Rockwell Automation 1756-OF8H User Manual
User Manual
ControlLogix HART Analog I/O Modules
Catalog Numbers
1756-IF8H, 1756-IF16H, 1756-OF8H
Important User Information
IMPORTANT
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
your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/
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.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.
available from
) describes some
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
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.
Identifies information that is critical for successful application and understanding of the product.
Allen-Bradley, Rockwell Software, Rockwell Automation, ControlLogix, RSLogix 5000, L ogix5000, RSLinx, FactoryTalk AssetCentre, and TechConnect are trademarks of Rockwell 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 changes bars, as shown to the right of this paragraph.
New and Updated
Information
This table contains the changes made to this revision.
Topic Page
Additional Input Data tag, Analog and HART by Channel, is available
for the 1756-IF8H and 1756-OF8H analog I/O modules.
Power supply wiring diagrams are available for the
1756-IF8H analog input module.
Unicast connection to streamline EtherNet/IP network broadcast
traffic is available for the 1756-IF8H and 1756-OF8H analog
I/O modules.
Additional device diagnostics are available on the HART Device
Info tab.
Tag definitions are updated for the 1756-IF8H and 1756-OF8H analog
I/O modules.
Manufacturer identification codes are updated. 205
54, 80
61
51, 93
111
163
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 3
Summary of Changes
4 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Table of Contents
Preface
ControlLogix HART
Analog I/O Modules
Module Installation
Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Module Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
HART Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Integrated HART Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
HART-enabled I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Asset Management Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electronic Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Exact Match . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Compatible Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Disabled Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Timestamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Module Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Chapter 2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Environment and Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Preventing Electrostatic Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
European Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
North American Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . 27
Removal and Insertion Under Power (RIUP). . . . . . . . . . . . . . . . . . . . . . . 28
Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Module Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Install the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Key the Removable Terminal Block/Interface Module . . . . . . . . . . . . . . 31
Wire the Removable Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Ground the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Connect the Grounded End of the Cable. . . . . . . . . . . . . . . . . . . . . . . 32
Connect the Ungrounded End of the Cable . . . . . . . . . . . . . . . . . . . . 33
Wire the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Removal Terminal Block Assembly and Installation. . . . . . . . . . . . . . . . . 34
Assemble the Removable Terminal Block and the Housing . . . . . . 34
Install the Removable Terminal Block. . . . . . . . . . . . . . . . . . . . . . . . . . 35
Remove the Removable Terminal Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Remove the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 5
Table of Contents
Chapter 3
ControlLogix Module Operation
1756-IF8H HART Analog
Input Module
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Direct Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Input Module Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Input Modules in a Local Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Real Time Sample (RTS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Requested Packet Interval (RPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Trigger Event Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Input Modules in a Remote Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Remote Input Modules Connected Via ControlNet Network . . . . 44
Remote Input Modules Connected Via EtherNet/IP Network . . . 45
Output Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Output Modules in a Local Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Output Modules in a Remote Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Remote Output Modules Connected Via ControlNet Network . . 47
Remote Output Modules Connected Via EtherNet/IP Network . 48
Listen-only Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Multiple Owners of Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Configuration Changes in an Input Module with Multiple Owners. . . 51
Unicast Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Chapter 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Module Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Input Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Module Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Real Time Sampling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Underrange and Overrange Detection . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Process Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Rate Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Wire-off Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
1756-IF8H Module Fault and Status Reporting. . . . . . . . . . . . . . . . . . . . . 63
1756-IF8H Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
1756-IF8H Module Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
1756-IF8H Channel Fault Tags. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
1756-IF8H Channel Status Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Specifications and Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Chapter 5
Table of Contents
1756-IF16H HART
Analog Input Module
1756-OF8H HART
Analog Output Module
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Module Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Input Ranges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Module Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Real Time Sampling (RTS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Underrange and Overrange Detection. . . . . . . . . . . . . . . . . . . . . . . . . . 70
Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Wire-off Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
1756-IF16H Module Fault and Status Reporting . . . . . . . . . . . . . . . . . . . 75
1756-IF16H Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
1756-IF16H Module Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . 77
1756-IF16H Channel Fault Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
1756-IF16H Channel Status Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Specifications and Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Chapter 6
