Rockwell Automation 1734-IE4S User Manual

User Manual
POINT Guard I/O Safety Modules
Catalog Numbers 1734-IB8S, 1734-OB8S, 1734-IE4S

Important User Information

IMPORTANT
Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
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.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Allen-Bradley, GuardLogix, Guardmaster, POINT Guard I/O, Rockwell Automation, Rockwell Software, RSNetWorx, SmartGuard, and Studio 5000 are trademarks of Ro ckwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.

Summary of Changes

This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.

New and Updated Information

This table contains the changes made to this revision.
Top ic Pa ge
Added information on accessing Release Notes. 12 Added information on single -channel operation to the list of 1734-IB8S module features 18 Updated Single-channel Mode Normal Operation and Fault Detection figure. 26 Updated Dual-channel, Equivalent Normal Operation and Fault Detection figure. 28 Updated Complementary, Normal Operation and Fault Detection figure. 29 Updated Dual-channel Setting figure. 39 Added information on placing Series B modules. 48 Updated European Hazardous Location Approval information. 52 Added guidance for using the 1734-IE4S module's sensor power supply. 58 Correc ted the Cla ss ID in Ta bl e 15 Updated Appendix C: Specifications 161 Added specification for Sensor Supply Undercurrent Fault. 166 Added Safety Data for Series B modules to Appendix C. 173
Safety Analog Input Module (1734-IE4S) 158
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 3
Summary of Changes
Notes:
4 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
POINT Guard I/O Overview

