

Type of I/O Error Controller Behavior

Permanent If an error occurs at an I/O point, only this I/O point is considered faulty and not the entire module.

In case of faulty input points, ‘0’ is assumed to be the safe value. Faulty output channels are de-energized. If it
is not possible to de-energize a single point, the entire module is considered to be faulty, the entire module is
de-energized, and the corresponding error status is set. The controller reports the error to the user program. If
the entire module cannot be de-energized, the controller goes to Failure_Stop.

Transient A transient error is an error that occurs in an I/O module and then disappears by itself. If a transient error

occurs, the module performs a self test. If the test is successful, the status of the I/O module is set to ‘good’
and the module’s normal function continues.

In the process, the GuardPLC controller performs a statistical evaluation of the frequency of errors. The I/O
module is permanently set to ‘faulty’ if the pre-set error frequency is exceeded. In this case, the module does
not resume its normal function after the error has disappeared. To resume normal function, you must cycle
power or change the controller to Stop and then Run.

If an error persists for a period of time exceeding that of the multiple error occurrence time (24 hours), the I/O
module is permanently set to ‘faulty’ and does not continue normal function after the disappearance of the
error. The I/O module can only resume normal function after you cycle power or Stop/Start the controller.

For faulty modules, the controller uses safe values (0, LOW).

Controller Upon the detection of an error, the controller goes to Failure_Stop and all output channels are set to the safe

state (value = 0).

In some cases in which a Failure_Stop occurs, a power cycle will not enable normal operation. A manual reset
from Stop to Run, using RSLogix Guard PLUS! software, is required. Cat. 4 faults typically require manual
resets.

An error in the user program is not considered an error of the controller.

The controller also monitors the timing and consistency of the:

• hardware self-tests and software self-tests of the controller.

• cycle of the user program.

• processing of the I/O signals including I/O tests.

• run cycle of the controller.

• transition from Run to Stop.

20 Publication 1753-UM001C-EN-P - March 2010

Overview of Safety Controllers Chapter 1

Safe States

GuardPLC System Hardware

Inputs

The safe state of an input is indicated by a 0 signal being passed to
the user program logic. When a fault occurs, the inputs are switched
off (0).

Outputs

An output is in the safe state when it is de-energized. In the event of a
fault, all outputs are switched off. This includes faults in Ethernet
communication.

GuardPLC 1200 System

The GuardPLC 1200 controller is a compact system consisting of a
CPU, watchdog, and on-board digital I/O. The GuardPLC 1200
controller features 20 digital inputs, 8 digital outputs, and 2
high-speed counters. An RS-232 serial port supports ASCII
communication and an Ethernet port provides safety-related
communication. A user-supplied 24V DC power supply is required.
See page

45 for power supply connections.

GuardPLC 1200 Controller

Upper Terminal Block

Back-up Battery
Compartment

ASCII Serial Port

Lower Terminal Block

PLC

1200

Ethernet Port

(on Bottom of Controller)

RJ-45 Port

Port for
Factory
Use Only

Ethernet Dongle
Required

Publication 1753-UM001C-EN-P - March 2010 21

Chapter 1 Overview of Safety Controllers

GuardPLC 1600 and GuardPLC 1800 System

GuardPLC 1600 Controller

RJ-45 Ethernet Ports

Voltage Supply

Connection

RS-485 Serial Ports

(See Page 23)

(on Top of Controller)

Digital Outputs

RJ-45 Ethernet Ports

Voltage Supply

Connection

RS-485 Serial Ports

(See Page 23)

RJ-45 Ethernet Ports (on Bottom of Controller)

RJ-45 Ethernet Ports (on Bottom of Controller)

Digital Inputs

GuardPLC 1800 Controller

(on Top of Controller)

Digital Outputs

Analog Inputs

Digital Inputs

High Speed

Counter

The GuardPLC 1600 system features 20 digital inputs and 8 digital
outputs with the addition of optional distributed Safety I/O. The
GuardPLC 1800 system features 24 digital inputs, 8 digital outputs, 8
safety-related analog inputs, and 2 high-speed counters, as well as
optional distributed Safety I/O. The status of inputs and outputs is
indicated via status indicators. A user-supplied 24V DC power supply
is required. See page

45 for information on power supply

requirements.

Each controller features four 10/100BaseT, RJ-45 connectors to
provide safety-related communication via the GuardPLC Ethernet
network to distributed I/O and other GuardPLC controllers, OLE for

(1)

Process Control (OPC) servers

, and with RSLogix Guard PLUS!
programming software. The four connectors and the controller are
connected via an internal Ethernet switch.

(1)

The OPC server is not suitable for safety-related communication.

22 Publication 1753-UM001C-EN-P - March 2010

Overview of Safety Controllers Chapter 1

Three ports are located on the front of the controller, providing these
non-safety-related communication options.

Serial Port
Designation

COMM1
(RS-485)

COMM2 not used
COMM3

(RS-485)

Function

Modbus RTU Slave (1753-L28BBBM or 1753-L32BBBM-8A)
Profibus-DP-Slave (1753-L28BBBP or 1753-L32BBBP-8A) Read/Write

GuardPLC ASCII Protocol (Read-only)/High-Speed Safety Protocol (HSP)

The COMM3 (RS-485) also supports High-Speed Safety Protocol (HSP)
for high-integrity communication with the 1753-DNSI DeviceNet
Safety Scanner.

Refer to the DeviceNet Safety Scanner for GuardPLC Controllers User
Manual, publication 1753-UM002

, for more information.

GuardPLC Distributed I/O

The following modules are available for use with the GuardPLC 1600
controllers, GuardPLC 1800 controllers, and series C GuardPLC 1200
controllers, and with series C GuardPLC 2000 CPUs. Module status is
indicated via status indicators.

Cat. No. Description Inputs Outputs

1753-IB16 Input Module 16 digital (not isolated)

4 pulse test sources
1753-OB16 Output Module NA 16 digital (not isolated)
1753-IB20XOB8 Input/Output

Module

1753-IB8XOB8 Input/Output

Module

1753-IB16XOB8 Input/Output

Module

1753-OW8 Relay Output

Module

1753-IF8XOF4 Analog

Input/Output
Module

20 digital (not isolated) 8 digital (not isolated)

8 digital (not isolated)

2 pulse test sources

16 digital (not isolated)

2 pulse test sources

NA 8 relay

8 analog 4 standard analog

NA

8 positive-switching digital
2 negative-switching digital
(not isolated)

8 two-pole digital
(not isolated)

Publication 1753-UM001C-EN-P - March 2010 23

Chapter 1 Overview of Safety Controllers

1753-IB16 Module

Voltage Supply Connection

123456

123456

1LS+ LS+ LS+L-D1234

LS+ 13 L-14 15 16

19 20 21 22 23 24

19 20 21 22 23 24

24 V DC

RUN

ERROR

PROG

FORCE

FAULT

OSL

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

L-L- L+ L+

24V DC

BL

Digital Inputs

Ethernet Ports

(on Bottom of Module)

Voltage Supply Connection

GuardPLC 1753 Digital I/O Modules

Digital Inputs

789101112

789101112

5L-

678

D1

16 DC Inputs

4 Pulse Test Sources

Pulse Test Sources

13 14 15 16 17 18

13 14 15 16 17 18

9L-

10 11 12

D1

1753-IB16

PO PULSE TEST

L- 1 L-234

25 26 27 28 29 30

25 26 27 28 29 30

Digital Outputs

1753-IB20XOB8 Module

Voltage Supply

(on Bottom of Module)

Connection

L-L- L+ L+

24V DC

24 V DC

RUN

ERROR

PROG

FORCE

FAULT

OSL

BL

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

Ethernet Ports

1753-OB16 Module

Digital

Outputs

123456

123456

1L- L-DO 2 3 4

9L- L-DO 10 11 12

13 14 15 16 17 18

13 14 15 16 17 18

Voltage Supply

Connection

L-L- L+ L+

24V DC

Digital Outputs

Digital

Outputs

789101112

789101112

5L- L-DO 6 7 8

16 DC Outputs

13L- L-DO 14 15 16

19 20 21 22 23 24

19 20 21 22 23 24

1753-OB16

GuardPLC Ethernet

10/100 BaseT

Ethernet Ports

Voltage Supply

Connection

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

1753-IB8XOB8 Module

Pulse Test Sources

123456

L-L- L+ L+

24 V DC

ERROR

PROG

FORCE

FAULT

24V DC

RUN

OSL

BL

PO PULSE TEST

LS+DI1L-234

19 20 21 22 23 24

1LS+ L-S+

Ethernet Ports (on Bottom of Module)

L-L- L+ L+

24V DC

24 V DC

RUN

ERROR

PROG

FORCE

FAULT

OSL

BL

(—)2(—)

1

(on Bottom of Module)

Digital Outputs

789101112 131415161718

248-

1L-2 3 4+ L-

DO-

DO (2A)

Digital Inputs

123456

123456

1L- L-DO 2 3 4

1LS+ LS+ LS+ LS+ LS+L-D1234

13 14 15 16 17 18

5L-678+

DO (2A)

1753-IB8XOB8

8 DC Inputs

8 DC Outputs

LS+DI5L-678

25 26 27 28 29 30

789101112

789101112

(2A)

D1

5L-

678

19 20 21 22 23 24

19 20 21 22 23 2413 14 15 16 23 24

7L- L-DO 8 9 10

D1

9L-

25 26 27 28 29 30

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Voltage Supply

Connection

24 V DC

RUN

ERROR

PROG

FORCE

FAULT

OSL

BL

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

Ethernet Ports (on Bottom of Module)

10 11 12

(2A)

L-L- L+ L+

24V DC

1753-IB20OXB8

13 L-D114 15 16

31 32 33 34 35 36

1753-IB16XOB8 Module

123456 87

S+

DO +-

1
2
3
4
5
6
7
8

LS+ LS+ 1 2 3 4 L-L-

33 34 35 36 37 38 39 40 41 42

20 DC Inputs
8 DC Outputs

17 L-D118 19 20

37 38 39 40 41 42

Pulse Test Sources

11112222

S+ S+ S+ S- S- S- S-

Digital Outputs

91011121314 1615

1- 1+ 2- 2+ 3- 3+ 4+4- 5- 5+ 6- 6+ 7- 7+ 8+8­DO DO

17 18 19 20 21 22 2423 25 26 27 28 29 30 3231

1753-IB16 OXB8

LS+ LS+ 5 6 7 8 L-L- LS+ LS+ 9 10 11 12 L-L- LS+LS+ 13 14 15 16 L-L-

43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

Digital Inputs

PO PULSE TEST

16 DC Inputs
8 DC Outputs

24 Publication 1753-UM001C-EN-P - March 2010

Voltage Supply

Connection

L-L- L+ L+

24V DC

1753-OW8 Module

Relay Outputs

1 2

DO 1

3 4

DO 2

5 6

DO 3



DO5 DO6 DO7 DO8

9 10 11 12 13 14 15 16

1753 Relay Output and Analog I/O Modules

Voltage Supply

Connection

7 8

DO 4

1753-OW8

8 Digital Outputs

L-L- L+ L+

24V DC

GuardPLC Ethernet

10/100 BaseT

<—>2<—>

1

24 V DC
RUN
ERROR
PROG
FORCE

AI

FAULT

T1 I1 L- T2 I2 L-AIT3 I3 L- T4 I4 L-AIT5 I5 L- T6 I6 L-AIT7 I7 L- T8 I8 L-

OSL
BL

1 2 34 5 6 7 8 9101112 13 1415161718 192021222324

Overview of Safety Controllers Chapter 1

1753-IF8XOF4 Module

Safety Analog Inputs

1753-IF8XOF4
8 Analog Inputs
4 Analog Outputs

AO
O1 O2 O3 O4

+-+-+-+-

25 26 27 28 29 30 31 32

STD ANALOG OUTPUTS

Ethernet Ports (on Bottom of Module)

Relay Outputs

Ethernet Ports (on Bottom of Module)

Standard Analog Outputs

GuardPLC 2000 System

The GuardPLC 2000 controller is a modular system consisting of a
controller (1755-L1), which provides central CPU and communication
functions, and a separate power supply and I/O residing in a
GuardPLC 1755-A6 chassis. A maximum of six I/O modules may be
used in a single system.

The GuardPLC 2000 controller has one active RS-232 serial port for
non-safety related communication. It also features an Ethernet port for
configuration and safety-related communication. The lower DB9 port
supports RS-232 ASCII (read-only) communication; the upper port is
inactive.

Publication 1753-UM001C-EN-P - March 2010 25

Chapter 1 Overview of Safety Controllers

GuardPLC 2000 Controller, Power Supply, and I/O Modules

GuardPLC 2000 Power Supply

Ethernet Port

Back-up Battery

Compartment

RS-232 Serial Port

(Inactive)

RS-232 Serial Port

(Active)

GuardPLC 2000

1755-

PB720

GuardPLC 2000

24V

FAULT

3,3V

5V

RESTA RT

1
2
3

FAULT

L+
DC 24V
L-

PS

GuardPLC 2000 I/O Modules

Controller

1755-

1755-

L1

IB24XOB16

RUN ERR RUN RUN RUN ERR RUN ERRERR

RUN ERR

1

LS+

2

I1

3

I2

4

I3

5

I4

6

I5

7

I6

8

I7

9

I8

Tx COL

10

LS+

11

I9

12

I10

13

I11

14

I12

10/100BaseT

15

I13

16

I14

17

I15

18

I16

LS+

19

I17

20

I18

21

I19

22

I20

23

I21

24

I22

25

I23

26

I24

27

28

L-

29

O1

30

O2

31

O3

32

O4

33

O5

34

O6

FB1

35

O7

36

O8

FB2

37

L-

38

O9

39

O10

40

O11

41

O12

42

O13

43

O14

44

O15

45

O16

CPU DIO AI AO CO

DIO

3V DC

LITH-BATT.

