Rockwell Automation 1794-OB16D User Manual

FLEX I/O Diagnostic Modules

Catalog Numbers 1794-IB16D, 1794-OB16D User Manual

Important User Information

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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

http://literature.rockwellautomation.com

) describes some important differences 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.

available from your local Rockwell Automation sales office or online at

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.

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, such as a drive or motor, to alert people that dangerous voltage may be present.

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

Allen-Bradley, Rockwell Automation, FLEX I/O, RSLogix, RSLinx, RSLogix 5000 and TechConnect are trademarks of Rockwell Automation, Inc.

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

1794 FLEX I/O Diagnostic Digital Modules Overview

About the FLEX I/O Diagnostic Input Module

Table of Contents

Preface

Purpose of This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Important Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

North American Hazardous Location Approval . . . . . . . . . . . . . . . 7

Related Products and Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Chapter 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Network Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1794-IB16D Diagnostic Input Module Compatibility . . . . . . . . . . 14

1794-OB16D Diagnostic Output Module Compatibility . . . . . . . 15

Install Your Digital Input or Output Module. . . . . . . . . . . . . . . . . . . . 16

Chapter 2

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

About the 1794-IB16D Diagnostic Input Module . . . . . . . . . . . . . . . . 19

Diagnostic Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Sensor Power Open and Short Circuit Detection . . . . . . . . . . . . . 22

User Power Supply Reverse Voltage Detection . . . . . . . . . . . . . . . 23

User Power Supply Loss Detection . . . . . . . . . . . . . . . . . . . . . . . . 23

Indicator Status Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Module Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Input Voltage Derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Sensor-Power Derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Unused Sensor Power Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Open Contact Mechanical Switches and Relays. . . . . . . . . . . . . . . 25

Sensor Power Internal Voltage Drop . . . . . . . . . . . . . . . . . . . . . . . 25

Configure Your Diagnostic Input Module . . . . . . . . . . . . . . . . . . . . . . 26

Input Filter Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Chapter 3

About the FLEX I/O Diagnostic Output Module

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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

About the 1794-OB16D Diagnostic Output Module . . . . . . . . . . . . . 27

Wiring Output Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Diagnostic Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Module Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Output Fault & Idle States With Network Communication Failure .

Indicator Status Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Module Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Unused Output Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Configure Your Output Diagnostic Module. . . . . . . . . . . . . . . . . . . . . 32

Table of Contents iv

Configuring Modules for Communication on a Remote I/O Network

Configure FLEX I/O Digital Modules on a DeviceNet Network

Chapter 4

Chapter Objectives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Add a 1756-DHRIO Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Add a 1794 Remote Adapter Module . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Configure Digital Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Create a Block Transfer (Read or Write) Message Instruction . . . . . . 42

Ladder Logic Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Chapter 5

How to Use This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Add the Scanner to the I/O Configuration of the Controller Using

RSLogix 5000 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

If You Need to Conserve EtherNet/IP or ControlNet Network

Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Add the Scanner to the I/O Configuration Folder . . . . . . . . . . . . 50

Define the Properties of the Scanner . . . . . . . . . . . . . . . . . . . . . . . 51

Determine the Address of DeviceNet Data . . . . . . . . . . . . . . . . . . . . . 52

Tally Memory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

If You Configure the Adapter Offline . . . . . . . . . . . . . . . . . . . . . . . . . 55

Set the Address of the Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Configure Your Adapter and Digital Modules on a ControlNet Network

Configure your Digital Module on an EtherNet/IP Network

Chapter 6

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Set Up the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Setting a Requested Packet Interval (RPI) . . . . . . . . . . . . . . . . . . . . . . 58

Select a Communication Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Direct or rack-optimized connection . . . . . . . . . . . . . . . . . . . . . . . 61

Ownership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Add Local and Remote ControlNet Modules. . . . . . . . . . . . . . . . . . . . 65

Add Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Download the Program to the Controller. . . . . . . . . . . . . . . . . . . . . . . 68