Table of Contents

Preface
Studio 5000 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Access Product Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Chapter 1
Understand Suitability for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Installing and Replacing Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
POINT Guard I/O Modules in CIP Safety Systems. . . . . . . . . . . . . . . . . 17
1734-IB8S Digital Input Module Features. . . . . . . . . . . . . . . . . . . . . . 18
1734-OB8S Safety Digital Output Module Features. . . . . . . . . . . . . 18
1734-IE4S Safety Analog Input Module Features . . . . . . . . . . . . . . . 19
Programming Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CIP Safety Architectures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Safety Application Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Safety Inputs, Safety Outputs, and Safety Data
Chapter 2
Safe States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
POINT Guard Digital I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
POINT Guard I/O Analog Input Module. . . . . . . . . . . . . . . . . . . . . . 24
Safety Inputs (1734-IB8S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Using a Test Output with a Safety Input . . . . . . . . . . . . . . . . . . . . . . . 24
Single-channel Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Dual-channel Mode and Discrepancy Time. . . . . . . . . . . . . . . . . . . . . 27
Dual-channel, Equivalent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Dual-channels, Complementary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Safety Input Fault Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Input Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Safety Analog Inputs (1734-IE4S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Scaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Digital Input Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Sensor Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Channel Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Process Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Using a Single-channel Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Dual-channel Equivalent Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Tachometer Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Safety Outputs (1734-OB8S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Safety Output with Test Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Dual-channel Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Safety Output Fault Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Muting Lamp Operation (1734-IB8S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 5
Table of Contents
Guidelines for Placing Power Supplies and Modules in a System
Install the Module
I/O Status Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Digital I/O Status Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Analog I/O Status Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Chapter 3
Choosing a Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Power Supply Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Example 1: Isolating Field Power Segments . . . . . . . . . . . . . . . . . . . . . 47
Example 2: POINT Guard I/O Used with AC I/O Modules . . . . . 47
Placing Series A Digital and Analog Modules . . . . . . . . . . . . . . . . . . . . . . . 48
Placing Series B Digital Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Chapter 4
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
European Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . . . . 52
North American Hazardous Location Approval. . . . . . . . . . . . . . . . . 53
Environment and Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Preventing Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Mount the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Install the Mounting Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Connect the Module to the Mounting Base . . . . . . . . . . . . . . . . . . . . . 55
Connect the Removable Terminal Block. . . . . . . . . . . . . . . . . . . . . . . . 56
Remove a Mounting Base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Wire Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Terminal Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Connection Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Wiring Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Emergency Stop Dual-channel Devices . . . . . . . . . . . . . . . . . . . . . . . . . 62
Single-channel Safety Contactor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Dual-channel Safety Contactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Safety Analog Input Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Chapter 5
Configure the Module in a GuardLogix Controller System
6 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Setting Up the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Add and Configure the Ethernet Bridge Module . . . . . . . . . . . . . . . . . . . . 74
Add and Configure the 1734 Ethernet Adapter . . . . . . . . . . . . . . . . . . . . . 75
Add and Configure Safety Digital Input Modules . . . . . . . . . . . . . . . . . . . 77
Add the Safety Digital Input Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Configure the Safety Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Configure the Test Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Add and Configure Safety Digital Output Modules . . . . . . . . . . . . . . . . . 86
Add the Safety Digital Output Module . . . . . . . . . . . . . . . . . . . . . . . . . 86
Configure the Safety Digital Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Add and Configure Safety Analog Input Modules . . . . . . . . . . . . . . . . . . . 91
Add the Safety Analog Input Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Configure the Safety Analog Input Channel Operation . . . . . . . . . . 94
Configure the Safety Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Table of Contents
Configure Safety Analog Input Alarms (optional) . . . . . . . . . . . . . . . 96
Configure Tachometer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Values and States of Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Configure Safety Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Configuration Ownership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Saving and Downloading the Module Configuration. . . . . . . . . . . . . . . 104
Using ControlFLASH Software to Update POINT Guard I/O
Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Chapter 6
Configure the Module for a SmartGuard Controller
Configuring Safety Connections between a GuardLogix Controller and POINT Guard I/O Modules on a DeviceNet Network
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Set the Node Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Auto-addressing with a 1734-PDN Adapter . . . . . . . . . . . . . . . . . . . . . . . 108
Set Up Your DeviceNet Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Configure the POINT Guard I/O Modules . . . . . . . . . . . . . . . . . . . . . . . 110
Configure Digital Safety Inputs and Test Outputs . . . . . . . . . . . . . 110
Configure Digital Safety Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Configure Safety Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Configure the SmartGuard Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Set Up the Input and Output Connections . . . . . . . . . . . . . . . . . . . . 119
Complete the Set Up of the SmartGuard Controller . . . . . . . . . . . 123
Save and Download Module Configuration . . . . . . . . . . . . . . . . . . . . . . . 124
Chapter 7
Configure the Module in RSNetWorx for DeviceNet Software . . . . . 125
Add the POINT Guard I/O Module to the Controller Project . . . . . 126
Complete the Safety Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Download the DeviceNet Network Configuration. . . . . . . . . . . . . . . . . 131
Verify Your DeviceNet Safety Configuration . . . . . . . . . . . . . . . . . . . . . . 131
Determine If Devices Can Be Verified. . . . . . . . . . . . . . . . . . . . . . . . . 132
Select Devices to Verify . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Review the Safety Device Verification Reports . . . . . . . . . . . . . . . . . 134
Lock Safety Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Replacing POINT Guard I/O Modules
Chapter 8
The Safety Network Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Manually Setting the Safety Network Number. . . . . . . . . . . . . . . . . . . . . 138
Resetting a Module to Out-of-box Condition . . . . . . . . . . . . . . . . . . . . . 139
By Using the Logix Designer Application. . . . . . . . . . . . . . . . . . . . . . 139
By Using RSNetWorx for DeviceNet Software . . . . . . . . . . . . . . . . 140
Replacing a Module in a GuardLogix System on an EtherNet/IP
Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Replacement with ‘Configure Only When No Safety Signature
Exists’ Enabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Replacement with ‘Configure Always’ Enabled. . . . . . . . . . . . . . . . . 145
Replacing a Module When Using a SmartGuard or GuardLogix
Controller on a DeviceNet Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 7
Table of Contents
Appendix A
Indicators
Get I/O Diagnostic Status from Modules in Logix Systems
Specifications
Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Network Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Configuration Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
1734-IE4S Sensor Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
1734-IE4S Safety Analog Input Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
1734-IB8S Safety Input Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
1734-OB8S Safety Output Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Appendix B
Message Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Configure the Message Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Class, Instance, and Attribute Data for I/O Modules . . . . . . . . . . . . . . . 157
Appendix C
Technical Specifications for Series A Modules . . . . . . . . . . . . . . . . . . . . . 161
Safety Digital Input Module Specifications. . . . . . . . . . . . . . . . . . . . . 161
Safety Digital Output Module Specifications. . . . . . . . . . . . . . . . . . . 163
Safety Analog Input Module Specifications . . . . . . . . . . . . . . . . . . . . 164
Technical Specifications for Series B Modules. . . . . . . . . . . . . . . . . . . . . . 173
Safety Digital Input Module Specifications. . . . . . . . . . . . . . . . . . . . . 173
Safety Digital Output Module Specifications. . . . . . . . . . . . . . . . . . . 176
Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Legislations and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Safety Data
Configuration Parameters
I/O Assemblies
Appendix D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Series A Safety Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Series B Safety Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Appendix E
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Appendix F
Input Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Output Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Analog Input Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Configuration Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Using Data from Modules Configured via the Generic Profile. . . . . . . 200
8 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Appendix G
Table of Contents
History of Changes
Index
1734-UM013I-EN-P, May 2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
1734-UM013H-EN-P, August 2012. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
1734-UM013G-EN-P, August 2012. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
1734-UM013F-EN-P, June 2012. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
1734-UM013E-EN-P, March 2012. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
1734-UM013D-EN-P, September 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . 202
1734-UM013C-EN-P, August 2010. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
1734-UM013B-EN-P, June 2009. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
1734-UM013A-EN-P, February 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 9
Table of Contents
10 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014