RUN STOP

PROG FAULT

FORCE

1755-

1755-

1755-

1755-

IB24XOB16

IF8

OF8

ERR

1

1

LS+

1

2

2

I1

2
3

3

I2

3

4

4

I3

4
5

5

I4

5
6

6

I5

6
7

7

I6

7
8

8

I7

8
9

9

I8

9

10

LS+

10

11

I9

11
12

I10

12
13

I11

13

14

I12

14
15

I13

15
16

I14

16

17

I15

17
18

I16

18

LS+

19

I17

20

I18

21

I19

22

I20

23

I21

24

I22

25

I23

26

I24

27

L-

28

O1

29

O2

30

O3

31

O4

32

O5

33

O6

34

O7

35

O8

36

L-

37

O9

38

O10

39

O11

40

O12

41

O13

42

O14

43

O15

44

O16

45

O1+

1

I1+

1

2

O1-

2

I-

O2+

3

I2+

3

O2-

4

I-

4

O3+

5

I3+

5

O3-

6

I-

6

O4+

7

I4+

7

O4-

8

I-

8

9

9

I5+/1-

O5+

10

10

I-

O5-

11

11

O6+

I6+/2-

12

12

I-

O6-

13

13

I7+/3-

O7+

14

14

I-

O7-

15

15

I8+/4-

O8+

16

16

I-

O8-

17

17

18

18

1755-

HSC

HSC

RUN ERR

C-

1

2
3

4
5
6
7
8
9

10

11
12
13

14
15
16

17
18

19

20
21
22

23
24
25
26
27

C-

1

A1

2

A1

B1

B1

3

Z1

Z1

4

C1

C1

5

C-

C-

6

C-

C-

7

C-

C-

8

C-

C-

9

C-

C-

10

A2

A2

11

B2

B2

12

Z2

Z2

13

C2

C2

14

C-

C-

15

C-

C-

16

C-

C-

17

C-

C-

18

L-

L-

19

1

1

20

2

2

21

3

3

22

4

4

23

L-

L-

24

L-

L-

25

L-

L-

26

L-

L-

27

CO

GuardPLC 2000 Power Supply

The 1755-PB720 power supply module provides two voltages
(3.3V DC and 5V DC) for the GuardPLC 2000 controller. They are
electrically isolated from the supply voltage, 24V DC.

1755-IB24XOB16 I/O Module

The 1755-IB24XOB16 digital input/output module provides 24 digital
inputs and 16 digital outputs. The status of each I/O signal is
displayed with a status indicator located on the right side of the front
plate connectors. Inputs and outputs are electrically isolated from the
supply voltage, 24V DC.

1755-IF8 Analog Input Module

The 1755-IF8 analog input module has eight inputs. These inputs can
be used as either eight single-ended inputs or four differential analog
inputs that are electrically isolated from the logic side of the GuardPLC
module. The measured input value can be either voltage or current. If
you use the input module for current, you need a shunt resistor. The
measured value is digitally transferred to the processor system as a
value between 0 and 2000.

26 Publication 1753-UM001C-EN-P - March 2010

Overview of Safety Controllers Chapter 1

1755-OF8 Analog Output Module

The 1755-OF8 analog output module provides eight outputs,
galvanically isolated in groups of 2 (that is, 2 outputs per power
supply). They are electrically isolated from the processor system. Each
analog output can operate as a current source or a voltage source.

1755-HSC High Speed Counter Module

The 1755-HSC counter module provides two counters and four digital
outputs. They are electrically isolated from the processor system. The
status of the four output signals is displayed with status indicators
located at the right side of the front plate output connector.

Communication Capabilities

GuardPLC Ethernet Network

The GuardPLC Ethernet network provides safe communication via
Ethernet protocol for distributed I/O and peer-to-peer communication
for all GuardPLC controllers. It also provides non-safety-related
communication with the OPC server. Programming and configuration
of controllers is accomplished via the GuardPLC Ethernet network.

Various GuardPLC systems can be networked together on the
GuardPLC Ethernet network, using star or daisy-chain configurations.
A programming device running RSLogix Guard PLUS! software can
also be connected wherever required.

IMPORTANT

Make sure that a network loop is not generated. Data packets
must only be able to reach a node via a single path.

Publication 1753-UM001C-EN-P - March 2010 27

Chapter 1 Overview of Safety Controllers

Star Configuration

To Programming Terminal

(—)4(—)

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

3

L-L- L+ L+

24V DC

RS-485
ASCII

COMM3

COMM2 COMM1

GuardPLC Ethernet

10/100 BaseT

(—)4(—)

3

123456

789101112

123456

1314 15 16 17 18

1L- L-DO 2 3 4

1LS+ LS+ LS+ LS+ LS+L-D1234

(2A)

1920 21 22 23 24

1920 21 22 23 241314 15 16 23 24

789101112

7L- L-DO 8 9 10

5L-D1678

9L-D1101112

2526 27 28 29 30

2526 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42

(2A)

1753-IB20OXB8

20 DC Inputs
8 DC Outputs

13 L-D1141516

17 L-D1181920

3132 33 34 35 36

3738 39 40 41 42

L-L- L+ L+

24V DC

24 V DC

RUN
ERROR
PROG
FORCE
FAULT

OSL

BL

DIO

123456

1234

56

1L-

L-DO 2

34

24 V DC
RUN
ERROR
PROG
FORCE
FAULT
OSL
BL

(2A)

5L-D1678

1LS+- LS+ LS+ LS+ LS+L-D1234

13 14 15 16 17 18

19 20 21 22 23 24

19 20 21 22 23 241314 15 16 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

MODBUS

GuardPLC Ethernet Networking Example

123456

789101112

123456

1L- L-DO 2 3 4

(2A)

1LS+ LS+ LS+ LS+ LS+L-D1234

1314 15 16 17 18

1920 21 22 23 24

1920 21 22 23 241314 15 16 23 24

DIO

1753-IB20OXB8
20 DC Inputs
8 DC Outputs

13 L-D1141516

17 L-D1181920

3132 33 34 35 36

3738 39 40 41 42

789101112

789101112

7L- L-DO 8 9 10

(2A)

9L-D1101112

2526 27 28 29 30

2526 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42

789101112

7L- L-DO 8 9 10

5L-D1678

9L-D1101112

2526 27 28 29 30

2526 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42

1753-IB20OXB8

20 DC Inputs
8 DC Outputs

13 L-D1141516

17 L-D1181920

3132 33 34 35 36

3738 39 40 41 42

(2A)

1753-IB20OXB8

20 DC Inputs
8 DC Outputs

13 L-D1141516

17 L-D1181920

3132 33 34 35 36

3738 39 40 41 42

789101112

78910

25 26 27 28 29 30

24 V DC

L-L- L+ L+

24V DC

24 V DC

RUN

ERROR

PROG
FORCE
FAULT

OSL
BL

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

1112

5L- L-DO 6

7 8

(2A)

Controller

1753-L28BBBM

20 DC Inputs
8 DC Outputs

9L-D1101112

13 L-D1141516

17 L-D1181920

31 32 33 34 35 36

37 38 39 40 41 42

123456

789101112

123456

1314 15 16 17 18

1L- L-DO 2 3 4

1LS+ LS+ LS+ LS+ LS+L-D1234

(2A)

1920 21 22 23 24

1920 21 22 23 241314 15 16 23 24

789101112

7L- L-DO 8 9 10

5L-D1678

9L-D1101112

2526 27 28 29 30

2526 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42

(2A)

L-L- L+ L+

24V DC

RUN
ERROR
PROG
FORCE
FAULT

OSL

BL

DIO

123456

123456

L-L- L+ L+

24V DC

1L- L-DO 2 3 4

(2A)

24 V DC

RUN

ERROR

PROG
FORCE
FAULT

OSL
BL

1LS+ LS+ LS+ LS+ LS+L-D1234

5L-D1678

1314 15 16 17 18

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

1920 21 22 23 24

1920 21 22 23 241314 15 16 23 24

DIO

Daisy-chain (Line) Configuration

To Programming Terminal

(—)4(—)

3

ASCII

COMM3

GuardPLC Ethernet

10/100 BaseT

L-L- L+ L+

24V DC

RS-485

COMM2 COMM1

(—)4(—)

3

123456

1234

56

1L-

L-DO 2

34

24 V DC
RUN
ERROR
PROG
FORCE
FAULT
OSL
BL

(2A)

1LS+- LS+ LS+ LS+ LS+L-D1234

5L-D1678

13 14 15 16 17 18

19 20 21 22 23 24

19 20 21 22 23 241314 15 16 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

MODBUS

Controller

123456

123456

L-L- L+ L+

24V DC

1L- L-DO 2 3 4

24 V DC

RUN

ERROR

PROG

FORCE

FAULT

OSL
BL

1LS+ LS+ LS+ LS+ LS+L-D1234

1314 15 16 17 18

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

123456

789101112

78910

25 26 27 28 29 30

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

L-L- L+ L+

24V DC

24 V DC

RUN
ERROR
PROG
FORCE
FAULT

OSL

BL

1112

5L- L-DO 6

7 8

(2A)

1753-L28BBBM

20 DC Inputs
8 DC Outputs

9L-D1101112

13 L-D1141516

17 L-D1181920

31 32 33 34 35 36

37 38 39 40 41 42

123456

1314 15 16 17 18

1L- L-DO 2 3 4

1LS+ LS+ LS+ LS+ LS+L-D1234

(2A)

1920 21 22 23 24

1920 21 22 23 241314 15 16 23 24

789101112

789101112

5L-D1678

2526 27 28 29 30

2526 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42

DIO

DIO DIO

(2A)

1920 21 22 23 24

1920 21 22 23 241314 15 16 23 24

789101112

789101112

7L- L-DO 8 9 10

5L-D1678

9L-D1101112

2526 27 28 29 30

2526 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42

(2A)

1753-IB20OXB8

20 DC Inputs
8 DC Outputs

13 L-D1141516

17 L-D1181920

3132 33 34 35 36

3738 39 40 41 42

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

123456

123456

L-L- L+ L+

24V DC

1L- L-DO 2 3 4

(2A)

24 V DC

RUN
ERROR
PROG
FORCE
FAULT

OSL

BL

1LS+ LS+ LS+ LS+ LS+L-D1234

1314 15 16 17 18

7L- L-DO 8 9 10

(2A)

9L-D1101112

5L-D1678

1920 21 22 23 24

1920 21 22 23 241314 15 16 23 24

1753-IB20OXB8

20 DC Inputs
8 DC Outputs

13 L-D1141516

17 L-D1181920

3132 33 34 35 36

3738 39 40 41 42

789101112

789101112

7L- L-DO 8 9 10

(2A)

9L-D1101112

2526 27 28 29 30

2526 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42

3132 33 34 35 36

1753-IB20OXB8

20 DC Inputs
8 DC Outputs

13 L-D1141516

17 L-D1181920

3738 39 40 41 42

EtherNet/IP

GuardPLC 1600 and GuardPLC 1800 controllers support EtherNet/IP
communication. Able to run EtherNet/IP communication at the same
time as safety-rated GuardPLC Ethernet network, the GuardPLC
controller uses the EtherNet/IP network to communicate status about
the safety control system to other standard devices such as PLCs
(ControlLogix, FlexLogix, CompactLogix, SLC 500, or PLC-5
controllers), HMIs (PanelView, PanelView Plus, and VersaView
terminals) and others. The GuardPLC controller can even control
standard I/O, like FLEX I/O and POINT I/O modules, on an
EtherNet/IP network.

ASCII

This read-only, non-safety-related protocol can be used to extract
diagnostic and status information from the GuardPLC controllers.
ASCII protocol is available over the RS-232 port on the GuardPLC 1200
and GuardPLC 2000 controllers and via the RS-485 Comm 3 port on
GuardPLC 1600 and GuardPLC 1800 controllers.

See Chapter 21 for details on communication with ASCII devices.

28 Publication 1753-UM001C-EN-P - March 2010

Overview of Safety Controllers Chapter 1

High-speed Safety Protocol

GuardPLC 1600 and 1800 controllers support High-speed Safety
Protocol (HSP), which allows them to connect to the DeviceNet safety
network via the 1753-DNSI DeviceNet Safety Scanner.

Refer to the DeviceNet Safety Scanner for GuardPLC Controllers User
Manual, publication

1753-UM002, for more information.

Modbus RTU Slave

Modbus is a standard industrial non-safety-related serial protocol in
which the Modbus master can communicate with a maximum of 255
slave devices. The Modbus master initiates and controls all
communication on the network.

Modbus RTU Slave protocol is available via the RS-485 Comm 1 port
on GuardPLC 1600 and GuardPLC 1800 controllers with catalog
numbers ending in ‘M’.

Modbus RTU Slave protocol allows both the reading and writing of
data.

For more information on the Modbus RTU Slave protocol, see the
Modbus Protocol Specifications, available from

www.modbus.org/specs.

PROFIBUS DP Slave

PROFIBUS DP protocol is a non-safety-related serial protocol,
designed for high-speed data transmission between automation
systems and distributed peripherals.

PROFIBUS DP slave protocol is available via the RS-485 Comm 1 port
on GuardPLC 1600 and GuardPLC 1800 controllers with catalog
numbers ending in ‘P’.

PROFIBUS DP Slave protocol allows both the reading and writing of
data.

Publication 1753-UM001C-EN-P - March 2010 29

Chapter 1 Overview of Safety Controllers

OPC Server

The GuardPLC 1600, GuardPLC 1800, series C GuardPLC 1200, and
series C GuardPLC 2000 controllers are OPC clients. An OPC server,
catalog number 1753-OPC, is available from Rockwell Automation and
lets personal computer applications read and write data to and from
the GuardPLC controller (non-safety-related communication only).

30 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

Installation

Topic Page

General Safety 31
Mount the Equipment 32
Communication Connections 38
Reset Pushbutton 43

2

General Safety

Open style devices must be provided with environmental and safety
protection by proper mounting in enclosures designed for specific
application conditions. See NEMA Standards 250 and IEC 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure.

ATTENTION

Consider the following before installing your GuardPLC
1200/1600/1800 controller or distributed I/O.

These products are grounded through the DIN rail. Use
zinc-plated yellow-chromate steel DIN rails to assure proper
grounding. The use of other DIN rail materials (for example,
aluminum and plastic) that can corrode, oxidize, or are poor
conductors, can result in improper or intermittent grounding.

31Publication 1753-UM001C-EN-P - March 2010 31

Chapter 2 Installation

M

ount the Equipment

GuardPLC 1200 Controller

The GuardPLC 1200 controller can be either snapped onto a DIN rail
or mounted to a back panel by using bolts. DIN rail mounting is the
easiest way to attach the controller and should be used wherever
possible.

IMPORTANT

DIN Rail

1. Hook the two top latches, on the back of the GuardPLC 1200

controller, over the top of the DIN rail.

For cooling reasons:

• the GuardPLC 1200 controller must be mounted horizontally

with the Ethernet socket facing down.

• a location where air flows freely or use an additional cooling

fan.

• the minimum clearance around the

GuardPLC 1200 controller must be at least 100 mm (3.94 in.).

• do not mount the GuardPLC 1200 controller over a heating

device.

2. If the lower latches are extended (see figure below), push them

up until they lock into place. If the lower latches are not
extended, press the GuardPLC 1200 controller into the DIN rail
until they lock into place.

PLC

1200

Lower Latch (Not Extended)

TIP

Lower Latch (Extended)

If you need to remove the controller from the DIN rail, use a
screwdriver to pull down the lower latches, then lift the
controller toward you.

32 Publication 1753-UM001C-EN-P - March 2010

Back Panel

Installation Chapter 2

ATTENTION

Do not bend the controller. Bending the controller will damage
it.

Use the four brackets on the GuardPLC 1200 controller to mount it
onto a back panel.

Top Brackets

Use the following to mount the
controller.