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Module Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Ramping/Rate Limiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Hold for Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Open Wire Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Clamping and Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Clamp and Limit Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Data Echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Wire the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Use Module Block and Output Circuit Diagrams . . . . . . . . . . . . . . . . . . . 84
1756-OF8H Module Fault and Status Reporting . . . . . . . . . . . . . . . . . . . 85
1756-OF8H Fault Reporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Module Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Channel Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Channel Status Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Specifications and Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 7
Table of Contents
Chapter 7
Configure the Modules with
RSLogix 5000 Software
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Create a New Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
General Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
HART Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Connection Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Module Info Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Coordinated System Time (CST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Refresh or Reset Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Applying Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Configuration Tab - Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Configure the Individual Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Scaling to Engineering Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Configure All Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Module Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Alarm Tab - 1756-IF8H Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Configuration Tab - Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Configure Individual Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Configure All Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Output State Tab - Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Ramp Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Output State in Program Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Output State in Fault Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Communication Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Limits Tab - Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
HART Device Info Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Data in the Input Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
HART Dynamic Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
How the Module Automatically Collects Data . . . . . . . . . . . . . . . . . 117
Chapter 8
Getting HART Data
By Using CIP MSG
8 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Using MSG Instructions to Access the HART Object . . . . . . . . . . . . . . 122
CIP Services to Access Common HART Data . . . . . . . . . . . . . . . . . . . . . 123
Read Dynamic Variables (Service Code = 16#4B) . . . . . . . . . . . . . . 123
Read Additional Status (Service Code = 16#4C) . . . . . . . . . . . . . . . 125
Get Device Information (Service Code = 16#4D) . . . . . . . . . . . . . . 126
Getting HART Device Information By Using CIP Generic MSG . . . 128
CIP Services to Pass-through a HART Message to the
HART Field Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
HART Module Scanning Diagram with Pass-through Messages . . . . . 133
HART Pass-through CIP Message Layout Details. . . . . . . . . . . . . . . . . . 134
Pass-through Init (Service Code= 16#4E). . . . . . . . . . . . . . . . . . . . . . 134
Pass-through Query (Service Code= 16#4F) . . . . . . . . . . . . . . . . . . . 134
Table of Contents
Flush Queue (Service Code= 16#50). . . . . . . . . . . . . . . . . . . . . . . . . . 136
HART Pass-through Message Ladder Logic Example. . . . . . . . . . . . . . . 136
Chapter 9
HART Modules Used with Asset
Management Software
Unlatch Alarms and
Reconfigure Modules
By Using Ladder Logic
Module Troubleshooting
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Considerations for Asset Management Systems . . . . . . . . . . . . . . . . . . . . 141
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Chapter 10
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Using Message Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Processing Real-time Control and Module Services. . . . . . . . . . . . . 146
One Service Performed Per Instruction. . . . . . . . . . . . . . . . . . . . . . . . 146
Creating a New Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Enter Message Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Unlatch Alarms in the 1756-IF8H Module. . . . . . . . . . . . . . . . . . . . . . . . 150
Unlatch Alarms in the 1756-OF8H Module. . . . . . . . . . . . . . . . . . . . . . . 152
Reconfigure a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Chapter 11
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Use Module Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
General Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Use RSLogix 5000 Software to Troubleshoot a Module . . . . . . . . . . . . 159
Module Configuration Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Additional Fault Codes - Module Level. . . . . . . . . . . . . . . . . . . . . . . . 160
Additional Fault Codes - Channel Level. . . . . . . . . . . . . . . . . . . . . . . 161
Tag Definitions
Appendix A
Communication Mode Member Names and Definitions . . . . . . . . . . . 163
Module-defined Data Types, 1756-IF8H Module. . . . . . . . . . . . . . . . . . 164
Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Analog Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Analog and HART PV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Analog and HART by Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Module-defined Data Types, 1756-IF16H Module . . . . . . . . . . . . . . . . 173
Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Analog Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Analog and HART PV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Analog and HART by Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Module-defined Data Types, 1756-OF8H Module. . . . . . . . . . . . . . . . . 181
Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Analog Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Analog and HART PV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 9
Table of Contents
Analog and HART by Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Appendix B
Use 1492 Wiring Systems
Wiring System Uses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
with Your Analog I/O Module
Appendix C
Additional HART
Protocol Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Message Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Response Code and Field Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
HART PV, SV, TV, and FV Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Appendix D
Manufacturer ID Codes
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Appendix E
Engineering Unit Code Numbers
Code Number Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Glossary
Master-slave Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Multiple Master Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Transaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Index
10 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Preface
This manual describes how to install, configure, and troubleshoot ControlLogix
highway addressable remote transducer (HART) analog I/O modules.