Preface

Thoroughly read and understand this manual before installing and operating a system using POINT Guard I/O™ modules.
Always observe the following guidelines when using a module, noting that in this manual we use safety administrator to mean a person qualified, authorized, and responsible to secure safety in the design, installation, operation, maintenance, and disposal of the ‘machine’.
Keep this manual in a safe place where personnel can refer to it when necessary.
Use the module properly according to the installation environment, performance ratings, and functions of the machine.

Studio 5000 Environment

See Understand Suitability for Use on page 15
page 17.
Product specifications and accessories can change at any time. Consult with your Rockwell Automation representative to confirm specifications of purchased product. Dimensions and weights are nominal and are not for manufacturing purposes, even when tolerances are shown.
Consult your Rockwell Automation representative if you have any questions or comments. Also refer to the related documentation, listed in the page 13 necessary.
The Studio 5000® Automation Engineering & Design Environment combines engineering and design elements into a common environment. The first element is the Studio 5000 Logix Designer™ application. The Logix Designer application is the rebranding of RSLogix™ 5000 software and will continue to be the product to program Logix5000™ controllers for discrete, process, batch, motion, safety, and drive-based solutions.
and Safety Precautions on
, as
The Studio 5000 environment is the foundation for the future of Rockwell Automation® engineering design tools and capabilities. The Studio 5000 environment is the one place for design engineers to develop all of the elements of their control system.
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 11
Preface

Terminology

Ter m Me ans
Connection Logical communication channel for communication between nodes. Connections are maintained and controlled between masters and slaves.
EDS Electronic data sheet, a template used in RSNetWorx software to display the configuration parameters, I/O data profile, and connection-type support for a
given I/O module. RSNetWorx software uses these simple text files to identify products and commission them on a network.
ODVA Open DeviceNet Vendor Association, a nonprofit association of vendors established for the promotion of CIP networks.
PFD Probability of failure on demand, the average probability of a system to fail to perform its design function on demand.
PFH Probability of failure per hour, the probability of a system to have a dangerous failure occur per hour.
Proof test Periodic test performed to detect failures in a safety-related system so that, if necessary, the system can be restored to an as-new condition or as close as
practical to this condition.
SNN Safety network number, which uniquely identifies a network across all networks in the safety system. You are responsible for assigning a unique number
for each safety network or safety sub-net within a system.
Standard Devices or portions of devices that do not participate in the safety function.

Access Product Release Notes

Refer to this table for the meaning of common terms.
Product release notes are available online within the Product Compatibility and Download Center.
1. From the Quick Links list on http://www.ab.com
, choose Product
Compatibility and Download Center.
2. From the Compatibility Scenarios tab or the Get Downloads tab, search for and choose your product.
3. Click the download icon to access product release notes.
12 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Preface