PLC

1200

Bottom Brackets

Top Brackets Bottom Brackets

M4 screws (2) M5 screws (2)
lock washer lock washer
washers washers
nut nut

If the mounting brackets are not flat before the nuts are tightened, use
additional washers as shims, so the controller does not bend when
you tighten the nuts.

GuardPLC 1600 and GuardPLC 1800 Controllers,
and Distributed I/O

IMPORTANT

Publication 1753-UM001C-EN-P - March 2010 33

For effective cooling:

• mount the device horizontally.

• provide a gap of at least 100 mm (3.94 in.) above and below the device and at

least 20 mm (0.79 in.) horizontally between devices.

• the wire duct can run in the 100 mm (3.94 in.) of free space above and below

the controller if it is no deeper than 40 mm (1.58 in.). If the depth is greater
than 40 mm (1.58 in.), the devices must be placed on stand-offs that match the
depth of the duct. If stand-offs are not used, you must provide a gap of at least
80 mm (3.15 in.) between the device and the duct.

• select a location where air flows freely or use an additional fan.

• do not mount the controller or I/O module over a heating device.

• do not block the ventilation slots on the side of the device.

Chapter 2 Installation

GuardPLC 1600 and GaurdPLC 1800 controllers and I/O cannot be
panel-mounted. Mount these controllers and distributed I/O to a DIN
rail by following the steps below.

1. Hook the top slot over the DIN

rail.

2. Insert a flathead screwdriver into

the gap between the housing and

(3)

(2)

(1) Top Slot

DIN Rail

the latch and pull the latch
downward.

Latch

3. Hold the latch down as you push

the housing back onto the DIN rail.

4. Release the latch to lock the device onto the rail.

TIP

To remove the device from the DIN rail, insert a flathead
screwdriver into the gap between the housing and the latch
and pull the latch downward as you lift the device off of the
rail.

GuardPLC 2000 Chassis

The GuardPLC 2000 chassis provides two flanges with eyelets. Refer to
the illustration below. Use bolts to mount the system to a back panel.

To mount the chassis flanges, you will need four M8-size bolts with
lock washer, washer, and nut with 13 mm (0.51 in.) max head
diameter. The bolts must be long enough to accept the chassis at its
mounting place.

ATTENTION

• Do not bend the chassis. Bending will damage the chassis

and/or the backplane inside the GuardPLC 2000 controller.

• If the rear side of the chassis does not lie flat before the nuts

are tightened, use additional washers as shims so that the
chassis does not bend when you tighten the nuts.

34 Publication 1753-UM001C-EN-P - March 2010

Installation Chapter 2

IMPORTANT

• The chassis must be installed without any modules inserted.

• Disconnect the supply voltage before mounting the chassis.

• The chassis must be vertically mounted with the cooling fans on

the lower side.

• Do not obstruct ventilation openings.

• Provide a gap of at least 100 mm (3.94 in.) above and below the

device and at least 20 mm (0.79 in.) horizontally between
devices.

Modules are shown for illustration only. The chassis must be installed without any modules inserted.

255 mm (10 in.) Including Flanges

236 mm (9.3 in.) Width Eyelet to Eyelet

285 mm

(11.2 in.)

15.9 mm (0.63 in.)

Eyelet

Flanges

177.8 mm
(7.0 in.)

Depth:
218 mm
(8.6 in.)

Includes
Termination
Plug

Publication 1753-UM001C-EN-P - March 2010 35

Eyelet

Chapter 2 Installation

GuardPLC 2000 Controller, I/O, and Power Supply

Mount the GuardPLC 2000 chassis prior to installing the controller,
I/O, and power supply.

IMPORTANT

Disconnect the power supply, 1755-PB720, from the 24V DC
supply voltage before you insert any I/O modules.

1. Before you insert the device, you must detach the grounding

grill. To do this, remove the grounding grill screws.

grounding grill screws

2. Remove the lower panel of the chassis and disconnect the fans.

3. Power Supply: Insert the power supply into the leftmost slot of

the chassis.

Controller: Insert the controller into the slot directly to the right
of the power supply module (slot 0).

I/O Module: Insert the module into any unused slot from 1…6
(see the figure below). Keep the module in line with the guides
so the module runs smoothly in the track.

4. Begin pushing the device into the chassis.

a. If there is resistance when you push the device into the

backplane, do not force the device because the pins will
bend.

b. Remove the device and start again at step 3

.

5. Continue pushing the device into the chassis until the front of

the device is flush with the other modules in the chassis.

36 Publication 1753-UM001C-EN-P - March 2010

Installation Chapter 2

Allen-Bradley

Allen-Bradley

6. Secure the device with the screws on the top and bottom of the

device (see the figure below).

Controller Screw

Power Supply Screws

A-B

QUALITY

Guard

PLC

2000

Slot 0

A-B

QUALITY

Guard

PLC

2000

1755-

IF8

RUN

ERR

1

I1+

2

I-

3

I2+

4

I-

5

I3+

6

I-

7

I4+

8

I-

9

10

I5+/1-

11

I-

12

I6+/2-

13

I-

14

I7+/3-

15

I-

16

I8+/4-

17

I-

18

Slot 1

Power Supply Screws

I/O Module Screw

Slot 2

Slot 3

Guides

Slot 4

Slot 6

Slot 5

I/O Module Screw

TIP

If you are installing other GuardPLC 2000 modules, follow their
installation instructions up to this point before you complete the
next 3 steps.

7. Reconnect the fans.

8. Replace the lower panel of the chassis, sliding it over the tabs on

the sides of the chassis and under the tabs on the back of the
chassis.

9. Use the grounding grill screws to attach the grounding grill.

Publication 1753-UM001C-EN-P - March 2010 37

Chapter 2 Installation

Communication Connections

Connections for safety and non-safety related communication for
GuardPLC controllers and distributed I/O modules are described in
the following sections.

GuardPLC 1200 Controller

The GuardPLC 1200 controller has an ASCII serial port for
non-safety-related communication and an Ethernet port for
safety-related communication.

Connect the ASCII port to any RS-232 device that has the capability to
send ASCII command strings to the controller. The controller replies
with a data variable string. See Chapter
ASCII communication

Use this illustration to connect the ASCII and Ethernet ports.

ASCII
Serial Port

(Use 1761-CBL-PM02
Series C Cable)

21 for more information on

PLC

1200

Port for
Factory
Use
Only

Ethernet Dongle

Ethernet Port

(On Bottom of Controller)

The pin assignment of the ASCII Serial port is shown below.

2

4

3

8

1

Pin Function

5

6

1 24V DC

7

2 ground (GND)
3 request to send (RTS)
4 received data (RxD)
5 received line signal detector (DCD)
6 clear to send (CTS)
7 transmitted data (TxD)
8 ground (GND)
9 not applicable

38 Publication 1753-UM001C-EN-P - March 2010

Installation Chapter 2

GuardPLC 1600 and GuardPLC 1800 Controllers

Connections for safety- and non-safety-related communication are
described in the following sections.

Connections for Safety-Related Communication

The controller has four 10/100BaseT, RJ-45 connectors to provide
communication via the GuardPLC Ethernet network to other
GuardPLC controllers, distributed I/O, and RSLogix Guard PLUS!
software. These connectors also provide communication via an
EtherNet/IP network to other Ethernet devices. Connectors 1 and 2
are located on the bottom side on the left. Connectors 3 and 4 are
located on the top side on the left.

Ethernet Ports 3 and 4

(—)4(—)

3

L-L- L+ L+

24V DC

RS-485

ASCII/HSP

MODBUS

COMM1

COMM2COMM3

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

Ethernet Ports 1 and 2

All four connectors and the GuardPLC controller are connected
together by an internal Ethernet switch. In contrast to a hub, a switch
is able to store data packets for a short period of time to establish a
temporary connection between two communication partners for the
transfer of data. In this way, collisions (typical of a hub) can be
avoided and the load on the network is reduced.

The switch automatically switches between transfer rates of 10 and
100 Mbps and between full- and half-duplex connections. This makes
the full bandwidth available (full-duplex operation) in both directions.

A switch enables several connections to be established at the same
time and can address up to 1000 absolute MAC addresses.

Auto-crossing recognizes that cables with crossed wires have been
connected and the switch adjusts accordingly. Therefore, either
cross-over or straight-through Ethernet cabling can be used.

Star or line configurations are available. Make sure that a network
loop is not generated. Data packets must only be able to reach a node
via a single path.

Publication 1753-UM001C-EN-P - March 2010 39

Chapter 2 Installation

See Chapter 16 for information on peer-to-peer communication or

Chapter

18 for information on EtherNet/IP communication.

Connections for Non-Safety-Related communication

Three 9-pin Min-D connectors are located on the front of the
controller, providing these communication options.

Designation Function

COMM1 (RS-485) Modbus RTU Slave (1753-L28BBBM or 1753-L32BBBM-8A)

Profibus-DP-Slave 1753-L28BBBP or 1753-L32BBBP-8A)
COMM2 not used
COMM3 GuardPLC ASCII Protocol/HSP

(—)4(—)

3

L-L- L+ L+

24V DC

RS-485

ASCII/HSP

MODBUS

COMM1

COMM2COMM3

ASCII/HSP Port (COMM 3)

IMPORTANT

The three Min-D connectors are RS-485. You must use an
electrical interface device to connect the controller to an
RS-232 device.

To use COMM3 for HSP, you must use a 1753-CBLDN cable,
which ships with the 1753-DNSI DeviceNet Safety Scanner for
GuardPLC Controllers.

GuardPLC Ethernet

10/100 BaseT

(—)4(—)

3

Modbus or Profibus Port
(COMM 1)

40 Publication 1753-UM001C-EN-P - March 2010

Installation Chapter 2

The pin assignment of the Min-D connectors is shown in the table
below.

Connection Signal Function

1——
2 RP 5V, decoupled with diodes
3 RxD/TxD-A Receive/Transmit data A
4 CNTR-A Control Signal A
5 DGND Data reference potential
6 VP 5V, positive pole of supply voltage
7——
8 RxD/TxD-B Receive/Transmit data B
9 CNTR-B Control Signal B

GuardPLC Distributed I/O Modules

Each module has two 10/100BaseT, RJ-45 connectors to provide
safety-related communication via the GuardPLC Ethernet network.
These two connectors and the GuardPLC distributed I/O module are
connected together by an internal Ethernet switch.

L-L- L+ L+

24V DC

24 V DC

RUN

ERROR

PROG
FORCE
FAULT

OSL

BL

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

Ethernet Ports 1 and 2

Publication 1753-UM001C-EN-P - March 2010 41

Chapter 2 Installation

GuardPLC 2000 Controller

Connections for safety- and non-safety-related communication are
described in the following sections.

Connections for Safety-Related Communication

To configure/program the GuardPLC system, the controller must be
connected on an Ethernet network to the RSLogix Guard PLUS!
programming terminal. The GuardPLC Ethernet network also provides
for peer-to-peer communication to distributed I/O and to other
controllers.

Tx COL

Ethernet Port

10/100 Base T

Connections for Non-Safety-Related Communication

Connect the ASCII port (FB2) to any RS-232 device that has the
capability to send ASCII command strings to the controller. The
controller replies with a data variable string. See Chapter
information on ASCII communication.

pin function

1 none
2 send data
3 receive data
4 none
5 ground
6 none
7RTS
8CTS
9 none

ASCII Port

FB1

FB2

1

6

2

7

3

8

4

9

5

21 for more

42 Publication 1753-UM001C-EN-P - March 2010

Installation Chapter 2

Reset Pushbutton

GuardPLC 1600 and 1800 controllers and distributed I/O are equipped
with a reset pushbutton. Reset via the pushbutton is necessary if you:

• forget the password to go online via the programming software.

• are unable to determine the IP address and SRS of the controller.

The pushbutton is accessible through a small round hole at the top of
the housing, approximately 4…5 cm (1.6…2.0 in.) from the left rim
and recessed approximately 9.5 mm (0.375 in.).

IMPORTANT

To reset, press and hold the pushbutton while restarting the controller
by cycling power. Hold the reset pushbutton until the PROG status
indicator stops flashing. Pressing the Reset pushbutton during
operation has no affect.

After a reset, the IP address, SRS, and login accounts are temporarily
reset to their default settings.

• IP = 192.168.0.99

• SRS = 60000.1

• Login Username = Administrator

• Login Password = [none]

Activate the reset pushbutton by using an insulated pin to
prevent short-circuits.

At the next power cycle, these settings will be reset to the last values
stored into Flash. This means that either:

• the settings prior to the reset will be restored.

• if any settings were changed after the reset, these new settings

will still be in effect.

Publication 1753-UM001C-EN-P - March 2010 43

Chapter 2 Installation

Notes:

44 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

General Wiring Considerations

Topic Page

Prevent Electrostatic Discharge 45
Power Supply Considerations 45
Ground the Equipment 46
Terminal Connections 47
Shield-contact Plate Connections 48
Detailed Wiring Information 48

3

Prevent Electrostatic Discharge

Power Supply Considerations

ATTENTION

The power supply must provide a voltage between 20.4 and

28.8V DC. You must supply enough power to drive the controller,
inputs, and outputs because all GuardPLC controllers and distributed
I/O modules source the current for the input channels and drive the
output devices connected to them. No additional power supply is
required to drive outputs. To operate, GuardPLC controllers typically
draw less than 1 A at 24V DC. They require additional power to
operate the inputs and outputs connected to the controller. Consider
the power draw of the I/O when specifying the size of the power
supply and required fusing.

Electrostatic discharge can damage integrated circuits or
semiconductors. Follow these guidelines when you handle the
module.

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• Do not touch conductors or pins on component boards.

• Do not touch circuit components inside the equipment.

• Use a static-safe workstation, if available.

• Keep the equipment in appropriate static-safe packaging

when not in use.

45Publication 1753-UM001C-EN-P - March 2010 45

Chapter 3 General Wiring Considerations

The 24V DC voltage supply must feature galvanic isolation because
inputs and outputs are not electrically isolated from the internal

processor.

(1)

To comply with CE Low Voltage Directives (LVD), you
must use either an NEC Class 2, a Safety Extra Low Voltage (SELV) or a
Protective Extra Low Voltage (PELV) power supply to power the
GuardPLC controller or I/O module. A SELV supply cannot exceed
30V rms, 42.4V peak or 60V DC under normal conditions and under
single fault conditions. A PELV supply has the same rating and is
connected to protective earth.

Ground the Equipment

IMPORTANT

Protect the controller with a slow-blow fuse.

You must provide an acceptable grounding path for each device in
your application. For more information on proper grounding
guidelines, refer to the Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1

.

Considerations for Grounding All Controllers

• To improve EMC conditions, ground the controller.

• Run the ground connection from the ground screw of the

controller to a good earth ground. Use a minimum of 2.5 mm
(14 AWG) wire.

• Keep the connection to earth ground as short as possible to

minimize resistance.

• Grounding is required even if the control system does not have

shielded cables.