Configure the 1794-ACN15 Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Schedule I/O Module Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Access Module Data via the 1794-ACN15 Adapter. . . . . . . . . . . . . . . 75

Slot Status Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Change Configuration Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Chapter 7

How to Use This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Set Up the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Select a Requested Packet Interval (RPI) . . . . . . . . . . . . . . . . . . . . . . . 82

Select a Communication Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Choose Direct or Rack-optimized Connection . . . . . . . . . . . . . . . 84

Ownership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Select a Remote Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Interpret the Indicators

Table of Contents v

Add Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Add a Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Download the Program to the Controller. . . . . . . . . . . . . . . . . . . . . . . 89

Access Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

General Information About IP Addresses . . . . . . . . . . . . . . . . . . . . . . 93

Determining Required Network Parameters . . . . . . . . . . . . . . . . . 93

Assigning Network Parameters via the BOOTP/DHCP Utility. . . . . 94

Using RSLinx software to set the IP address . . . . . . . . . . . . . . . . . 98

Using RSLogix 5000 software to set the IP address . . . . . . . . . . . 99

Using DHCP software to set the IP address . . . . . . . . . . . . . . . . 100

Duplicate IP Address Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Duplicate detection scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

IP Address Swapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Appendix A

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

About the Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

1794-IB16D Diagnostic Functional Details . . . . . . . . . . . . . . . . . . . . 104

Diagnostic Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Diagnostic Functions for the 1794-IB16D. . . . . . . . . . . . . . . . . . 105

1794-OB16D Diagnostic Functional Details . . . . . . . . . . . . . . . . . . . 107

Diagnostic Functions for the 1794-OB16D. . . . . . . . . . . . . . . . . 108

Simplified Schematics of FLEX I/O Digital Modules

Appendix B

Find Your Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

1794-IA8 120V AC 8 Input Module. . . . . . . . . . . . . . . . . . . . . . . 110

1794-IA8I 120V AC 8 Input Module . . . . . . . . . . . . . . . . . . . . . . 110

1794-IA16 120V AC 16 Input Module. . . . . . . . . . . . . . . . . . . . . 111

1794-OA8 120V AC 8 Output Module . . . . . . . . . . . . . . . . . . . . 111

1794-OA8I 120V AC 8 Output Module . . . . . . . . . . . . . . . . . . . 112

1794-OA16 120V AC 16 Output Module. . . . . . . . . . . . . . . . . . 112

1794-IM 8 220V AC 8 Input Module . . . . . . . . . . . . . . . . . . . . . . 113

1794-OM8 220V AC 8 Output Module . . . . . . . . . . . . . . . . . . . . 113

1794-IB8 24V DC 8 Input Module. . . . . . . . . . . . . . . . . . . . . . . . 114

1794-IB16 24V DC 16 Input Module. . . . . . . . . . . . . . . . . . . . . . 114

1794-IB16D 24V DC 16 Diagnostic Input Module. . . . . . . . . . . 115

1794-IB32 24V DC 32 Input Module. . . . . . . . . . . . . . . . . . . . . . 116

1794-IB10XOB6 24V DC 8 10 Input/6 2A Output Module . . . 117

1794-IB16XOB16P 24V DC 16 Input/16 Output Module . . . . 118

1794-IV16 24V DC 16 Source Input Module . . . . . . . . . . . . . . . 119

1794-OB8 24V DC 8 Output Module . . . . . . . . . . . . . . . . . . . . . 119

1794-OB8EP 24V DC Electronically Protected 8 Output Module .