Additional Resources

These documents contain additional information concerning related products from Rockwell Automation.
Resource Description
POINT I/O Selection Guide, publication 1734-SG001 Provides selection information for POINT I/O™ modules. Additional publication references
GuardLogix 5570 Controllers User Manual, publication 1756-UM022 Provides information on how to install, configure, program, and use GuardLogix 5570
GuardLogix 5570 Controller Systems Safety Reference Manual, publication 1756-RM099
GuardLogix Controller Systems Safety Reference Manual, publication 1756-RM093 Provides information on safety system requirements and describes the GuardLogix®
GuardLogix Controllers User Manual, publication 1756-UM020 Provides information on how to install, configure, program, and use GuardLogix
GuardLogix Safety Application Instructions Safety Reference Manual, publication 1756-RM095
SmartGuard 600 Controllers Safety Reference Manual, publication 1752-RM001 Describes SmartGuard 600-specific safety requirements and controller features.
SmartGuard 600 Controllers User Manual, publication1752-UM001 Describes how to configure, operate, and troubleshoot the controller.
Field Potential Distributor Installation Instructions, publication 1734-IN059
POINT I/O 24V DC Expansion Power Supply Installation Instructions, publication 1734-IN058
POINT I/O 120/240V AC Expansion Power Supply Installation Instructions, publication 1734-IN017
POINT I/O Wiring Base Assembly Installation Instructions, publication 1734-IN511
POINT I/O One-piece Wiring Base Assembly Installation Instructions, publication 1734-IN028
DeviceNet Modules in Logix5000 Control Systems User Manual, publication DNET-UM004 Provides information on how to connect the controller to the network.
ODVA Media Planning and Installation Guide, http://www.odva.org
Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation industrial system.
Product Certifications website, http://www.ab.com Provides declarations of conformity, certificates, and other certification details.
Describes the required media components and how to plan for and install these required
are listed as well.
controllers in Studio 5000 Logix Designer projects.
Provides information on safety application requirements for GuardLogix 5570 controllers in Studio 5000™ Logix Designer projects.
controller system.
controllers in RSLogix 5000 projects.
Provides reference information describing the GuardLogix Safety Application Instruction Set.
Provides installation information on 1734-FPD distributors.
Provides installation information on 1734-EP24DC power supplies.
Provides installation information on 1734-EPAC power supplies.
Provides installation information on 1734-TB and 1734-TBS assemblies.
Provides installation information on 1734-TOP, 1734-TOPS, 1734-TOP3, and 1734-TOP3S assemblies.
components.
You can view or download publications at
http://www.rockwellautomation.com/literature/
. To order paper copies of technical documentation, contact your local Allen-Bradley® distributor or Rockwell Automation sales representative.
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 13
Preface
Notes:
14 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Chapter 1
POINT Guard I/O Overview
Top ic Pag e
Understand Suitability for Use 15
Safety Precautions 17
POINT Guard I/O Modules in CIP Safety Systems 17
Safety Application Requirements 21
Use the POINT Guard I/O safety modules in the POINT I/O platform to distribute safety I/O on a safety-control network that meets the requirements up to and including SIL CL3, and PLe, Cat. 4 as defined in IEC 61508, IEC 61511, IEC 62061, and ISO 13849-1. POINT Guard I/O modules may be used with 1756 GuardLogix, 1768 Compact GuardLogix, or SmartGuard 600 controllers.

Understand Suitability for Use

You can configure the modules for use on DeviceNet networks by using the network configuration tool, RSNetWorx™ for DeviceNet software. For EtherNet networks, use the GuardLogix programming tool, the Logix Designer application.
Rockwell Automation is not responsible for conformity with any standards, codes, or regulations that apply to the combination of the products in your application or use of the product. See Legislations and Standards more information.
Take all necessary steps to determine the suitability of the products for the systems, machine, and equipment with which it is used.
Know and observe all prohibitions of use applicable to these products.
Use this equipment within its specified ratings.
Never use these products for an application involving serious risk to life or property without making sure that the system as a whole was designed to address the risks and that the Rockwell Automation products are properly rated and installed for the intended use within the overall equipment or system.
on page 179 for
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 15
Chapter 1 POINT Guard I/O Overview
TIP
Verify that the POINT Guard I/O firmware revision is correct prior to commissioning the safety system. Firmware information for safety I/O modules is available at
http://www.rockwellautomation.com/products/certification/safety
.
Field power must be applied to the 1734-IE4S module when updating firmware.
Verify that a safety administrator conducts a risk assessment on the machine and determines module suitability before installation.
ATTENTION: Personnel responsible for the application of safety-related programmable electronic systems (PES) shall be aware of the safety requirements in the application of the system and shall be trained in using the system.
ATT EN TI ON : Use only appropriate components or devices complying with relevant safety standards corresponding to the required safety category and safety integrity level.
Conformity to requirements of the safety category and safety integrity level must be determined for the entire system.
We recommend you consult a certification body regarding assessment of conformity to the required safety integrity level or safety category.
You are responsible for confirming compliance with the applicable standards for the entire system.
Table 1 - Requirements for Controlling Devices
Device Requirement Allen-Bradley Bulletin Safety Components
Emergency stop switches Use approved devices with direct opening mechanisms complying with IEC/EN 60947-
Door interlocking switches, limit switches
Safety sensors Use approved devices complying with the relevant product standards, regulations, and
Relays with forcibly- guided contacts, contac tors
Other devices Evaluate whether devices used are appropriate to satisfy the requirements of safety
5-1. Use approved devices with direct opening mechanisms complying with IEC/EN 60947-
5-1 and capable of switching microloads of 24V DC, 3 mA.
rules in the country where used. Use approved devices with forcibly-guided contacts complying with EN 50205. For
feedback purposes, use devices with contacts capable of switching micro loads of 24V DC, 3 mA.
category levels.
Bulletin 800F, 800T
Bulletin 440K, 440G, 440H for interlock switch Bulletin 440P, 802T for limit switch
Any Guardmaster product
Bulletin 700S, 100S
-
16 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
POINT Guard I/O Overview Chapter 1