• If you use shielded cables to connect the controller to the

external 24V DC source, connect the shield to the grounding
contact of the power supply.

• No protective grounding (against hazardous shock) is required.

2

GuardPLC 1200 Controller

Ground the GuardPLC 1200 controller by connecting the PA terminal,
marked , to earth ground. See page 58
connections.

(1) The I/O and CPU are only isolated from one another on the GuardPLC 2000 controller.

46 Publication 1753-UM001C-EN-P - March 2010

for GuardPLC 1200 terminal

General Wiring Considerations Chapter 3

CPU DIO AI AO CO

PS

DIO CO

GuardPLC 1600 and GuardPLC 1800 Controllers and Distributed I/O

The I/O module is functionally grounded through its DIN rail
connection. A protective earth ground connection is required and is
provided by a separate grounding screw, located on the upper left of
the housing and marked with the grounding symbol .

ATTENTION

This product is grounded through the DIN rail to chassis ground.
Use zinc plated yellow-chromate steel DIN rail to assure proper
grounding. The use of other DIN rail materials (for example,
aluminum and plastic) that can corrode, oxidize, or are poor
conductors, can result in improper or intermittent grounding.

GuardPLC 2000 Chassis

Ground the GuardPLC 2000 chassis and cables by using the grounding
screw located on the left side of the grounding grill. Ground the
chassis via the grounding grill.

Grounding Grill

Grounding Screw

Terminal Connections

Terminals accommodate wire sizes up to 1.5 mm2 (16 AWG) for

2

input/output wiring and up to 2.5 mm

(14 AWG) for voltage supply

connections.

Publication 1753-UM001C-EN-P - March 2010 47

Chapter 3 General Wiring Considerations

63 64 65 66 67 68 71 7269 70

net

Shield-contact Plate Connections

Shielded cabling is fed in from below so that the shielding can be
connected to the shield-contact plate by using a clip. Remove about 2
cm (0.79 in.) of the outer cable insulation so that the mesh is exposed
at the point where the cable is clipped to the plate. Position the clip
over the uninsulated cable shielding and push it into the slots of the
shield contact plate until it fits firmly in place, as shown below.

Mesh

Cable Clip

Shield-contact Plate

IMPORTANT

Make sure that the mesh comes in direct contact with the
shield-contact plate. If the mesh does not touch the plate, the
cable is not grounded.

Detailed Wiring Information

For detailed wiring information by product, see the table below.

For See

GuardPLC 1600, GuardPLC 1800 and
GuardPLC 1200 Controllers

GuardPLC 2000 Controller Chapter 5
1753-IB16, 1753-OB16, 1753-IB20XOB8

Modules
1753-IB8XOB8 Chapter 7
1753-IB16XOB8 Chapter 8
1753-IF8XOF4 Chapter 9
1753-OW8 Chapter 10
Wiring Examples Appendix C

Chapter

Chapter 6

4

To be sure that GuardPLC controllers and I/O modules are used in a
safety-related manner (SIL3 in accordance to IEC 61508), the whole
system, including connected sensors and encoders, must satisfy the
safety requirements described in the GuardPLC Controllers Safety
Reference Manual, publication 1753-RM002

.

48 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

4

Wire GuardPLC 1600, GuardPLC 1800, and
GuardPLC 1200 Controllers

Topic Page

Power Supply Connections 49
Safety-related Digital Inputs 50
Safety-related Digital Outputs 51
Safety-related Analog Inputs 51
High-speed Counters 52
Wire the GuardPLC 1600 Controller 53
Wire the GuardPLC 1800 Controller 54

Power Supply Connections

Wire the GuardPLC 1200 Controller 58

Power supply connections for GuardPLC 1600, GuardPLC 1800, and
GuardPLC 1200 controllers are described in the following sections.

GuardPLC 1600 and GuardPLC 1800 Controllers

ATTENTION

The supply voltage is connected via a 4-pin connector that
accommodates wire sizes up to 2.5 mm

connect one wire to L+ and one wire to L-. Both L+ and L- terminals
are internally connected. The other terminal can be used to
daisy-chain 24V DC to additional devices. The power supply
connector is rated to 10 A.

Before connecting the power supply, check for correct polarity,
value, and ripple.

Do not reverse the L+ and L- terminals or damage to the
controller will result. There is no reverse polarity protection.

2

(14 AWG). You only need to

49Publication 1753-UM001C-EN-P - March 2010 49

Chapter 4 Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers

GuardPLC 1200 Controller

Both L+ and L- terminals must be used in parallel to allow the
maximum current of 8 A. (Each terminal maximum is 4 A so both are
required for 8 A.)

If the power supply has only one (+) lead, a short bridge jumper must
be installed between L+

and L+

(1)

(2)

.

Safety-related Digital Inputs

TIP

The status of digital inputs is indicated via status indicators when the
controller or module is in Run mode.

Follow the closed-circuit principle for external wiring when
connecting sensors. To create a safe state in the event of a fault, the
input signals revert to the de-energized state (0). The external line is
not monitored, but a wire break is interpreted as a safe (0) signal.

The GuardPLC 1600 and GuardPLC 1800 controllers provide power to
input devices through their LS+ terminals. However, input devices
with their own dedicated power supply can also be connected instead
of contacts. The reference pole (L-) of the power supply must then be
connected to the reference pole (L-) of the appropriate GuardPLC
input group. See the wiring diagrams in Appendix

In general, the LS+ terminals, not L+ on the power supply connection,
should be used to supply voltage for safety inputs. Each LS+ features
individual short-circuit and EMC protection. Due to current limitations,
use LS+ for only the safety inputs on the same terminal plug.

The GuardPLC 1200 controller requires approximately 0.5 A to
operate. The remaining 7.5 A is used to source power for inputs
and outputs.

C for examples.

An EN 61000-4.5 surge impulse can be read as a short-duration HI
signal in some modules. To avoid an error, either:

• install shielded input lines to prevent effects of surges in the

system.

• implement software filtering in the user program. A signal must

be present for at least two cycles before it is evaluated.

50 Publication 1753-UM001C-EN-P - March 2010

Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers Chapter 4

Safety-related Digital Outputs

The status of digital outputs is indicated via status indicators when the
controller or module is in Run mode.

GuardPLC outputs are rated to either 0.5 A or 1.0 A at an ambient
temperature of 60 °C (140 °F). At an ambient temperature of 50 °C
(122 °F), outputs rated at 1.0 A increase to 2.0 A.

If an overload occurs, the affected outputs are turned off. When the
overload is eliminated, the outputs are under the control of the
controller and are energized based on the user program code.

An output is in the safe state when it is de-energized. Therefore,
outputs are switched off when a fault that affects the safe control of
those outputs occurs.

For connection of a load, the reference pole L- of the corresponding
channel group must be used. Although L- poles are connected
internally to L- on the power supply input, it is strictly recommended
to connect the L- reference poles only to their corresponding output
group. EMC testing was performed in this manner.

TIP

Inductive loads can be connected without a protection diode on
the load, because there is a protection diode located within the
GuardPLC device. However, Rockwell Automation strongly
recommends that a protection diode be fitted directly to the
load to suppress any interference voltage. A 1N4004 diode is
recommended.

Safety-related Analog Inputs

Publication 1753-UM001C-EN-P - March 2010 51

GuardPLC 1800 controller analog inputs provide for the unipolar
measurement of voltages from 0…10V, referenced to L-. A 10 KΩ
shunt is used for single-ended voltage signals. With a 500 Ω shunt
resistor, currents from 0…20 mA can also be measured.

Analog cabling should be no more than 300 m (984 ft) in length. Use
shielded, twisted-pair cables, with the shields connected at one end,
for each measurement input. See the instructions for connecting

8

shielded cabling to the shield-contact plate on page 4

Unused analog inputs must be short-circuited. Place wire jumpers to
ground on any inputs that are not used.

AI

T1 I1 L- T2 I2 L-

41 42 43 44 45 46

Wire Jumper Wire Jumper

.

Chapter 4 Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers

High-speed Counters

The GuardPLC 1200 and 1800 controllers feature inputs for high-speed
counting up to a maximum of 100 kHz. These counters are 24-bit, and
are configurable for either 5V or 24V DC. The counters can be used as
a counter or as a decoder for 3-bit Gray Code inputs. As a counter,
input A is the counter input, input B is the counter direction input,
and input Z is used for a reset.

The counter inputs must be connected by using shielded, twisted-pair
cables for each measurement input. The shields must be connected at
both ends. The input lines should be no more than 500 m (1640 ft) in
length. All reference (L-, C-, or I- depending on the controller)
connections are interconnected on the module in the form of common
reference pole.

Cables are clipped to the shield contact plate when connecting
counter inputs. See the instructions for connecting shielded cabling to
the shield contact plate on page 48

IMPORTANT

D

Do not terminate unused high-speed counter inputs.

.

52 Publication 1753-UM001C-EN-P - March 2010

Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers Chapter 4

Wire the GuardPLC 1600 Controller

Input and output terminal connections for the GuardPLC 1600
controller are described below.

Safety-related Digital Input Terminals

DI

1LS+ LS+ LS+ LS+ LS+L-

234

13 14 15 16 17 18

Digital inputs are connected to these terminals.

Terminal Number Designation Function

13 LS+ Sensor supply for inputs 1…4
14 1 Digital input 1
15 2 Digital input 2
16 3 Digital input 3
17 4 Digital input 4
18 L- Reference pole
19 LS+ Sensor supply for inputs 5…8
20 5 Digital input 5
21 6 Digital input 6
22 7 Digital input 7
23 8 Digital input 8
24 L- Reference pole
25 LS+ Sensor supply for inputs 9…12
26 9 Digital input 9
27 10 Digital input 10
28 11 Digital input 11
29 12 Digital input 12
30 L- Reference pole
31 LS+ Sensor supply for inputs 13 …16
32 13 Digital input13
33 14 Digital input 14
34 15 Digital input 15
35 16 Digital input 16
36 L- Reference pole
37 LS+ Sensor supply for inputs 17…20
38 17 Digital input 17
39 18 Digital input 18
40 19 Digital input 19
41 20 Digital input 20
42 L- Reference pole

DI

5L-

678

19 20 21 22 23 24

19 20 21 22 23 2413 14 15 16 17 18 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

DI

9L-

10 11 12

25 26 27 28 29 30

DI

13 L-

14 15 16

31 32 33 34 35 36

DI

17 L-

18 19 20

37 38 39 40 41 42

Publication 1753-UM001C-EN-P - March 2010 53

Chapter 4 Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers

Safety-related Digital Output Terminals

123456

1234

56

1L- L-DO 2

34

(2 A)

789101112

78910

11 12

5L- L-DO 6

7 8

(2 A)

Digital outputs are connected to these terminals.

Terminal Number Designation Function Current

1 L- Reference pole —
2 1 Digital output 1 0.5 A
3 2 Digital output 2 0.5 A
4 3 Digital output 3 0.5 A
5 4 Digital output 4 (for increased load) 2.0 A
6 L- Reference pole —
7 L- Reference pole —
8 5 Digital output 5 0.5 A
9 6 Digital output 6 0.5 A
10 7 Digital output 7 0.5 A
11 8 Digital output 8 (for increased load) 2.0 A
12 L- Reference pole —

Wire the GuardPLC 1800 Controller

The controller has 24 digital inputs whose status is indicated via status
indicators when in Run mode. The digital inputs are actually analog
inputs that provide the program with UINT values of 0…30V
(0…3000), which are used to create limit values to calculate signals for
the digital inputs. Default settings are:

• <7V = 0 signal.

• >13V = 1 signal.

The limit values are set by using system variables. See page 328

for

more information on configuring these inputs.

TIP

Because digital inputs are actually analog values, the .USED
variable must be set HI in the output signal connections dialog
box to activate the digital input.

The 24 digital inputs of the GuardPLC 18000 controller can be used as
analog inputs by reading the DI[xx].Value Analog input signal.
However, because these inputs are intended to be used as digital
inputs, the accuracy of their analog values is not guaranteed to the be
same as the published accuracy of the 8 actual analog inputs in the
GuardPLC 1800 controller.

54 Publication 1753-UM001C-EN-P - March 2010

Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers Chapter 4

Safety-related Digital Input Terminals

11 12 13 14 15 16

11 12 13 14

1LS+ L-DI 2 3 4 5 6 7 8

Digital inputs are connected to these terminals.

Terminal Number Designation Function

11 LS+ Sensor supply for inputs 1…8
12 1 Digital input 1
13 2 Digital input 2
14 3 Digital input 3
15 4 Digital input 4
16 5 Digital input 5
17 6 Digital input 6
18 7 Digital input 7
19 8 Digital input 8
20 L- reference pole
21 LS+ Sensor supply for inputs 9…16
22 9 Digital input 9
23 10 Digital input 10
24 11 Digital input 11
25 12 Digital input 12
26 13 Digital input 13
27 14 Digital input 14
28 15 Digital input 15
29 16 Digital input 16
30 L- Reference pole
31 LS+ Sensor supply for inputs 17…24
32 17 Digital input 17
33 18 Digital input 18
34 19 Digital input 19
35 20 Digital input 20
36 21 Digital input 21
37 22 Digital input 22
38 23 Digital input 23
39 24 Digital input 24
40 L- Reference pole

15 16

17 18 19 20

21 22 23 24 25 26

2017 18 19

21 22 23 24

9LS+ L-DI 10 11 12 13 14 15 16

25 26

27 28 29 30

31 32 33 34 35 36

3027 28 29

31 32 33 34

17LS+ L-DI 18 19 20 21 22 23 24

35 36

37 38 39 40

4037 38 39

Publication 1753-UM001C-EN-P - March 2010 55

Chapter 4 Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers

Safety-related Digital Output Terminals

123456

78910

1234

1L- L-DO 2

345678

56

10789

(2 A)(2 A)

Digital outputs are connected to these terminals.

Terminal
Number

1 L- Reference pole —
2 1 Digital output 1 0.5 A
3 2 Digital output 2 0.5 A
4 3 Digital output 3 0.5 A
5 4 Digital output 4 (for increased load) 2.0 A
6 5 Digital output 5 0.5 A
7 6 Digital output 6 0.5 A
8 7 Digital output 7 0.5 A
9 8 Digital output 8 (for increased load) 2.0 A
10 L- Reference pole —

Designation Function Current

Safety-related Analog Input Terminals

The GuardPLC 1800 controller features 8 single-ended analog inputs.
Differential analog inputs cannot be used on the GuardPLC 1800
controller. Two- or four-wire transmitters can be used. These devices
can be powered from the transmitter supply terminal of the GuardPLC
1800 controller or from an external power supply. See Appendix
example wiring diagrams.

IMPORTANT

AI

T1 I1 L- T2 I2 L-

Unused analog inputs must be short-circuited. See page 51.