120

1794-OB16 24V DC 16 Output Module . . . . . . . . . . . . . . . . . . . 120

1794-OB16D 24V DC 16 Diagnostic Output Module . . . . . . . . 121

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Table of Contents vi

Index

1794-OB16P 24V DC 16 Output Module . . . . . . . . . . . . . . . . . . 121

1794-OB32P 24V DC 32 Output Module . . . . . . . . . . . . . . . . . . 122

1794-OV16 24V DC 16 Sink Output Module . . . . . . . . . . . . . . . 123

1794-OV16P 24V DC 16 Sink Output Module. . . . . . . . . . . . . . 123

1794-IC 48V DC 16 Input Module. . . . . . . . . . . . . . . . . . . . . . . . 124

1794-OC 48V DC 16 Output Module . . . . . . . . . . . . . . . . . . . . . 124

1794-OW8 Relay Output Module. . . . . . . . . . . . . . . . . . . . . . . . . 124

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Preface

ATTENTION

Purpose of This Manual

Important Warnings and Cautions

This manual provides information on installation, setting, and reading your diagnostics on the 1794-IB16D and the 1794-OB16D Diagnostic modules.

For information on See Chapter

1794 Diagnostic Modules 1 Specific Diagnostic Module 2 or 3 Using Diagnostic Modules in a Remote I/O System 4 Using Diagnostic Modules in a DeviceNet System 5 Using Diagnostic Modules in a ControlNet System 6 Using Diagnostic Modules in an EtherNet /IP System 7 Using the Indicators for Troubleshooting Appendix A Simplified Schematics for all 1794 Digital Modules Appendix B

Obey the following warnings and cautions when installing or using these modules.

Environment and Enclosure

This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664-1), at altitudes up to 2000 meters without derating.

This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate precautions, there may be potential difficulties ensuring electromagnetic compatibility in other environments due to conducted as well as radiated disturbance.

This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications.

See NEMA Standards publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosure. Also, see the appropriate sections in this publication, as well as Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1, for additional installation requirements pertaining to this equipment.

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6 Preface

WARNING

ATTENTION

When you insert or remove the module while backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding.

FLEX I/O 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 (such as aluminum or plastic) that can corrode, oxidize, or are poor conductors, can result in improper or intermittent grounding.

Prevent Electrostatic Discharge

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

• Touch a grounded object to discharge potential static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component boards.

• Do not touch circuit components inside the equipment.

• If available, use a static-safe workstation.

During mounting of all devices, be sure that all debris (such as metal chips or wire strands) is kept from falling into the module. Debris that falls into the module could cause damage on power up.

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Preface 7

WARNING

AVERTISSEMENT

North American Hazardous Location Approval

The 1794-IB16D and 1794-OB16D diagnostic modules are North American Hazardous Location approved.

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

Products marked “CL I, DIV 2, GP A, B, C, D” are suitable for use in Class I Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations only. Each product is supplied with markings on the rating nameplate indicating the hazardous location temperature code. When combining products within a system, the most adverse temperature code (lowest “T” number) may be used to help determine the overall temperature code of the system. Combinations of equipment in your system are subject to investigation by the local Authority Having Jurisdiction at the time of installation.

EXPLOSION HAZARD

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

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

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

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

Informations sur l’utilisation de cet équipement en environnements dangereux :

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

RISQUE D’EXPLOSION

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

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

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

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

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8 Preface

Introduction

General Description

In this chapter, you will learn about the diagnostic input module, cat. no. 1794-IB16D, and the diagnostic output module, cat. no. 1794-OB16D.

Topic See Page

General Description 13 Install Your Digital Input or Output Module 16

This chapter contains an overview of the FLEX I/O diagnostic digital modules, the 1794-IB16D input module and 1794-OB16D output module. You can use the FLEX I/O diagnostic modules to help diagnose problems with input and output field devices, I/O wiring and the user power supply. Additionally, these modules can reduce installation start-up time and help minimize time to find and fix failures.

This chapter explains how to use the FLEX I/O diagnostic modules to help detect the following types of faults:

• Open input or output field devices

• Open input or output wiring

• Shorted output field devices

• Shorted input or output wiring

• Reversed polarity of user supply wiring

• Open user supply wiring or failed user supply (using one diagnostic input channel)

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14 1794 FLEX I/O Diagnostic Digital Modules Overview

Network Compatibility

You can use the diagnostic modules with ControlNet, DeviceNet, EtherNet/IP, or remote I/O networks.