Safety Precautions

Observe these precautions for proper use of POINT Guard I/O modules.
ATTENTION: As serious injury may occur due to loss of required safety function, follow these safety precautions.
Never use test outputs as safety outputs. Test outputs are not safety outputs.
Do not use Ethernet, DeviceNet, or ControlNet standard I/O data or explicit
message data as safety data.
Do not use LED status indicators on the I/O modules for safety operations.
Do not connect loads beyond the rated value to the safety outputs.
Apply properly specified voltages to the module. Applying inappropriate
voltages may cause the module to fail to perform it’s specified function, which could lead to loss of safety functions or damage to the module.
Wire the POINT Guard I/O modules properly following the wiring requirements and guidelines in Wire Modules
on page 58.
Set unique network node addresses before connecting devices to the network.
Perform testing to confirm that device wiring, configuration, and operation is
correct before starting system operation.
Do not disassemble, repair, or modify the module. This may result in loss of safety functions.

Installing and Replacing Modules

POINT Guard I/O Modules in CIP Safety Systems

ATTENTION:
Clear previous configuration data before connecting devices to the network or
connecting input or output power to the device.
Configure the replacement device properly and confirm that it operates correctly.
After installation of the module, a safety administrator must confirm the installation and conduct trial operation and maintenance.
When cleaning modules, do not use the following:
Thinner
Benzene
Acetone
POINT Guard I/O modules are used in the POINT I/O platform and implement CIP Safety protocol extensions over EtherNet/IP and DeviceNet networks to communicate safety messages. POINT Guard I/O modules connect to EtherNet/IP or DeviceNet networks via these network adapters.
Table 2 - Network Adapters
Network System Adapter
EtherNet/IP GuardLogix 1734-AENT (firmware revision 3 or later)
DeviceNet SmartGuard or GuardLogix 1734-PDN
(1)
1734-AENTR
(1) Not compatible with 1734-ADN, 1734-ADNX, 1734-APB, or 1734-ACNR adapters.
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 17
Chapter 1 POINT Guard I/O Overview
Distributed I/O communication for safety I/O data is performed through safety connections supporting CIP Safety over an EtherNet/IP or DeviceNet network. Data processing is performed in the safety controller. The status and fault diagnostics of POINT Guard I/O modules are monitored by a controller.
In addition to I/O state data, the modules include status data for monitoring I/O faults within each circuit.
The configuration information of the modules can be protected by a password.

1734-IB8S Digital Input Module Features

Safety digital inputsSafety devices, such as emergency stop push buttons, gate switches, and
safety light curtains, can be connected.
– Dual-channel mode evaluates consistency between two input signals
(channels), which allows use of the module for safety Category 3 and 4 and in applications rated up to and including Performance Level e/ SIL CL3.
– Single-channel mode evaluates one input signal (channel), which allows
use of the module for safety Category 2 and in applications rated up to and including Performance Level d/SIL CL 2.
– You can configure a discrepancy time to control how long two channels
are allowed to be discrepant before a fault is declared.
– An external wiring short-circuit check is possible when inputs are wired
in combination with test outputs. The module must be wired in combination with test outputs when this function is used.
Independently adjustable on and off delays are available per channel.
Test outputs (digital input modules only)Separate test outputs are provided for short-circuit detection of a safety
input (or inputs).
Power (24V) can be supplied to devices, such as safety sensors.Test outputs can be configured as standard outputs. Specific test outputs can be used for broken-wire detection of a muting
lamp.