AI

T3 I3 L- T4 I4 L-

47 48 49 50 51 5241 42 43 44 45 46 53 54 55 56 57 58 59 60 61 62 63 64

AI

T5 I4 L- T6 I6 L-

AI
T7 I7 L- T8 I8 L-

C for

56 Publication 1753-UM001C-EN-P - March 2010

Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers Chapter 4

The analog inputs are connected to these terminals.

Terminal Number Designation Function

41 T1 Transmitter supply 1
42 I1 Analog input 1
43 L- Reference pole
44 T2 Transmitter supply 2
45 I2 Analog input 2
46 L- Reference pole
47 T3 Transmitter supply 3
48 I3 Analog input 3
49 L- Reference pole
50 T4 Transmitter supply 4
51 I4 Analog input 4
52 L- Reference pole
53 T5 Transmitter supply 5
54 I5 Analog input 5
55 L- Reference pole
56 T6 Transmitter supply 6
57 I6 Analog input 6
58 L- Reference pole
59 T7 Transmitter supply 7
60 I7 Analog input 7
61 L- Reference pole
62 T8 Transmitter supply 8
63 I8 Analog input 8
64 L- Reference pole

Publication 1753-UM001C-EN-P - March 2010 57

Chapter 4 Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers

Safety-related High-speed Counter Terminals

Counters are connected to these terminals.

Terminal Number Designation Counter Function Gray Code Function

65 A1 Input A1 bit 0 (LSB)
66 B1 Input B1 bit 1
67 Z1 Input Z1 bit 2 (MSB)
68 L- Common reference pole
69 A2 Input A2 bit 0 (LSB)
70 B2 Input B2 bit 1
71 Z2 Input Z2 bit 2 (MSB)
72 L- Common reference pole

HSC

A1 B1 Z1 L- A2 B2 Z2 L-

65 66 67 68 71 7269 70

Wire the GuardPLC 1200 Controller

The GuardPLC 1200 controller has no LS+ terminal for a safety input
voltage source. Use the L+ supply terminal as the source for safety
input voltage. The four reference terminals, labeled I-, should be used
for the safety input voltage reference. This is a common reference for
all 20 inputs.

Lower Terminal Block

Not

I2 I4 I6 I8 I10 I12 I14 I16 I18 I20 I- I-

Used

13579 1113151719212325

2 4 6 8 10 12 14 16 18 20 22 24

I1 I3 I5 I7 I9 I11 I13 I15 I17 I19 I- I-

58 Publication 1753-UM001C-EN-P - March 2010

Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers Chapter 4

Terminal Number Designation Function

1 Not Used None
2 I1 Digital input 1
3 I2 Digital input 2
4 I3 Digital input 3
5 I4 Digital input 4
6 I5 Digital input 5
7 I6 Digital input 6
8 I7 Digital input 7
9 I8 Digital input 8
10 I9 Digital input 9
11 I10 Digital input 10
12 I11 Digital input 11
13 I12 Digital input 12
14 I13 Digital input 13
15 I14 Digital input 14
16 I15 Digital input 15
17 I16 Digital input 16
18 I17 Digital input 17
19 I18 Digital input 18
20 I19 Digital input 19
21 I20 Digital input 20
22 I- Reference pole
23 I- Reference pole
24 I- Reference pole
25 I- Reference pole

Upper Terminal Block

All eight of the digital output zero-voltage reference terminals are
common. Unlike the GuardPLC 1600 and GuardPLC 1800 controllers
or distributed I/O, which have an earth ground screw, the
GuardPLC 1200 controller’s earth ground should be wired to the PA
terminal, marked .

Publication 1753-UM001C-EN-P - March 2010 59

Chapter 4 Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers

L+

2 4 6 8 10 12 14 16 18 20 22 24 26 28

1357911131517192123252729

L-

(1)L-(2)

O1+ O2+ O3+ O4+ O5+ O6+ O7+ O8+ A1 B1 Z1 I-

(1)L+(2)

PA O1- O2- O3- O4- O5- O6- O7- O8- A2 B2 Z2 I-

Terminal Number Designation Function

1 L- 24V DC return path
2 L+ 24V DC power input
3 L- 24V DC return path
4 L+ 24V DC power input
5 PA Functional ground
6 O1+ Digital output 1
7 O1- Voltage reference for digital output 1
8 O2+ Digital output 2
9 O2- Voltage reference for digital output 2
10 O3+ Digital output 3
11 O3- Voltage reference for digital output 3
12 O4+ Digital output 4
13 O4- Voltage reference for digital output 4
14 O5+ Digital output 5
15 O5- Voltage reference for digital output 5
16 O6+ Digital output 6
17 O6- Voltage reference for digital output 6
18 O7+ Digital output 7
19 O7- Voltage reference for digital output 7
20 O8+ Digital output 8
21 O8- Voltage reference for digital output 8
22 A1 Universal signal input for counter 1
23 A2 Universal signal input for counter 2
24 B1 Signal input for counting direction for

counter 1

25 B2 Signal input for counting direction for

counter 2
26 Z1 Reset for counter 1
27 Z2 Reset for counter 2
28 I- Signal ground for counters 1 and 2
29 I- Signal ground for counters 1 and 2

60 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

5

Wire the GuardPLC 2000 Controller and I/O

Topic Page

Safety-related Digital Inputs 61
Safety-related Digital Outputs 62
Safety-Related Analog Inputs (1755-IF8) 62
High-speed Counter Module (1755-HSC) 63
Safety-related Analog Output Module (1755-OF8) 64
Current Draw 64
Wire the 1755-IB24XOB16 Digital I/O Module 65
Wire the 1755-IF8 Analog Input Module 66
Wire the 1755-OF8 Analog Output Module 66

Safety-related Digital Inputs

Wire the 1755-HSC Counter Modules 68

The status of digital inputs is indicated via status indicators when the
controller or module is in Run mode.

Follow the closed-circuit principle for external wiring when
connecting sensors. To create a safe state in the event of a fault, the
input signals revert to the de-energized state (0). The external line is
not monitored, but a wire break is interpreted as a safe (0) signal.

Input devices with their own dedicated power supply can also be
connected instead of contacts. The reference pole (L-) of the power
supply must then be connected to the reference pole of the input (L-).
See the wiring diagrams in Appendix

In general, the LS+ terminals, not L+ on the power supply connection,
should be used to supply voltage for safety inputs. Each LS+ features
individual short-circuit and EMC protection. Due to current limitations,
use LS+ for only the safety inputs on the same terminal plug.

An EN 61000-4.5 surge impulse can be read as a short-duration HI
signal in some modules. To avoid an error, either:

C for examples.

• install shielded input lines to prevent effects of surges in the

system.

• implement software filtering in the user program. A signal must

be present for at least two cycles before it is evaluated.

61Publication 1753-UM001C-EN-P - March 2010 61

Chapter 5 Wire the GuardPLC 2000 Controller and I/O

Safety-related Digital Outputs

The status of digital outputs is indicated via status indicators when the
controller or module is in Run mode.

GuardPLC 2000 controller outputs are rated at 2 A per point, but the
total load of all 16 outputs on a single module must not exceed 8 A.

If an overload occurs, the affected outputs are turned off. When the
overload is eliminated, the outputs are under the control of the
controller and are energized based on the user program code.

An output is in the safe state when it is de-energized. Therefore,
outputs are switched off when a fault that affects the safe control of
those outputs occurs.

For connection of a load, the reference pole L- of the corresponding
channel group must be used. Although L- poles are connected
internally to L- on the power supply input, it is strictly recommended
to connect the L- reference poles only to their corresponding output
group. EMC testing was performed in this manner.

TIP

Inductive loads can be connected without a protection diode on
the load, because there is a protection diode located within the
GuardPLC device. However, Rockwell Automation strongly
recommends that a protection diode be fitted directly to the
load to suppress any interference voltage. A 1N4004 diode is
recommended.

Safety-Related Analog Inputs (1755-IF8)

62 Publication 1753-UM001C-EN-P - March 2010

GuardPLC analog inputs provide for the unipolar measurement of
voltages from 0…10V, referenced to L-. A 10 kΩ shunt is used for
single-ended voltage signals. With a 500 Ω shunt resistor, currents
from 0…20 mA can also be measured.

The feeder lines should be no more than 300 m (984 ft.) in length. Use
shielded, twisted-pair cables, with the shields connected at one end,
for each measurement input. See the instructions for connecting
shielded cabling to the shield contact plate on page 48

.

Wire the GuardPLC 2000 Controller and I/O Chapter 5

Unused analog inputs must be short-circuited. Place wire jumpers to
ground on any inputs that are not used.

10

I5+/1-

11

I-

12

I6+/2-

13

I­ I7+/3-

14

I-

15

I8+/4-

16
17
18

1755-IF8

Wire

I-

Jumper

High-speed Counter Module (1755-HSC)

The 1755-HSC module features inputs for high-speed counting up to 1
MHz. These counters are 24-bit, and are configurable for either 5V or
24V DC. The counters can be used as a counter or as a decoder for
3-bit Gray Code inputs. As a counter, input A is the counter input,
input B is the counter direction input, and input Z is used for a reset.

The counter inputs must be connected by using shielded, twisted-pair
cables for each measurement input. The shields must be connected at
both ends. The input lines should be no more than 500 m (1640 ft) in
length. All reference (L-, C-, or I- depending on the controller)
connections are interconnected on the module in the form of common
reference pole.

Cables are clipped to the shield-contact plate when connecting
counter inputs. See the instructions for connecting shielded cabling to
the shield contact plate on page 48

IMPORTANT

D

Do not terminate unused high-speed counter inputs.

To be sure that counters are used in a safety-related manner (SIL3 in
accordance to IEC 61508), the whole system, including connected
sensors and encoders, must satisfy these safety requirements. Refer to
the GuardPLC Controllers Safety Reference Manual, publication

1753-RM002

, for more detailed information.

Publication 1753-UM001C-EN-P - March 2010 63

Chapter 5 Wire the GuardPLC 2000 Controller and I/O

Safety-related Analog Output Module (1755-OF8)

Current Draw

The 1755-OF8 module uses analog outputs to transfer analog values
from the user program into outputs ranging from ±10V DC and
0…20 mA. The relationship between the value in the user program
and the output value is linear and is displayed in this table.

Logic Value Output Voltage Output Current

0 0.00V 0.0 mA
1000 10.00V 20.0 mA

-1000 -10.00V na

The GuardPLC 2000 controller features several different modules.
These modules and their backplane current draw specifications are
listed in this table.

Cat. No. Current Draw at 3.3V DC Current Draw at 24V DC

1755-IB24XO16 0.3 A 0.5 A
1755-IF8 0.15 A 0.4 A
1755-OF8 0.15 A 0.4 A
1755-HSC 0.8 A 0.1 A
1755-L1 1.5 A 1.0 A

TIP

Connect the power supply, 1755-PB720, to the 24V DC supply
voltage. Refer to the GuardPLC 2000 Power Supply Installation
Instructions, publication 1755-IN007

The GuardPLC 2000 controller can draw up to 30 A. The majority
of this 30 A is used to source inputs and outputs. Only 1 A is
required to operate the CPU module.

, for detailed instructions.

64 Publication 1753-UM001C-EN-P - March 2010

Wire the GuardPLC 2000 Controller and I/O Chapter 5

Wire the 1755-IB24XOB16 Digital I/O Module

1755-

IB24XOB16

RUN

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18

19
20
21
22
23
24
25
26
27

28
29
30
31
32
33
34
35
36

37
38
39
40
41
42
43
44
45

ERR

LS+

LS+

LS+

L-

L-

I1
I2
I3
I4
I5
I6
I7
I8

I9
I10
I11
I12
I13
I14
I15
I16

I17
I18
I19
I20
I21
I22
I23
I24

O1
O2
O3
O4
O5
O6
O7
O8

O9
O10
O11
O12
O13
O14
O15
O16

Term ina l

Number

1 LS+ Digital input supply

2 I1 Digital input 1 25 I22 Digital input 22
3 I2 Digital input 2 26 I23 Digital input 23
4 I3 Digital input 3 27 I24 Digital input 24
5 I4 Digital input 4 28 L- Reference pole for

6 I5 Digital input 5 29 O1 Digital output 1
7 I6 Digital input 6 30 O2 Digital output 2
8 I7 Digital input 7 31 O3 Digital output 3
9 I8 Digital input 8 32 O4 Digital output 4

10 LS+ Digital input supply

11 I9 Digital input 9 34 O6 Digital output 6
12 I10 Digital input 10 35 O7 Digital output 7
13 I11 Digital input 11 36 O8 Digital output 8
14 I12 Digital input 12 37 L- Reference pole for

15 I13 Digital input 13 38 O9 Digital output 9
16 I14 Digital input 14 39 O10 Digital output 10
17 I15 Digital input 15 40 O11 Digital output 11
18 I16 Digital input 16 41 O12 Digital output 12
19 LS+ Digital input supply

20 I17 Digital input 17 43 O14 Digital output 14
21 I18 Digital input 18 44 O15 Digital output 15
22 I19 Digital input 19 45 O16 Digital output 16
23 I20 Digital input 20

Designation Function Terminal

This module is a combination I/O module featuring 24 safety-related
digital inputs and 16 safety-related digital outputs.

• Inputs: The sockets with pins 2…9, 11…18, and 20…27 provide

the 24 digital inputs I1…I24. Pins 1, 10, and 19 are the common
positive poles (LS+). Each group of 8 inputs has current limits of
100 mA.

• Outputs: The sockets with pins 29…36 and 38…45 provide the

16 digital outputs O1…O16. Pins 28 and 37 are the common
negative poles (L-) for the output loads.

• Each output channel can be loaded with 2 A, but the total load

of all 16 outputs must not exceed 8 A.

Designation Function

Number

24 I21 Digital input 21

for inputs 1…8

outputs 1…8

33 O5 Digital output 5

for inputs 9…16

outputs 9 …16

42 O13 Digital output 13

for inputs 17…24

Publication 1753-UM001C-EN-P - March 2010 65

Chapter 5 Wire the GuardPLC 2000 Controller and I/O

Wire the 1755-IF8 Analog Input Module

1755-

IF8

ERR

RUN

I1+

1

I-

2

I2+

3

I-

4

I3+

5

I-

6

I4+

7

I-

8
9

10

I5+/1-

11

I-

12

I6+/2-

13

I­ I7+/3-

14

I-

15

I8+/4-

16

I-

17
18

This module features 8 single-ended analog inputs or 4 differential
analog inputs. Two-wire or four-wire transmitters can be used. The
devices cannot be powered from the GuardPLC module. An external
power supply is required for all analog transmitters. Single-ended
transmitters connect between the Ix+ and I- terminals. For example:
pins 1 and 2, 3 and 4, 5 and 6. Differential transmitters connect
between Ix+ and x- terminals. For example, pins 1 and 10, 3 and 12, 5
and 14.

IMPORTANT

Unused channels must be short-circuited. See page 63.

All reference poles (I-) are internally connected.