Network 1794-IB16D 1794-OB16D

Remote I/O Compatible with 1794-ASB

DeviceNet No limitations or constraints. ControlNet Direct connection only. Direct or rack connections. EtherNet/IP Direct connection only. Direct or rack connections.

Usage Limitations

series E (or higher) and 1794-ASB2 series D (or higher) remote I/O adapters.

Compatible with 1794-ASB series D (or higher) and 1794-ASB2 series C (or higher) remote I/O adapters.

1794-IB16D Diagnostic Input Module Compatibility

The 1794-IB16D diagnostic input module interfaces to sensing devices and detects whether they are on or off. The diagnostic input module converts dc signals from user devices to the appropriate logic level for use in the FLEX I/O system. Typical input devices include these types of switches.

• Proximity switches

• Limit switches

• Photoelectric switches

• Selector switches

•Float switches

• Pushbutton switches

When designing a system using a FLEX I/O diagnostic input module, you must consider:

• the voltage necessary for your application.

• current leakage through the input devices.

• the amount of current consumed by the input devices.

• whether the application requires sinking or sourcing devices.

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1794 FLEX I/O Diagnostic Digital Modules Overview 15

Capabilities of the 1794-IB16D include:

• 61131-2 Type 3 compatible sinking inputs.

• interface with PNP sourcing sensors.

• 10-31.2V dc operating range.

• provides up to 50 mA to power an attached sensor.

• detects for an open wire condition down to 50 μA.

You need a dummy resistor to mask the channel diagnostic function for each unused sensor port. Used sensor ports must have a 50 μA minimum current draw with the input field device in both the on- and off-state.

1794-OB16D Diagnostic Output Module Compatibility

You can use FLEX I/O diagnostic output modules to drive a variety of output devices. Typical output devices include the following.

•Relays

• Solenoids

• Contactors

• Indicators

• Small motor starters

When you design a system using FLEX I/O diagnostic output modules, you must consider:

• The output must supply the necessary surge and continuous current for the output device being used.

• When sizing output loads, check the documentation supplied with the output device for the surge and continuous current needed to operate the device.

Capabilities of the 1794-OB16D diagnostic output module include:

• sourcing style outputs for loads connected to common.

• 10-31.2V dc operating range.

• provides continuous current of 0.5 A maximum (8 A per module),

2.0 mA minimum per output.

• capable of 2 A surge for 50 ms, repeatable every 2 s.

• protection from short circuit and overload.

You need a dummy resistor to mask the channel diagnostic function for each unused output channel.

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16 1794 FLEX I/O Diagnostic Digital Modules Overview

Install Your Digital Input or Output Module

To install a digital diagnostic module, follow these steps:

✓ Installation Step ❑ 1. Mount the terminal base unit

See installation instructions 1794-IN096

❑ 2. Install the module in the terminal base unit

See installation instructions 1794-IN096

❑ 3. Connect the wiring to the terminal base unit

See installation instructions 1794-IN096

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1794 FLEX I/O Diagnostic Digital Modules Overview 17

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Inputs Channels 0-15

Sensor Power Terminals for Channels 0-15

+V1 COM1 +V1 COM1 +V1 COM1 +V1 COM1 +V2 COM2 +V2 COM2 +V2 COM2 +V2 COM2 NC

NC NC

Sensor Common and User Power Common:

Terminals C-36, C-38, C-40, C-42, C-44, C-46, C-48 and C-50.

User power (+) Voltage: Terminals C-43, C-45, C-47 and C-49.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

COM1 and COM2 are connected together in the module.