1734-OB8S Safety Digital Output Module Features

Solid-state outputs
Dual-channel mode provides redundant control by using two output
signals (channels), which allows use of the module for safety Category 3 and 4, and applications rated up to and including Performance Level e/ SIL CL3.
Safety outputs can be pulse-tested to detect field wiring short circuits to 24V DC.
18 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
POINT Guard I/O Overview Chapter 1

1734-IE4S Safety Analog Input Module Features

Connection of up to four voltage or current sensors.
Sensor power outputs are individually current-limited and monitored.
Measurement of process variables, such as temperature, pressure, or flow
rate.
Seven configurable input ranges (±10V, ±5V, 0…5V, 0…10V, 4…20 mA, 0…20 mA, Tachometer).
Tachometer mode converts 24V DC switching signals into pulses per second.
Single-channel or dual-channel for SIL 3-rated safety devices and applications.
Dual-channel mode evaluates the consistency between two input signals (channels), which allows use of the module in applications rated up to and including SIL CL3/PLe/Cat. 4.
You can configure a discrepancy time to control how long two channels are allowed to be discrepant before a fault is declared.

Programming Requirements

Use the minimum software versions listed here.
Cat. No. Studio 5000 Environment
1734-IB8S, 1734-OB8S
1734-IE4S 21 18
(1) This version or later. (2) If you are using digital POINT Guard I/O modules with the analog POINT Guard I/O module, you need to update the add-on
profiles to version 2.02.004 or later for the modules to be compatible with version 18 or later of RSLogix 5000 software and the Studio 5000 environment. To find add-on profiles, go to http://www.rockwellautomation.com/support
(3) Dual-channel Analog ( DCA) safety application instruction is available in RSLogix 5000 software, version 20 or later and Studio
5000 environment, version 21 and later.
(1)
Versi on
21 17
RSLogix 5000 Software
(1)
Vers ion (EtherNet/IP Network)
(2)
(3)
RSNetWorx for DeviceNet Software Version (DeviceNet Network)
9
10
.
(1)
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 19
Chapter 1 POINT Guard I/O Overview
Safety Communication
GuardLogix Control ler
CompactBlock Guard I/O™
POINT Guard I/O and POINT I/O
Standard Communication
Stratix Switch
GuardLogix Control ler
Guard I/O
POINT Guard I/O and POINT I/O
Safety Communication
Standard Communication
SmartGuard Control ler

CIP Safety Architectures

Use POINT Guard I/O modules in EtherNet/IP or DeviceNet safety architectures. Safety controllers control the safety outputs. Safety or standard PLC controllers can control the standard outputs.
Figure 1 - POINT Guard I/O Modules in EtherNet/IP Safety Architecture
Figure 2 - POINT Guard I/O Modules in DeviceNet Safety Architectures
20 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
POINT Guard I/O Overview Chapter 1

Safety Application Requirements

POINT Guard I/O modules are certified for use in safety applications up to and including Performance Level e (PLe/Cat. 4) and Safety Integrity Level 3 (SIL CL3) in which the de-energized state is the safe state. Safety application requirements include evaluating probability of failure rates (PFD and PFH), system reaction time settings, and functional verification tests that fulfill SIL 3 criteria.
Creating, recording, and verifying the safety signature is also a required part of the safety application development process. Safety signatures are created by the safety controller. The safety signature consists of an identification number, date, and time that uniquely identifies the safety portion of a project. This includes all safety logic, data, and safety I/O configuration.
For safety system requirements, including information on the safety network number (SNN), verifying the safety signature, functional verification test intervals, system reaction time, and PFD/PFH calculations, refer to the following publications.
For safety requirements in Refer to
GuardLogix controller systems GuardLogix 5570 Controller Systems Safety Reference
Manual, publication 1756-RM099
SmartGuard 600 controller systems SmartGuard 600 Controllers Safety Reference Manual,
publication 1752-RM001
You must read, understand, and fulfill the requirements detailed in these publications prior to operating a safety system that uses POINT Guard I/O modules.
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 21
Chapter 1 POINT Guard I/O Overview
Notes:
22 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Chapter 2
Output OFF
Input
Inputs to Network OFFNetworks
Safety Status
44076
Safety Inputs, Safety Outputs, and Safety Data
Top ic Pag e
Safe States 23
Safety Inputs (1734-IB8S) 24
Safety Analog Inputs (1734-IE4S) 31
Safety Outputs (1734-OB8S) 39
I/O Status Data 42