Terminal Number Designation Function

1 I1+ Analog input 1
2 I- Reference pole for input 1
3 I2+ Analog input 2
4 I- Reference pole for input 2
5 I3+ Analog input 3
6 I- Reference pole for input 3
7 I4+ Analog input 4
8 I- Reference pole for input 4
9 shield connection signal ground
10 I5+/1- Analog input 5
11 I- Reference pole for input 5
12 I6/2- Analog input 6
13 I- Reference pole for input 6
14 I7+/3- Analog input 7
15 I- Reference pole for input 7
16 I8+/4- Analog input 8
17 I- Reference pole for input 8
18 shield connection signal ground

Wire the 1755-OF8 Analog

This module features 8 analog outputs. Devices cannot be powered
from the 1755-OF8 module. An external power supply is required for

Output Module

66 Publication 1753-UM001C-EN-P - March 2010

all analog output devices.

Wire the GuardPLC 2000 Controller and I/O Chapter 5

There are 4 reference poles for the 8 outputs. A pair of outputs share
a reference pole as shown below.

These outputs Share these Reference Poles

1 and 2 O1- and O2­3 and 4 O3- and O4­5 and 6 O5- and O6­7 and 8 O7- and O8-

Each group of 2 outputs is electrically isolated from the others.

RUN

1
2
3
4
5
6

7
8
9

10
11
12
13
14
15

16
17
18

1755-

OF8

ERR

O1+

O1-

O2+

O2-

O3+

O3-

O4+

O4-

O5+

O5-

O6+

O6-

O7+
O7­O8+
O8-

IMPORTANT

If an unused channel is defined as a current output (software
configuration set to current output), the output channel has to
be short-circuited. Place jumpers into these outputs and tighten
the screws.

IMPORTANT

If an unused channel is defined as a voltage output (software
configuration set to voltage output), the unused outputs must be
left open. Short-circuiting a unused voltage output may cause
damage to the output.

Terminal Number Designation Function

1 O1+ Analog output 1
2 O1- Group 1 reference pole
3 O2+ Analog output 2
4 O2- Group 1 reference pole
5 O3+ Analog output 3
6 O3- Group 2 reference pole
7 O4+ Analog output 4
8 O4- Group 2 reference pole
9 shield connection signal ground
10 O5+ Analog output 5
11 O5- Group 3 reference pole
12 O6+ Analog output 6
13 O6- Group 3 reference pole
14 O7+ Analog output 7
15 O7- Group 4 reference pole
16 O8+ Analog output 8
17 O8- Group 4 reference pole
18 shield connection signal ground

Publication 1753-UM001C-EN-P - March 2010 67

Chapter 5 Wire the GuardPLC 2000 Controller and I/O

Wire the 1755-HSC Counter Modules

1755-

HSC

RUN

ERR

C-

1

A1

2

B1

3

Z1

4

C1

5

C-

6

C-

7

C-

8

C-

9

C-

10

A2

11

B2

12

Z2

13

C2

14

C-

15

C-

16

C-

17

C-

18

19
20
21
22
23
24
25
26
27

L­1
2

3
4

L­L­L­L-

This module contains 2 high-speed counters and 4 digital outputs.
Although the 4 digital outputs are located on the 1755-HSC module,
they cannot be driven by counter presets. The 4 digital outputs are
driven by software, just as on the 1755-IB24XOB16 module.

The nominal current per output is limited to ≤ 0.5 A. Currents > 0.5 A
are regarded as overload. The overload is limited to ≤ 11 A per
output, or ≤ 2 A if all four outputs are overloaded at the same time.
With an overload of 2 A, the output voltage drops to 18V.

All counter common reference poles, C-, share the same path. All
digital output common reference poles, L-, share the same path, but
are electrically isolated from the C- pins.

Terminal Number Designation Function

1 C- Common reference pole
2 A1 Signal input for counter 1
3 B1 Counting direction input for counter 1
4 Z1 Reset input for counter 1
5 C1 no function
6 C- Common reference pole
7 C- Common reference pole
8 C- Common reference pole
9 C- Common reference pole
10 C- Common reference pole
11 A2 Signal input for counter 2
12 B2 Counting direction input for counter 2
13 Z2 Reset input for counter 2
14 C2 no function
15 C- Common reference pole
16 C- Common reference pole
17 C- Common reference pole
18 C- Common reference pole
19 L- Reference pole for digital outputs
20 1 Digital output 1
21 2 Digital output 2
22 3 Digital output 3
23 4 Digital output 4
24 L- Reference pole for digital outputs
25 L- Reference pole for digital outputs
26 L- Reference pole for digital outputs
27 L- Reference pole for digital outputs

68 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

Wire 1753-IB16, 1753-OB16, and
1753-IB20XOB8 Modules

Topic Page

Safety-related Digital Inputs 69
Safety-related Digital Outputs 70
Power Supply Connections 70
Wire the 1753-IB16 Input Module 71
Wire the 1753-OB16 Output Module 73
Wire the 1753-IB20XOB8 Combination Module 75

6

Safety-related Digital Inputs

The status of digital inputs is indicated via status indicators when the
module is in Run mode.

Follow the closed-circuit principle for external wiring when
connecting sensors. To create a safe state in the event of a fault, the
input signals revert to the de-energized state (0). The external line is
not monitored, but a wire break is interpreted as a safe (0) signal.

The GuardPLC 1600 and GuardPLC 1800 controllers provide power to
input devices through their LS+ terminals. However, input devices
with their own dedicated power supply can also be connected instead
of contacts. The reference pole (L-) of the power supply must then be
connected to the reference pole (L-) of the appropriate GuardPLC
input group. See the wiring diagrams in Appendix

In general, the LS+ terminals, not L+ on the power supply connection,
should be used to supply voltage for safety inputs. Each LS+ features
individual short-circuit and EMC protection. Due to current limitations,
use LS+ for only the safety inputs on the same terminal plug.

An EN 61000-4.5 surge impulse can be read as a short-duration HI
signal in some modules. To avoid an error, either:

C for examples.

• install shielded input lines to prevent effects of surges in the

system.

• implement software filtering in the user program. A signal must

be present for at least two cycles before it is evaluated.

69Publication 1753-UM001C-EN-P - March 2010 69

Chapter 6 Wire 1753-IB16, 1753-OB16, and 1753-IB20XOB8 Modules

Safety-related Digital Outputs

The status of digital outputs is indicated via status indicators when the
module is in RUN mode.

GuardPLC outputs are rated to either 0.5 A or 1.0 A at an ambient
temperature of 60 °C (140 °F). At an ambient temperature of 50 °C
(122 °F), outputs rated at 1.0 A increase to 2.0 A.

If an overload occurs, the affected outputs are turned off. When the
overload is eliminated, the outputs are under the control of the
controller and are energized based on the user program code.

An output is in the safe state when it is de-energized. Therefore,
outputs are switched off when a fault that affects the safe control of
those outputs occurs.

For connection of a load, the reference pole L- of the corresponding
channel group must be used. Although L- poles are connected
internally to L- on the power supply input, it is strictly recommended
to connect the L- reference poles only to their corresponding output
group. EMC testing was performed in this manner.

TIP

Inductive loads can be connected without a protection diode on
the load, because there is a protection diode located within the
GuardPLC device. However, Rockwell Automation strongly
recommends that a protection diode be fitted directly to the
load to suppress any interference voltage. A 1N4004 diode is
recommended.

Power Supply Connections

ATTENTION

The supply voltage is connected via a 4-pin connector that
accommodates wire sizes up to 2.5 mm

connect one wire to L+ and one wire to L-. Both L+ and L- terminals
are internally connected. The other terminal can be used to
daisy-chain 24V DC to additional devices. The power supply
connector is rated to 10 A.

70 Publication 1753-UM001C-EN-P - March 2010

Before connecting the power supply, check for correct polarity,
value and ripple.

Do not reverse the L+ and L- terminals or damage to the
controller will result. There is no reverse polarity protection.

2

(14 AWG). You only need to

Wire 1753-IB16, 1753-OB16, and 1753-IB20XOB8 Modules Chapter 6

Wire the 1753-IB16 Input Module

The 1753-IB16 input module features 16 digital inputs and 4 pulse test
sources.

Safety-related Digital Inputs

DI

1LS+ LS+ LS+ LS+L-

234

123456

1 2 3 4 5 6 7 8 9 101112 131415161718 192021222324

Digital inputs are connected to these terminals.

Terminal Number Designation Function

1 LS+ Sensor supply for inputs 1…4
2 1 Digital input 1
3 2 Digital input 2
4 3 Digital input 3
5 4 Digital input 4
6 L- Reference pole
7 LS+ Sensor supply for inputs 5…8
8 5 Digital input 5
9 6 Digital input 6
10 7 Digital input 7
11 8 Digital input 8
12 L- Reference pole
13 LS+ Sensor supply for inputs 9…12
14 9 Digital input 9
15 10 Digital input 10
16 11 Digital input 11
17 12 Digital input 12
18 L- Reference pole
19 LS+ Sensor supply for inputs 13 …16
20 13 Digital input 13
21 14 Digital input 14
22 15 Digital input 15
23 16 Digital input 16
24 L- Reference pole

DI

5L-

678

789101112

DI

9L-

10 11 12

13 14 15 16 17 18

DI

13 L-

14 15 16

19 20 21 22 23 24

Publication 1753-UM001C-EN-P - March 2010 71

Chapter 6 Wire 1753-IB16, 1753-OB16, and 1753-IB20XOB8 Modules

Pulse Test Sources

The 1753-IB16 input module is equipped with four pulse test sources
that can be software-configured for pulse testing of safety inputs, if
required. Due to minimal current capacity, these pulse test sources
cannot be used as outputs if they are not configured as pulse test
sources.

PO PULSE TEST

L- 1 L-234

25 26 27 28 29 30

25 26 27 28 29 30

ATTENTION

Pulse test sources must not be used as safety-related outputs.

For information on configuring pulse test sources for line control, see

Chapter

11. See Appendix C for example wiring diagrams.

Pulse test sources are connected to these terminals.

Terminal Number Designation Function

25 L- Reference pole
26 1 Pulse test source 1
27 2 Pulse test source 2
28 3 Pulse test source 3
29 4 Pulse test source 4
30 L- Reference pole

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Wire 1753-IB16, 1753-OB16, and 1753-IB20XOB8 Modules Chapter 6

Wire the 1753-OB16 Output Module

Operating Voltage Considerations

The 1753-OB16 output module has a total current capacity (16 A)
higher than the terminal block current limitation (10 A). Therefore, it
features two separate operating voltage supply connections if more
than 10 A is used by the module. The two output groups are shown
below. Each group has a current capacity of 8 A.

Group 2Group 1

123456

L-L- L+ L+

24V DC

24 V DC

RUN

ERROR

PROG
FORCE
FAULT

OSL

BL

GuardPLC Ethernet

10/100 BaseT

(—)2(—)

1

123456

1L- L-DO1 2 3 4

9L- L-DO1 10 11 12

13 14 15 16 17 18

13 14 15 16 17 18

Group Outputs

1 1, 2, 3, 4, and 9, 10, 11,12
2 5, 6, 7, 8 and 13, 14, 15, 16

L-L- L+ L+

24V DC

789101112

789101112

5L- L-DO2 6 7 8

13L- L-DO2 14 15 16

19 20 21 22 23 24

19 20 21 22 23 24

1753-OB16

16 DC Outputs

Safety-related Digital Outputs

The module has 16 digital outputs (DO1 to DO16) whose status is
indicated via status indicators.

DO1

1LS+ LS+

234

123456

123456 789101112

DO1

LS+

9L-

10 11 12

13 14 15 16 17 18

13 14 15 16 17 18

Each output is rated for up to 1 A at 60 °C (140 °F) or 2 A at
40 °C (104 °F). However, each group of 8 outputs may not exceed 8 A
total. For heat dissipation, intersperse high-current and low-current
outputs so that all the high-current outputs are not next to each other.

DO2

L-

DO2
LS+

5L-

678

789101112

13 L-

14 15 16

19 20 21 22 23 24

19 20 21 22 23 24

Publication 1753-UM001C-EN-P - March 2010 73

Chapter 6 Wire 1753-IB16, 1753-OB16, and 1753-IB20XOB8 Modules

The digital outputs are connected to these terminals.

Terminal Number Designation Function

1 L- Reference pole
2 1 Digital output 1
3 2 Digital output 2
4 3 Digital output 3
5 4 Digital output 4
6 L- Reference pole
7 L- Reference pole
8 5 Digital output 5
9 6 Digital output 6
10 7 Digital output 7
11 8 Digital output 8
12 L- Reference pole
13 L- Reference pole
14 9 Digital output 9
15 10 Digital output 10
16 11 Digital output 11
17 12 Digital output 12
18 L- Reference pole
19 L- Reference pole
20 13 Digital output 13
21 14 Digital output 14
22 15 Digital output 15
23 16 Digital output 16
24 L- Reference pole

74 Publication 1753-UM001C-EN-P - March 2010

Wire 1753-IB16, 1753-OB16, and 1753-IB20XOB8 Modules Chapter 6

Wire the 1753-IB20XOB8 Combination Module

The remote I/O module features 20 digital inputs and 8 digital outputs
whose status is indicate via status indicators.

Safety-related Digital Inputs

DI

1LS+ LS+ LS+ LS+ LS+L-

234

13 14 15 16 17 18

The digital inputs are connected to these terminals.

Terminal Number Designation Function

13 LS+ Sensor supply for inputs 1…4
14 1 Digital input 1
15 2 Digital input 2
16 3 Digital input 3
17 4 Digital input 4
18 L- Reference pole
19 LS+ Sensor supply for inputs 5…8
20 5 Digital input 5
21 6 Digital input 6
22 7 Digital input 7
23 8 Digital input 8
24 L- Reference pole
25 LS+ Sensor supply for inputs 9…12
26 9 Digital input 9
27 10 Digital input 10
28 11 Digital input 11
29 12 Digital input 12
30 L- Reference pole
31 LS+ Sensor supply for inputs 13…16
32 13 Digital input 13
33 14 Digital input 14
34 15 Digital input 15
35 16 Digital input 16
36 L- Reference pole
37 LS+ Sensor supply for inputs 17…20
38 17 Digital input 17
39 18 Digital input 18
40 19 Digital input 19
41 20 Digital input 20
42 L- Reference pole

DI

5L-

678

19 20 21 22 23 24

19 20 21 22 23 2413 14 15 16 17 18 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

DI

9L-

10 11 12

25 26 27 28 29 30

DI

13 L-

14 15 16

31 32 33 34 35 36

DI

17 L-

18 19 20

37 38 39 40 41 42

Publication 1753-UM001C-EN-P - March 2010 75

Chapter 6 Wire 1753-IB16, 1753-OB16, and 1753-IB20XOB8 Modules

Safety-related Digital Outputs

123456

1234

56

1L- L-DO 2

34

(2A)

789101112

78910

11 12

5L- L-DO 6

7 8

(2A)

The digital outputs are connected to these terminals.