+V1 Terminals C-35, C-37, C-39, and C-41 are not used

1794-TB32 and 1794-TB32S Terminal Base Wiring for the 1794-IB16D

Wiring for 1794-IB16D (use with 1794-TB32 or 1794-TB32S Terminal Base Units)

Input Input

Term ina l

Sensor Power Term in al

Common

IN 00 A-0 B-17 -V common IN 01 A-1 B-18 IN 02 A-2 B-19 IN 03 A-3 B-20

connected to terminals 36, 38, 40, 42, 44, 46, 48, and 50

IN 04 A-4 B-21

Supply

+V2 connected to terminals 43, 45, 47, and 49 (+V1 terminals 35, 37, 39, and 41 are not used).

IN 05 A-5 B-22 IN 06 A-6 B-23 IN 07 A-7 B-24 IN 08 A-8 B-25 IN 09 A-9 B-26 IN 10 A-10 B-27 IN 11 A-11 B-28 IN 12 A-12 B-29 IN 13 A-13 B-30 IN 14 A-14 B-31 IN 15 A-15 B-32 +V2 dc

power COM dc

Return

(1)

3-wire devices only. 2-wire devices use input and sensor power terminals; 3-wire

Power terminals 43, 45, 47, and 49 (power terminals are internally connected together in the module)

Common terminals 36, 38, 40, 42, 44, 46, 48, and 50 (common terminals COM 1 and COM 2 are internally connected together in the module)

devices use input, sensor power and common terminals.

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18 1794 FLEX I/O Diagnostic Digital Modules Overview

1794-TB2, -TB3, and -TB3S Terminal Base Wiring for the 1794-OB16D

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Outputs

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

-V

Common

Commons

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

-V

Common

Voltage In +V

Terminals 35 through 50 not available on 1794-TB2

Voltage Out +V

Voltage

-V (Supply Common) = Terminals B-16 through B-33. +V (Supply +Voltage In) = Terminals C-34 through C-51.

(Use B-33 and C-51 for daisy-chaining to next terminal base unit.)

(1794-TB3 shown)

Wiring Connections for the 1794-OB16D (use with 1794-TB2, 1794-TB3 or 1794-TB3S Terminal Base Units)

Outputs Output Terminal Common Terminal

Output 00 A-0 B-17 Output 01 A-1 B-18 Output 02 A-2 B-19 Output 03 A-3 B-20 Output 04 A-4 B-21 Output 05 A-5 B-22 Output 06 A-6 B-23 Output 07 A-7 B-24 Output 08 A-8 B-25 Output 09 A-9 B-26 Output 10 A-10 B-27 Output 11 A-11 B-28 Output 12 A-12 B-29 Output 13 A-13 B-30 Output 14 A-14 B-31 Output 15 A-15 B-32 +V dc C-34 and C-51 (1794-TB2) (Power Terminals are

internally connected in the terminal base unit. C-34…C-51 (1794-TB3, 1794-TB3S) (Power terminals are internally connected in the terminal base unit.

Common B-16…B-33 (Common terminals are internally

connected in the terminal base unit.

About the FLEX I/O Diagnostic Input Module

Introduction

About the 1794-IB16D Diagnostic Input Module

In this chapter, you will learn about the diagnostic input module, cat. no. 1794-IB16D.

For Information About See Page

About the 1794-IB16D Diagnostic Input Module 19 Diagnostic Fault Detection 21 Indicator Status Information 2 Module Limitations 24 Configure Your Diagnostic Input Module 26

The 1794-IB16D diagnostic input module provides 16 points of 24V dc sinking inputs with open-wire, short-circuit, and user supply reverse polarity diagnostic features. Each input signal has an associated sensor power connection. The module monitors current and voltage at each input channel sensor power terminal.

The module detects:

• an open fault if the sensor-power current drops.

• a short fault if the sensor-power voltage goes low.

• a reverse-polarity fault if reverse voltage is applied to the user terminals.