Safe States

POINT Guard Digital I/O Modules

ATTENTION:
The safe state of the outputs is defined as the off state.
The safe state of the module and its data is defined as the off state.
Use the POINT Guard I/O module only in applications where the off state is the
safe state.
These are the safe states of the digital POINT Guard I/O modules:
Safety outputs: OFF
Safety input data to network: OFF (single channel and
dual-channel equivalent)
Safety input data to network: OFF/ON for input channels n/n+1 (dual-channel complimentary)
Figure 3 - Safety Status
The module is designed for use in applications where the safe state is the off state.
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 23
Chapter 2 Safety Inputs, Safety Outputs, and Safety Data
TIP
Where: T0 = Test Output 0 T1M = Test Output 1 with Muting T2 = Test Output 2 T3M = Test Output 3 with Muting I0…I7 = Safety Inputs
Safety Input Ter m in a l
External Contac t

POINT Guard I/O Analog Input Module

These are the safe states of the POINT Guard I/O analog input module:
Safety input data to network in single-channel configuration: 0 (OFF)
Safety input data to network in dual-channel equivalent configuration:If a diagnostic fault occurs, the signal for the faulted channel is set to 0
(OFF).
– If a dual-channel discrepancy fault occurs, the dual-channel inputs
continue to report actual input signals.

Safety Inputs (1734-IB8S)

Safety inputs are used to monitor safety input devices.

Using a Test Output with a Safety Input

A test output can be used in combination with a safety input for short circuit, cross-channel, and open-circuit fault detection. Configure the test output as a pulse test source and associate it to a specific safety input.
The test output can also be configured as a power supply to source 24V DC to an external device, for example, a light curtain.
Figure 4 - Example Use of a POINT Guard I/O Input Module
I0 I1 I4 I5
0
I2 I3 I6 I7
2
COM COM COM COM
4
TO T1M T2 T3M
6
1
3
5
7
0
2
4
6
1
3
5
7
24 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Safety Inputs, Safety Outputs, and Safety Data Chapter 2
X
OUT
Y
On
Off
External Contact
Short-circuit between Input Signal Lines and Power Supply (positive side)
External Contact
Short-circuit between Input Signal Lines
44079
Figure 5 - Test Pulse in a Cycle
For the 1734-IB8S module, the pulse width (X) is typically 525 μs; the pulse period (Y) is typically 144 ms.
When the external input contact is closed, a test pulse is output from the test output terminal to diagnose the field wiring and input circuitry. By using this function, short-circuits between inputs and 24V power, and between input signal lines and open circuits can be detected.
Figure 6 - Short-circuit between Input Signal Lines
24V
IN+
COM
T0
24V 0V
IN0
T1
IN1
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 25
Chapter 2 Safety Inputs, Safety Outputs, and Safety Data
24V
0V
Tes t O utp ut 0
Input Terminal 0
External Device
Faul t De tect ed
ON
OFF
ON
OFF
ON
OFF
ON
OFF
24V
0V
ON
OFF
Safety Input 0 Status
Fault Detection
ON
OFF
ON
OFF
ON
OFF
Safety Input 0 Status
Safety Input 0 Data
Safety Input 0 Data
Input Terminal 0
Normal Operation
External Device
Tes t O utp ut 0
Safety I/O Network Data Sent to the Control ler
Safety I/O Network Data Sent to the Control ler

Single-channel Mode

If an error is detected, safety input data and safety input status turn off.
Figure 7 - Normal Operation and Fault Detection (not to scale)
26 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Safety Inputs, Safety Outputs, and Safety Data Chapter 2
IMPORTANT
IMPORTANT