Terminal
Number

1 L- Reference pole —
2 1 Digital output 1 0.5 A
3 2 Digital output 2 0.5 A
4 3 Digital output 3 0.5 A
5 4 Digital output 4 (for increased load) 2.0 A
6 L- Reference pole —
7 L- Reference pole —
8 5 Digital output 5 0.5 A
9 6 Digital output 6 0.5 A
10 7 Digital output 7 0.5 A
11 8 Digital output 8 (for increased load) 2.0 A
12 L- Reference pole —

Designation Function Current

76 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

7

Wire and Configure the 1753-IB8XOB8 Module

Topic Page

Safety-related Digital Inputs 77
Safety-related Digital Outputs 78
Pulse Test Sources 81

The module features 8 digital inputs, 8 positive-switching digital
outputs, 2 negative-switching digital outputs, and 2 pulsed outputs.

Safety-related Digital Inputs

The status of the module’s 8 digital inputs is indicated via status
indicators when the controller or module is in Run mode.

LS+ is a voltage source that provides 24V DC for a group of four
inputs. There are two groups on the module. If devices require
24V DC to operate and use the same power source as the GuardPLC
module, wire the outputs of the device directly to inputs on the
GuardPLC module. Devices with their own dedicated power supply
can also be connected instead of contacts. Connect the reference pole
of the signal source to the L- reference pole of the input. See the
wiring diagrams in Appendix

Follow the closed-circuit principle for external wiring when
connecting sensors. To create a safety state in the event of a fault, the
input signals revert to the de-energized state (0). The external line is
not monitored, but a wire break is interpreted as a safe (0) signal.

C for examples.

77Publication 1753-UM001C-EN-P - March 2010 77

Chapter 7 Wire and Configure the 1753-IB8XOB8 Module

Terminal Connections

1LS+ L-

234

DI

19 20 21 22 23 24

LS+ 5 L-

678

DI

25 26 27 28 29 30

19 20 21 22 23 24

25 26 27 28 29 30

See the wire size and terminal torques specifications on page 290.
Digital inputs are connected to these terminals.

Terminal Number Designation Function

19 LS+ Sensor supply for inputs 1… 4
20 1 Digital input 1
21 2 Digital input 2
22 3 Digital input 3
23 4 Digital input 4
24 L- Reference pole
25 LS+ Sensor supply for inputs 5 …8
26 5 Digital input 5
27 6 Digital input 6
28 7 Digital input 7
29 8 Digital input 8
30 L- Reference pole

Safety-related Digital Outputs

Surge on Digital Inputs

An EN 61000-4.5 surge impulse can be read as a short-duration HI
signal in some modules. To avoid an error, either:

• install shielded input lines to prevent effects of surges in the

system.

• implement software filtering in the user program. A signal must

be present for at least two cycles before it is evaluated.

The module has 8 positive-switching digital outputs that switch
+24V DC and two negative-switching digital outputs that switch
24V COM. Their status is indicated via status indicators.

The positive and negative-switching digital outputs can be connected
in a one-pole or two-pole manner.

If configured for one-pole operation, use the reference pole L- for the
positive-switching outputs and reference pole S+ for the

78 Publication 1753-UM001C-EN-P - March 2010

Wire and Configure the 1753-IB8XOB8 Module Chapter 7

negative-switching outputs. The total output current of the module is
limited to 8 A and is generated from the 24V of the system.

If configured for two-pole operation, the positive-switching output
DO4 operates with the negative-switching output DO4- and the
positive-switching output DO8 operates with the negative-switching
output DO8-. Line control is carried out for detection of an external
short-circuit between positive and negative-switching outputs. A
switch-on delay is necessary for inductive or capacitive load or lamp
load because the inrush of these loads may be mistakenly detected as
a short-circuit. This delay is set in the RSLogix Guard PLUS! Hardware
Management via the Switch-on delay signal at the negative-switching
output variables. The delay can be set from 0…30 ms, in 1 ms
increments. An external line break will not be detected.

An output is in a safety state when it is de-energized. When a fault
occurs, all outputs are switched off.

Outputs 1…3 and 5…7 can have a load of 0.5 A. Outputs 4 and 8 can
each have a load of 1 A at the maximum ambient temperature 60 °C
(140 °F), 2 A at an ambient temperature of 40 °C (104 °F).

The negative-switching outputs DO4- and DO8- can supply up to 1 A
at the maximum ambient temperature of 60 °C (140 ° F), 2 A at an
ambient temperature of 40 °C (104 °F).

With an overload, one or all of the outputs are turned off. When the
overload is eliminated, the outputs are activated again.

Signals for Output Configuration

Set up these signals for 1753-IB8XOB8 modules by using the Outputs
tab of the digital outputs Signal Connections dialog box in RSLogix
Guard PLUS! software.

L+ Switching L-Switching Description Notes

DO1[xx].Value
(outputs 1 to 8)

— DO2[xx].2-pole Configures the channel for 2-pole

— Switch-on delay Sets switch-on delay for 2-pole tests, due

DO2[xx].Value
(outputs 4- and 8-)

Output value for digital output channels 1 = output is set

0 = output is not set; no current
1 = channel DO2[01] (4-) is used for 2-pole operation

operation

to lamp load, inductive and capacitive load

with channel DO1[04] or channel DO2[02] (8-)is used
for 2-pole operation with channel DO1[08]
0 = channel DO2[xx] is not used for 2-pole operation.

See Appendix

Publication 1753-UM001C-EN-P - March 2010 79

B for a complete list of 1753-IB8XOB8 variables.

Chapter 7 Wire and Configure the 1753-IB8XOB8 Module

Terminal Connections

123456

123456

PO

1L- S+

24-8-

DO

789101112

789101112

DO

1L- L-

234

13 14 15 16 17 18

13 14 15 16 17 18

DO

5L- L-

678

See the wire size and terminal torques specifications on page 290.
Digital outputs are connected to these terminals.

Terminal
Number

4 4- Negative switching digital output 4 (for increased load or

5 8- Negative switching digital output 8 (for increased load or

6 S+ Reference pole for negative switching outputs

7 L- Reference pole for positive-switching outputs
8 1 Digital output 1
9 2 Digital output 2
10 3 Digital output 3
11 4 Digital output 4 (for increased load or bi-polar output)

Designation Function

bi-polar output)

bi-polar output)

(short-circuit protection)

12 L- Reference pole for positive-switching outputs
13 L- Reference pole for positive-switching outputs
14 5 Digital output 5
15 6 Digital output 6
16 7 Digital output 7
17 8 Digital output 8 (for increased load or bi-polar output)
18 L- Reference pole for positive-switching outputs

For connection of a load, the reference pole L- of the channel group
must be used. Although L- at terminals 7 and 12 and at terminals 13
and 18 are connected internally to L- on the power supply input, it is
strictly recommended to use 7 and 12 for outputs 1…4 only and 13
and 18 for outputs 5…8 only. EMC testing was performed in this
manner.

80 Publication 1753-UM001C-EN-P - March 2010

1-pole Connection Examples

Wire and Configure the 1753-IB8XOB8 Module Chapter 7

Pulse Test Sources

DO 8-

S+

TIP

DO 1

DO 2

DO 3

DO 4L-L-

DO 4-

Inductive loads can be connected without a protection diode on
the load. However, Rockwell Automation strongly recommends
that a protection diode be fitted directly to the load to suppress
any interference voltage.

2-pole Connection Example

DO4-

DO8-

DO4

DO8

There are two digital pulse test sources (PO) used for line control
monitoring of digital inputs. For information on configuring pulse test
sources for line control, see Chapter

11.

Pulse test sources are connected to these terminals.

123456

123456

PO

Terminal Number Designation Function

1 L- Reference pole
2 1 Pulsed output 1
3 2 Pulsed output 2

ATTENTION

Pulse test sources must not be used as safety-related outputs.

1L- S+

24-8-

DO

Publication 1753-UM001C-EN-P - March 2010 81

Chapter 7 Wire and Configure the 1753-IB8XOB8 Module

Notes:

82 Publication 1753-UM001C-EN-P - March 2010

Introduction

Chapter

Wire and Configure the 1753-IB16XOB8
Module

Topic Page

Safety-related Digital Inputs 83
Safety-related Digital Outputs 86
Monitor for Line Short Line Break 91
Pulse Test Sources 93

The module features 16 digital inputs, 8 two-pole (8
positive-switching and 8 negative-switching) digital outputs, and 2
pulsed outputs.

8

Safety-related Digital Inputs

The status of digital inputs is indicated via status indicators when the
module is in Run mode.

LS+ is a voltage source that provides 24V DC for a group of four
inputs. There are four groups on the module. If devices require
24V DC to operate and use the same power source as the GuardPLC
module, wire the outputs of the device directly to inputs on the
GuardPLC module. Devices with their own dedicated power supply
can also be connected instead of contacts. Connect the reference pole
of the signal source to the L- reference pole of the input. See the
wiring diagrams in Appendix C

The safety state of an input is indicated by a 0 signal being passed to
the user program logic. If the test routines detect a fault in the digital
inputs, a 0-signal is processed in the user program for the defective
channel. When a fault occurs, the inputs are switched off (0) and the
fault status indicator is activated.

The sensor supplies, LS+, supply a default current of 40 mA that is
buffered for 20 ms in case of a power failure. If a higher current is
needed, two unbuffered supplies of 1 A can be switched on by using
the DI Supply [xx] system signal in the application program. This
supply feeds the neighboring input channel group. The status of this

for examples.

83Publication 1753-UM001C-EN-P - March 2010 83

Chapter 8 Wire and Configure the 1753-IB16XOB8 Module

supply is read and the supply is switched off if an overcurrent
condition occurs. This supply is protected by a current limiting device.

L+ Not Buffered

Current

Limiting

40 mA

LS+ LS+ LS+ LS+ LS+ LS+ LS+ LS+

33 34 43 44 53 54 63 64Terminal Number

Current

Limiting

1 A

L+ Buffered L+ Buffered

Current

Limiting

40 mA

Current

Limiting

40 mA

L+ Not Buffered

Current

Limiting

1 A

Follow the closed-circuit principle for external wiring when
connecting sensors. To create a safe state in the event of a fault, the
input signals revert to the de-energized state (0). Although the
external line is not monitored, a wire break is interpreted as a safe
0-signal. Unused inputs must not be terminated.

Current

Limiting

40 mA

An EN 61000-4.5 surge impulse can be read as a short-duration HI
signal in some modules. To avoid an error, either:

• install shielded input lines to prevent effects of surges in the

system.

• implement software filtering in the user program. A signal must

be present for at least two cycles before it is evaluated.

84 Publication 1753-UM001C-EN-P - March 2010

Terminal Connections

LS+ LS+ 1 2 3 4 L-L-

LS+ LS+ 5 6 7 8 L-L- LS+ LS+ 9 10 11 12 L-L- LS+ LS+ 13 14 15 16 L-L-

Wire and Configure the 1753-IB16XOB8 Module Chapter 8

33 34 35 36 37 38 39 40 41 42

43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

See the wire size and terminal torques specifications on page 290.
Digital inputs are connected to these terminals.

Terminal Number Designation Function

33 LS+ Sensor supply for inputs 1… 4

40 mA buffered/1 A unbuffered

34 LS+ Sensor supply for inputs 1…4

40 mA buffered/1 A unbuffered
35 1 Digital input 1
36 2 Digital input 2
37 3 Digital input 3
38 4 Digital input 4
39 L- Reference pole
40 L- Reference pole
41 Ground Shield
42 Ground Shield
43 LS+ Sensor supply for inputs 5…8

40 mA buffered/1 A unbuffered
44 LS+ Sensor supply for inputs 5…8

40 mA buffered/1 A unbuffered
45 5 Digital input 5
46 6 Digital input 6
47 7 Digital input 7
48 8 Digital input 8
49 L- Reference pole
50 L- Reference pole
51 Ground Shield
52 Ground Shield
53 LS+ Sensor supply for inputs 9…12

40 mA buffered/1 A unbuffered
54 LS+ Sensor supply for inputs 9…12

40 mA buffered/1 A unbuffered
55 9 Digital input 9
56 10 Digital input 10
57 11 Digital input 11
58 12 Digital input 12
59 L- Reference pole
60 L- Reference pole
61 Ground Shield
62 Ground Shield

Publication 1753-UM001C-EN-P - March 2010 85

Chapter 8 Wire and Configure the 1753-IB16XOB8 Module

Terminal Number Designation Function

63 LS+ Sensor supply for inputs 13…16

64 LS+ Sensor supply for inputs 13…16

65 13 Digital input 13
66 14 Digital input 14
67 15 Digital input 15
68 16 Digital input 16
69 L- Reference pole
70 L- Reference pole
71 Ground Shield
72 Ground Shield

40 mA buffered/1 A unbuffered

40 mA buffered/1 A unbuffered

Safety-related Digital Outputs

The module has 8 digital output pairs, each with a positive- and
negative-switching output. The digital outputs are not electrically
isolated.

An output is in the safe state when it is de-energized. Therefore,
outputs are switched off when a fault that affects the safety control of
those outputs occurs.

If an overload occurs, the affected output is switched off. If the total
current exceeds 9 A, all eight outputs are switched off. When the
overload is eliminated, the outputs are activated again according to
their current software-driven state.

Configuration

The digital outputs can be configured three ways.

• 1-pole switch (no line monitoring)

• 2-pole switch (with or without line monitoring)

• 3-pole switch (2-pole with common reference)

86 Publication 1753-UM001C-EN-P - March 2010

Wire and Configure the 1753-IB16XOB8 Module Chapter 8

1-Pole Connection

For 1-pole applications, all 8 positive-switching and all 8
negative-switching outputs are available, for a total of 16 outputs. If
you are using a positive-switching output, connect the other side of
the output to S-. If you are using a negative-switching output, connect
the other side of the output to S+.

Line monitoring with a 1-pole connection is not possible.

ATTENTION

You must not connect the positive-switching output directly to
an external L- load or connect the negative-switching output
directly to an external L+ load. You must use the S+ and S­terminals.

For 1-pole connections, inductive loads can be connected without a
protection diode on the load, because there is a protection diode
located within the GuardPLC module. However, Rockwell Automation
strongly recommends that a protection diode be fitted directly to the
load to suppress any interference voltage. A 1N4004 diode is
recommended.

1-pole Configuration

S+

1753-IB16XOB8

1+
1-

S-

2+

Actuator

2-

Publication 1753-UM001C-EN-P - March 2010 87

Chapter 8 Wire and Configure the 1753-IB16XOB8 Module

2-Pole Connection

If the outputs are configured for 2-pole operation, 8 outputs are
available. Each of the 8 outputs switch both L+ and L-. 2-pole outputs
(without line monitoring) are wired to both the positive-switch and
negative-switch of a single channel, 2+ and 2- for example.