19 Publication 1794-UM061A-EN-P - July 2006

20 About the FLEX I/O Diagnostic Input Module

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

COM1NC

Sensor Common and User Power Common:

Input Channels 0-15

Sensor Power Terminals for Channels 0-15

+V1 COM1 +V1 COM1 +V1 COM1

+V1

+V2 COM2 +V2 COM2+V2 COM2 +V2 COM2 NC

Terminals C-36, C-38, C-40, C-42, C-44, C-46, C-48 and C-50.

User power (+) Voltage: Terminals C-43, C-45, C-47 and C-49

+V1 Terminals C-35, C-37, C-39 and C-41 are not used

COM1 and COM2 are connected together in the module.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Wiring Input Sensors

You must use a 1794-TB32 or 1794-TB32S terminal base unit with the 1794-IB16D diagnostic input module. See installation instructions ldkg df;l 1794-IN096

for complete information.

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Two-wire input devices connect to the input and sensor power terminals; 3-wire devices use input, sensor power and common terminals. You can wire 2-wire and 3-wire sensors to the FLEX I/O 1794-TB32 or 1794-TB32S terminal base units.

Unused sensor-power ports or open-contact input devices must use a dummy resistor to mask the diagnostic function. If these external resistors are not used, the module’s fault indicator will light, along with the module’s error bits, thus rendering fault detection of the remaining channels useless. The recommended value of this dummy resistor is 20 kΩ (+ larger). Connect the resistor between sensor power and input signal or

10%), 1/8 Watt (or

between sensor power and common.

About the FLEX I/O Diagnostic Input Module 21

User Power

Reverse Voltage Monitor

PTC

Shorted Input Monitor

Open Wire Monitor

Input Circuit Indicator

Input

Sensor Power

Reverse

Short

Open

Input

Flexbus Interface

V+

Fault Indicator

Diagnostic Fault Detection

The module monitors current and voltage at each input channel sensor power terminal, and monitors the user supply for reverse user supply voltage. The figure below shows the location of these fault monitors in the 1794-IB16D diagnostic input module.

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22 About the FLEX I/O Diagnostic Input Module

Sensor Power Open and Short Circuit Detection

The sensor-power open-wire current monitor detects a fault condition if the sensor-power current drops below 50 μA. Sensor-power shorts are protected by the positive temperature coefficient (PTC) resistor in series with each sensor power output (16 total). For overcurrents or shorts, the PTC resistor heats up, the resistance increases and the sensor power output opens, similar to a fuse opening. This shorted condition is monitored by the sensor power voltage monitor. It detects a short if the sensor power voltage disappears. When the short is removed, the PTC resistor cools down and the previously shorted sensor-power port, sensor power is automatically restored and normal operation continues.

The module’s embedded monitors detect open and short conditions.

Publication 1794-UM061A-EN-P - July 2006

When a fault is detected:

• the corresponding channel’s red indicator lights.

• the module’s red fault indicator lights.

• the module’s open, short or reverse error bit is set.

• the module error bit is set.

The input circuit is a conventional sinking style with an input voltage dropping resistor. The yellow input indicator is in series with the input signal (field-side indication). FLEX I/O system-side logic voltages are isolated from the user power supply and input channels by optocouplers. This provides protection against field side voltages and transients.

About the FLEX I/O Diagnostic Input Module 23

(1794-IB16D shown)

User Power Supply Reverse Voltage Detection

If the external user power supply is miswired (incorrect polarity), the module is protected and reports a reverse user voltage fault. The reverse voltage condition must be at least -10V to detect a fault. The module’s Fault indicator turns red and the reverse fault bit is set. The module error bit is also set. When the correct user power supply polarity is applied, the module Fault indicator is off and the reverse fault bit is not set.

User Power Supply Loss Detection

The module does not check for presence of the external user power supply. Detection can be accomplished by wiring an input channel to the user supply. Any 24V dc input can be used. You can wire a 1794-IB16D diagnostic input module or 1794-IB16 input module to monitor the user supply as shown below:

Indicator Status Information

The 1794-IB16D diagnostic input module has indicators that let you check the module health and operational status. The following status can be checked with the indicators.