Dual-channel Mode and Discrepancy Time

To support dual-channel safety devices, the consistency between signals on two channels can be evaluated. Either equivalent or complementary can be selected.
If the length of a discrepancy between the channels exceeds the configured discrepancy time (0…65,530 ms in increments of 10 ms), the safety input data and the individual-safety input status turn off for both channels. In Dual-channel Complimentary mode, the safety input data goes to off/on for input channels n/n+1 respectively as described in Ta b l e 3
The dual-channel function is used with two consecutive inputs that are paired together, starting at an even input number, such as inputs 0 and 1, 2 and 3, and so on.
If you are using the safety application instructions with a GuardLogix controller, set the module’s inputs to Single (default). Do not use the modules’ dual-channel mode as this functionality is provided by the safety application instructions.
.
This table shows the relation between input terminal states and controller input data and status.
Table 3 - Terminal Input Status and Controller I/O Data
Dual-channel Mode Input Terminal Controller Input Data and Status Dual-channel
IN0 IN1 Safety
Input 0 Data
Dual-channels, Equivalent OFF OFF OFF OFF ON ON OFF Normal
OFF ON OFF OFF OFF OFF OFF Fault ON OFF OFF OFF OFF OFF OFF Fault ON ON ON ON ON ON ON Normal
Dual-channels, Complementary OFF OFF OFF ON OFF OFF OFF Fault
OFF ON OFF ON ON ON OFF Normal ON OFF ON OFF ON ON ON Normal ON ON OFF ON OFF OFF OFF Fault
Safety Input 1 Data
Safety Input 0 Status
Safety Input 1 Status
Resultant Data
Dual-channel Resultant
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 27
Chapter 2 Safety Inputs, Safety Outputs, and Safety Data
ON
OFF
IN0
Safety Input 0 Data
IN1
Faul t Dete cted
Discrepancy Time
Safety I/O Network Data Sent to the Control ler
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
IN0
Safety Input 0, 1 Status
IN1
Fault Detection
ON
OFF
ON
OFF
ON
OFF
Discrepancy Time
Safety Input 0, 1 Status
Safety Input 1 Data
Safety Input 1 Data
Safety Input 0 Data
Normal Operation
Safety I/O Network Data Sent to the Contro ller

Dual-channel, Equivalent

In Equivalent mode, both inputs of a pair should be in the same (equivalent) state. When a transition occurs in one channel of the pair prior to the transition of the second channel of the pair, a discrepancy occurs. If the second channel transitions to the appropriate state prior to the discrepancy time elapsing, the inputs are considered equivalent. If the second transition does not occur before the discrepancy time elapses, the channels will fault. In the fault state, the input and status for both channels are set low (OFF). When configured as an equivalent dual pair, the data bits for both channels will always be sent to the controller as equivalent, both high or both low.
Figure 8 - Equivalent, Normal Operation and Fault Detection (not to scale)
28 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Safety Inputs, Safety Outputs, and Safety Data Chapter 2
ON
OFF
IN0
Safety Input 0 Data
IN1
Faul t Dete cted
Discrepancy Time
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
IN0
Safety Input 0, 1 Status
IN1
Fault Detect ion
ON
OFF
ON
OFF
ON
OFF
Discrepancy Time
Safety Input 0, 1 Status
Safety Input 1 Data
Safety Input 1 Data
Safety Input 0 Data
Normal Operation
Safety I/O Network Data Sent to the Control ler
Safety I/O Network Data Sent to the Control ler

Dual-channels, Complementary

In Complementary mode, the inputs of a pair should be in the opposite (complementary) state. When a transition occurs in one channel of the pair prior to the transition of the second channel of the pair, a discrepancy occurs. If the second channel transitions to the appropriate state prior to the discrepancy time elapsing, the inputs are considered complementary.
If the second transition does not occur before the discrepancy time elapses, the channels will fault. The fault state of complementary inputs is the even-numbered input turned off and the odd-numbered input turned ON. Note that if faulted, both channel status bits are set low. When configured as a complementary dual-channel pair, the data bits for both channels will always be sent to the controller in complementary, or opposite states.
Figure 9 - Complementary, Normal Operation and Fault Detection (not to scale)
Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 29
Chapter 2 Safety Inputs, Safety Outputs, and Safety Data
44094
On-delay
ON OFF
ON OFF
Input Signal
Safety Input Network Data
44095
Safety Input Network Data
Off-delay
Input Signal
ON OFF
ON OFF

Safety Input Fault Recovery

If an error is detected, the safety input data remains in the OFF state. Follow this procedure to activate the safety input data again.
1. Remove the cause of the error.
2. Place the safety input (or safety inputs) into the safe state.
3. Allow the input-error latch time to elapse.
After these steps are completed, the I/O indicator (red) turns off. The input data is now active.

Input Delays

On-delay—An input signal is treated as Logic 0 during the on-delay time (0…126 ms, in increments of 6 ms) after the input contact’s rising edge. The input turns on only if the input contact remains on after the on-delay time has elapsed. This helps prevent rapid changes of the input data due to contact bounce.
Figure 10 - On-delay
Off-delay—An input signal is treated as Logic 1 during the off-delay time (0…126 ms, in increments of 6 ms) after the input contact’s falling edge. The input turns off only if the input contact remains off after the off delay time has elapsed. This helps prevent rapid changes of the input data due to contact bounce.
Figure 11 - Off-delay
30 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
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