2+

2-

IMPORTANT

ATTENTION

ATTENTION

1753-IB16XOB8 Actuator

The corresponding channels for 2-pole connections must be
configured for 2-pole operation by using the system variable
DO[xx].2-pole. See Appendix B

for more information on system

variables.

The positive-switching output must be wired to an output along
with the corresponding negative-switching output of the same
channel. Negative- or positive-switching outputs must not span
different channels unless they are connected in pairs (see

3-pole Connection With Line Monitoring

on page 89).

Inductive loads must be connected with a protection diode on
the load in 2-pole operation.

2-pole Configuration

88 Publication 1753-UM001C-EN-P - March 2010

Wire and Configure the 1753-IB16XOB8 Module Chapter 8

3-pole Connection With Line Monitoring

Two 2-pole channels can support dual-channel devices with only a
single reference connection. If line monitoring is required, the
channels must be configured in pairs, using the system parameter
DO[xx][xx].in pairs. There are four pairs allowed: channels 1 and 2,
channels 3 and 4, channels 5 and 6, and channels 7 and 8.

Line monitoring is accomplished by switching off one channel while
the second channel is tested for wiring faults.

A detected line fault is reported by the module’s error codes. See

Appendix B

for error code information.

3-pole Configuration

1753-IB16XOB8

IMPORTANT

Load

(drive, valve)

Inductive loads must be connected with a protection diode on
the load for 3-pole connections.

Publication 1753-UM001C-EN-P - March 2010 89

Chapter 8 Wire and Configure the 1753-IB16XOB8 Module

Terminal Connections

See the wire size and terminal torques specifications on page 290.
Digital outputs are connected to these terminals.

123456 87

S+

S+ S+ S+ S- S- S- S-

91011121314 1615

1- 1+ 2- 2+ 3- 3+ 4+4- 5- 5+ 6- 6+ 7- 7+ 8+8-

DO DO

17 18 19 20 21 22 2423

Terminal

Designation Function

Number

1 S+ Reference pole for negative-switching digital outputs
2 S+ Reference pole for negative-switching digital outputs
3 S+ Reference pole for negative-switching digital outputs
4 S+ Reference pole for negative-switching digital outputs
5 S- Reference pole for positive-switching digital outputs
6 S- Reference pole for positive-switching digital outputs
7 S- Reference pole for positive-switching digital outputs
8 S- Reference pole for positive-switching digital outputs
9 1- Digital output 1, negative-switching
10 1+ Digital output 1, positive-switching
11 2- Digital output 2, negative-switching
12 2+ Digital output 2, positive-switching
13 3- Digital output 3, negative-switching
14 3+ Digital output 3, positive-switching
15 4- Digital output 4, negative-switching
16 4+ Digital output 4, positive-switching
17 5- Digital output 5, negative-switching
18 5+ Digital output 5, positive-switching
19 6- Digital output 6, negative-switching
20 6+ Digital output 6, positive-switching
21 7- Digital output 7, negative-switching
22 7+ Digital output 7, positive-switching
23 8- Digital output 8, negative-switching
24 8+ Digital output 8, positive-switching

90 Publication 1753-UM001C-EN-P - March 2010

Wire and Configure the 1753-IB16XOB8 Module Chapter 8

Monitor for Line Short Line Break

The Line Short Line Break (LSLB) monitoring measures the impedance
of a load and allows the modules to detect the following faults, when
LSLB monitoring is configured by using the system variable
DO[xx].LSLB:

• Short-circuit between DO+ and DO-

• Short-circuit DO+ and external L+

• Short-circuit between DO+ and external L-

• Short-circuit between DO- and external L+

• Short-circuit between DO- and external L-

• Line break between DO+ and DO-

Line monitoring of the digital outputs is possible only when outputs
are configured for 2-pole operation and both poles DO[xx]- and
DO[xx]+ are wired to a load. A detected line fault is reported in the
system signal DO[xx].+Error Code or DO[xx].-Error Code. See

Appendix B

There are two kinds of line monitoring.

• Line monitoring for lamp loads and inductive loads

• Line monitoring for resistive, capacitive loads

for information on system signals.

For both types, you must configure a period and time for line
monitoring by using the system signal variables described on page 93

Line Monitoring for Lamp and Inductive Loads

For short-circuit detection, a 24V impulse with a duration of 500 μs is
switched in the output circuit. Afterwards, a 10V signal is set for the
duration of the monitoring time to detect a line break.

To configure this type of line monitoring:

• set a DO.LSLB period and DO.LSLB time.

• set the output DO[xx].2-pole signal to 1 (TRUE).

• set the output DO[xx].LSLB monitoring signal to 1 (TRUE).

• set the output DO[xx].LS monitoring with reduced voltage signal

to 0 (FALSE).

See Required Signals for Line Monitoring

on page 93.

.

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Line Monitoring with Reduced Voltage for Resistive, Capacitive
Loads

For line monitoring, a 10V signal is switched on in the output circuit
for the duration of the monitoring time. This kind of line monitoring is
designed for resistive or resistive-capacitive loads. There is no
short-circuit detection for these types of loads.

To configure this type of line monitoring:

• set a DO.LSLB period and DO.LSLB time.

• set the output DO[xx].2-pole signal to 1 (TRUE).

• set the output DO[xx].LSLB monitoring signal to 1 (TRUE).

• set the output DO[xx].LS monitoring with reduced voltage signal

to 1 (TRUE).

See Required Signals for Line Monitoring

ATTENTION

During the 10V test to detect a line break, DO+ is at 24V and

on page 93.

DO- is at 14V. If DO- is shorted to 0V DC, then there is 24V at
the output for the duration of the monitoring time, which could
turn on the actuator.

During line monitoring time, a 10V signal is impressed at the
load (relay, actuator). This reduced voltage level (10V) of line
monitoring, is normally not enough to switch the load.

Period and Monitoring Times

You must set a period and monitoring time for line control. These
configured times affect all channels that are set for line monitoring.

During monitoring time, readbacks occur at intervals of 1 ms. If no
errors occur, the output is set per the application program.

ATTENTION

The duration of monitoring time adds to the cycle time.

TIP

There are 4 tests during the LSLB test period (DO.LSLBperiod).
In principle, this means that there will be a test every 1/4 of the
period. So if the period is 1 second, there will be a test every
250 ms. If the LSLB time duration (DO.LSLB time) is 20 ms, there
will be 230 ms between 20 ms tests.

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Required Signals for Line Monitoring

Line monitoring must be configured by using these system signals for
1753-IB16XOB8 modules on the Outputs tab of the digital outputs
Signal Connections dialog box in RSLogix Guard PLUS! software.

Name Description Setting

DO.LSLB period The time between steps in Line Short Line

Break (LSLB) monitoring

DO.LSLB time The duration of LSLB monitoring Values in one millisecond increments from

DO[xx].2-pole Configures the module for 2-pole operation 1 = 2-pole operation.

DO[xx].+Value Output value for DO channels (DO+) 1-pole (Value: 0 or 1).

DO[xx].-Value Output value for DO channels (DO-) 1-pole (Value: 0 or 1).

DO[xx].LSLB monitoring Configures line control 1 = set for LSLB (line control)

DO[xx].LS monitoring with reduced
voltage

Configures line control with reduced voltage 1 = reduced signal voltage level

Values in one second increments from
1…100.

0…50 ms. The default is 0 ms.

0 = 1-pole operation.

2-pole, identical to DO- (Value: 0 or 1).

2-pole, identical to DO+ (Value: 0 or 1).

0 = no LSLB (line control)

0 = normal signal voltage level

DO[xx][xx].in pairs Configures line control with channel pairs Pair 1 = channel 1 [01] and channel 2 [02]

Pair 2 = channel 3 [03] and channel 4 [04]
Pair 3 = channel 5 [05] and channel 6 [06]
Pair 4 = channel 7 [07] and channel 8 [08]

See Appendix B

for a complete list of 1753-IB16XOB8 module

variables.

Pulse Test Sources

The two digital pulse test sources (PO) can be used for short-circuit or
line break monitoring of digital inputs. For information on configuring
pulse test sources for line control, see Chapter

ATTENTION

Pulse test sources must not be used as safety-related outputs.

11.

Each output has four terminals for wiring connections.

25 26 27 28 29 30 3231

11112222

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Chapter 8 Wire and Configure the 1753-IB16XOB8 Module

Pulse test sources are connected to these terminals.

Terminal Number Designation Function

25 1 Pulse test source 1
26 1 Pulse test source 1
27 1 Pulse test source 1
28 1 Pulse test source 1
29 2 Pulse test source 2
30 2 Pulse test source 2
31 2 Pulse test source 2
32 2 Pulse test source 2

All PO1 terminals are internally connected and all PO2 terminals are
internally connected. Therefore, all PO1 and all PO2 terminals pulse
together.

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Introduction

Chapter

9

Wire the 1753-IF8XOF4 Analog I/O Module

Topic Page

Safety-related Analog Inputs 95
Standard Analog Outputs 97

The 1753-IF8XOF4 module features 8 safety analog inputs and 4
standard analog outputs.

Safety-related Analog Inputs

These input values are available.

Input Channels Polarity Current or Voltage Range Safety

Accuracy

8 unipolar 0…+10V 0…2000 2%

(1)
(2)

(1) With external 250 Ω shunt.
(2) With external 500 Ω shunt.

0…20 mA / 4…20
mA

0…1000
0…2000

Voltage Measurement

If an open-circuit fault occurs during voltage measurement,
unpredictable input signals are received on the high resistance inputs.
Values resulting from this fluctuating input voltage are not reliable.
Because the module does not feature circuit monitoring, you must
terminate input channels with a 10 kΩ resistor when measuring
voltage. Consider the internal resistance of the source as well.

Current Measurement

To measure current, connect a 500 Ω external shunt in parallel to the
input. Accuracy of the shunt must be included in accuracy calculations
of the input signal. Terminating resistors are not required for current
measurement with the external shunt connected in parallel.

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Chapter 9 Wire the 1753-IF8XOF4 Analog I/O Module

Terminal Connections

Analog cabling should be no more than 300 m (984 ft) in length and
must be shielded, twisted-pair cables for each measurement input.
The shields must be connected at one end.

IMPORTANT

Short-circuit unused input channels to the reference pole by
connecting wire jumpers.

AI

T1 I1 L- T2 I2 L-

41 42 43 44 45 46

Wire Jumpers

AI

I1T1 L-

L- T2 I2 I3T3 L-L- T4 I4 I5T5 L-L- T6 I6 I7T7 L-L- T8 I8

AI AI AI

7891011121 2 3 4 5 6 13 14 15 16 17 18 19 20 21 22 23 24

Wire Jumpers

See the wire size and terminal torques specifications on page 292
Analog inputs (AI) are connected to these terminals.

Terminal Number Designation Function

1 T1 Sensor supply 1
2 I1 Analog input 1
3 L- Reference pole input 1
4 T2 Sensor supply 2
5 I2 Analog input 2
6 L- Reference pole input 2
7 T3 Sensor supply 3
8 I3 Analog input 3
9 L- Reference pole input 3
10 T4 Sensor supply 4
11 I4 Analog input 4
12 L- Reference pole input 4
13 T5 Sensor supply 5
14 I5 Analog input 5
15 L- Reference pole input 5
16 T6 Sensor supply 6
17 I6 Analog input 6
18 L- Reference pole input 6

.

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Terminal Number Designation Function

19 T7 Sensor supply 7
20 I7 Analog input 7
21 L- Reference pole input 7
22 T8 Sensor supply 8
23 I8 Analog input 8
24 L- Reference pole input 8

Standard Analog Outputs

The module has 4 analog outputs, which are not safety-rated outputs.
However, in the event of an internal error, they can be shut down
safely through configuration via the user program.

ATTENTION

To achieve SIL 3, the output values must be read back via safety
analog inputs and evaluated in the RSLogix Guard PLUS! user
program. Appropriate reactions to incorrect output values must
be applied. Otherwise, they may not be used as safety outputs.

When you are not using the analog outputs, use RSLogix Guard PLUS!
programming software to set the 4 analog output (USED) system
signals to FALSE. When set to FALSE, no output signals are transmitted
when the safety switches are opened. Alternatively, you can set the
analog outputs to zero by using the Emergency Off system variable.

These are the analog output resolution options.

Value Range in the Application Output Current

00 mA
2000 20 mA

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Terminal Connections

See the wire size and terminal torques specifications on page 292.
Analog outputs (AO) are connected to these terminals.

Terminal Number Designation Function

25
26 - Reference pole output 1
27
28 - Reference pole output 2
29
30 - Reference pole output 3
31
32 - Reference pole output 4

AO

01 02 03 04

-+-+-+ - +

25 26 27 28 29 30 31 32

+ Analog output 1

O1

+ Analog output 2

O2

+ Analog output 3

O3

+ Analog output 4

O4

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Introduction

Chapter

10

Wire the 1753-OW8 Relay Output Module

Topic Page

Safety-related Relay Outputs 99
Terminal Connections 99
Voltage Supply Considerations 100

Safety-related Relay Outputs

Terminal Connections

The module has 8 isolated relay outputs whose status is indicated via
status indicators.

An output is in a safety state when it is de-energized. When a fault
occurs, all outputs are switched off. Errors in one or more channels
are indicated by the FAULT status indicator. In addition, the system
status can be evaluated in the user program.

If the 1753-OW8 module faults, all 8 outputs are switched off. This is
indicated by the FAULT status indicator.

Each output has 2 safety relays with positively guided contacts and
one MSR type relay. Internal, non-replaceable fuses are used to limit
the switching current of the output contacts to 60% (3.15 A) of the
maximum admissible AC switching current. For DC switching, the
relay contact circuits must be additionally equipped with an external
fuse rated no higher than the maximum admissible DC switching
capacity.

See the wire size and terminal torques specifications on page 294.
Relay outputs are connected to these terminals.

Terminal Number Designation Relay Output

1 DO1 Contact 1, terminal A
2 Contact 1, terminal B
3 DO2 Contact 2, terminal A
4 Contact 2, terminal B
5 DO3 Contact 3, terminal A
6 Contact 3, terminal B

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Chapter 10 Wire the 1753-OW8 Relay Output Module

Terminal Number Designation Relay Output

7 DO4 Contact 4, terminal A
8 Contact 4, terminal B
9 DO5 Contact 5, terminal A
10 Contact 5, terminal B
11 DO6 Contact 6, terminal A
12 Contact 6, terminal B
13 DO7 Contact 7, terminal A
14 Contact 7, terminal B
15 DO8 Contact 8, terminal A
16 Contact 8, terminal B

The output contacts are connected in pairs via terminal connectors
(numbered terminals). The terminal pins on the front plate of the
module have the same numbering sequence to help prevent
miswiring.

Voltage Supply Considerations

Example: Connecting Actuators to the Outputs

DO 1

12 34

For the connection of higher voltages (110/220V AC) besides SELV
and PELV (24V DC), suitable cables must be used with double or
reinforced insulation.

DO 2

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