• Channel I/O Status - This indicator displays the ON/OFF state of the input channel, as well as channel wiring fault conditions:

– Off indicates the input channel is off with no faults.

– Yellow indicates the input channel is on with no faults.

– Red indicates either a channel sensor power open or short condition.

• Module Fault Status- This indictor turns red for any individual input channel open, short or module reverse power conditions. With no fault, the module fault status indicator turns off.

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24 About the FLEX I/O Diagnostic Input Module

Ambient Temperature

(0°C)

Input

Voltage

(V)

Sensor Power

Current

(mA)

Ambient Temperature (° C)

Module Limitations

Input Voltage Derating

You must derate the input voltage applied to each input channel, based on operating ambient temperature, to keep module power dissipation within an acceptable level.

31.2

26.4

25 20 15 10

5 0

20 30 40 50 55

Sensor-Power Derating

You must derate the allowable current from each channel sensor-power port based on operating ambient temperature to keep module power dissipation to an acceptable level.

Publication 1794-UM061A-EN-P - July 2006

About the FLEX I/O Diagnostic Input Module 25

User Power +

PTC Resistor

Off-Wire Current Monitor Fault if: 1 < 50 μA

Sensor Power

Sensor

Input

Vsensor = (Ext Pwr) - 2.2V

Overcurrent causes PTC to open

Voltage Drop = 2.2V maximum

24V dc External User Power Supply

User Power

Unused Sensor Power Ports

You must connect dummy resistors to unused Sensor Power ports to mask the diagnostic function. If external resistors are not used, the module's sensing circuitry will not detect the intended voltage or current and not report that a fault exists. The module’s fault and open-channel indicators light, and the module’s open and module error bits are set, thus rendering fault detection of the remaining channels useless. The recommended value of this dummy resistor is 20 KΩ (+

10%), 1/8 W (or larger).

Open Contact Mechanical Switches and Relays

The module's sensing circuitry must detect a minimum current level to conclude that an open circuit does not exist. Electronic input field devices typically have sufficient leakage current to satisfy the minimum requirement. However, hard contacts have no leakage current, so you must add dummy resistors in parallel to the hard contacts to supply the minimum current needed for the module to sense that an open circuit does not exist. The recommended resistor value is 20 kΩ (+ the dummy resistor at the field device also allows for monitoring of field wiring conditions. Connect the resistor between sensor power and input signal, or between sensor power and common.

10%), 1/8 W (or larger). Placement of

Sensor Power Internal Voltage Drop

The modules sensor power circuit exhibits an internal voltage drop. This voltage drop can be as large as 2.2V for all operating conditions. You must subtract 2.2V from the value of your external user power supply to determine the voltage applied to power attached sensors. Make sure this voltage meets sensor requirements. Consult the data sheet for your sensor to determine what voltage is necessary.

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26 About the FLEX I/O Diagnostic Input Module

Configure Your Diagnostic Input Module

Dec. 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Oct. 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Read 1 I 15 I 14 I 13 I 12 I 11 I 10 I 9 I 8 I 7 I 6 I 5 I 4 I 3 I 2 I 1 I 0 Read 2 Not used Read Diagnostics Status Write 1 Not used Input Filter FT 0-15 Not used Where: I = Input

FT = Input filter time Diagnostic status; Bit 00 = module error; Bit 01 = external power reverse polarity error; Bit 02 = sensor power short error; Bit 03 = sensor power open wire error

The configuration and input filter selection table are shown below.

Data Table & Input Filter Time Selection

The inputs are read in Word 1. Bit 00 is the first input and decimal bit 15 is the last input.

Diagnostic status is read from Word 2:

Bit 00: Module Error Bit Bit 01: External Power Reverse Polarity Error Bit Bit 02: Sensor Power Short Error Bit Bit 03: Sensor Power Open Wire Error Bit

Input Filter Times

Input filter times are configurable on a module basis. Both off-to-on and on-to-off times are set by write Word 3. The default filter time is 0.25 ms.

Bits Description Filter Time 10 09 08 Filter time for inputs 0

thru 15

0 0 0 Filter time 0 (default) 0.25 ms 0 0 1 Filter time 1 0.5 ms 0 1 0 Filter time 2 1 ms 0 1 1 Filter time 3 2 ms 1 0 0 Filter time 4 4 ms 1 0 1 Filter time 5 8 ms 1 1 0 Filter time 6 16 ms 1 1 1 Filter time 7 32 ms

Off-to-On/ On-to-Off

Publication 1794-UM061A-EN-P - July 2006

Chapter

About the FLEX I/O Diagnostic Output Module

Introduction

About the 1794-OB16D Diagnostic Output Module

In this chapter, you will learn about the diagnostic output module, cat. no. 1794-OB16D.

For Information About See Page

About the 1794-OB16D Diagnostic Output Module 27 Diagnostic Fault Detection 29 Module Protection Functions 30 Module Limitations 32 Configure Your Output Diagnostic Module 32

The 1794-OB16D diagnostic output module provides sixteen 24V dc sourcing outputs with open-wire, short-circuit, and user supply reverse polarity diagnostic features. The module monitors current and voltage at each output channel.

The module detects:

• an open fault if no current is present at the output terminal.

• a short fault if no voltage is present at the output terminal.

• a reverse-polarity fault if reverse voltage is applied.

When an open or short fault is detected:

• the corresponding channels red indicator is illuminated.

• the module’s red fault indicator is illuminated.

• the module’s open or short error bit is set.

• the module error bit is set.

When a user supply reverse-polarity fault is detected:

• the modules red fault indicator is turned on,

• and the reverse error bit is set.

• the module error bit is set.

27 Publication 1794-UM061A-EN-P - July 2006

28 About the FLEX I/O Diagnostic Output Module

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Output Channel 0-15

Common

(1794-TB3 shown)

-V

Voltage In +V

Voltage Out +V

Voltage (24V dc)

Terminals 35 thru 50 not available on 1794-TB2

Common

-V

Common

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

FLEX TB2/3/3S Terminal Base

A0-A15

B17-B32

C34

B16

Output

Common

V+

V-

Output Device

24V dc External User Power Supply

Wiring Output Loads

You can use the 1794-OB16D diagnostic module with the 1794-TB2, 1794-TB3, or 1794-TB3S terminal base units.

User power can be wired to the (+) voltage and common terminals directly, or power can be daisychained from the FLEX I/O terminal base units on the DIN rail. Output channels are not isolated from one another. All 16 channels share a common return (group isolation from FLEX I/O system-side logic voltages).

Publication 1794-UM061A-EN-P - July 2006

+ 102 hidden pages

Rockwell Automation 1794-OB16D User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Preface

Purpose of This Manual

Important Warnings and Cautions

North American Hazardous Location Approval

Related Products and Documentation

Introduction

General Description

Network Compatibility

1794-IB16D Diagnostic Input Module Compatibility

1794-OB16D Diagnostic Output Module Compatibility

Install Your Digital Input or Output Module

Introduction

About the 1794-IB16D Diagnostic Input Module

Wiring Input Sensors

Diagnostic Fault Detection

Sensor Power Open and Short Circuit Detection

User Power Supply Reverse Voltage Detection

User Power Supply Loss Detection

Indicator Status Information

Module Limitations

Input Voltage Derating

Sensor-Power Derating

Unused Sensor Power Ports

Open Contact Mechanical Switches and Relays

Sensor Power Internal Voltage Drop

Configure Your Diagnostic Input Module

Input Filter Times

Introduction

About the 1794-OB16D Diagnostic Output Module

Wiring Output Loads