Audience
Additional Resources
You must be able to program and operate a Rockwell Automation ControlLogix
controller to efficiently use your analog I/O modules. In this manual, we assume
that you know how to do this. If you do not, before attempting to use this
module, refer to the Logix5000 controller documentation, as listed in the
related table.
These documents contain additional information concerning related Rockwell
Automation products.
Resource Description
ControlLogix HART Analog I/O Modules Release
Notes, publication 1756-RN636
Logix5000 Controllers Common Procedures
Programming Manual, publication 1756-PM001
ControlLogix System User Manual,
publication 1756-UM001
1756 ControlLogix I/O Modules Specifications
Technical Data, publication 1756-TD002
Industrial Automation Wiring and Grounding
Guidelines, publication1770-4.1
Product Certifications website,
http://www.ab.com
Contains release information about the
ControlLogix analog modules with
HART protocol.
Provides access to a collection of programming
manuals that describe procedures that are
common to all Logix5000 controller projects.
Provides configuration and operational
procedures for ControlLogix controllers.
Publication provides specifications for the
1756-IF8H and 1756-OF8H analog I/O modules.
Provides general guidelines for installing a
Rockwell Automation industrial system.
Provides declarations of conformity, certificates,
and other certification details.
You can view or download publications at http://www.rockwellautomation.com/
literature/. To order paper copies of technical documentation, contact your local
Rockwell Automation distributor or sales representative.
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 11
Preface
Notes:
12 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Chapter
ControlLogix HART Analog I/O Modules
1
Introduction
ControlLogix HART analog I/O modules connect a Logix controller to your
process. 1756-IF8H and 1756-IF16H input modules receive the signals from
process value transmitters and convert them to temperature, flow, pressure, pH,
and other measurements for use in the Logix controller. By using 1756-OF8H
HART output modules, the controller adjusts the setting of valves and other
devices to keep your process running as desired.
Using instruments that support the HART protocol allows measuring several
process parameters with a single field device, provides enhanced status and
diagnostics, and allows remote configuration and troubleshooting.
The table explains the topics discussed in this chapter.
Topic Page
Module Components 14
HART Communication 14
Asset Management Software 17
Electronic Keying 17
Timestamping 23
Module Scaling 24
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 13
Chapter 1 ControlLogix HART Analog I/O Modules
Removable
Te rm in al
Block (RTB)
45118
1
2
3
4
5
6
Module Components
# Physical Feature Description
1 Backplane connector The backplane connector interface for the ControlLogix system connects the module to the ControlBus backplane.
2 Connector pins Input/output, power, and grounding connections are made to the module through these pins with the use of a
removable terminal block (RTB) or interface module (IFM).
3 Locking tab The locking tab anchors the RTB or IFM cable on the module, maintaining wiring connections.
4 Slots for keying Mechanically keys the RTB to prevent inadvertently making the wrong wire connections to the module.
5 Status indicators Indicators display the status of communication, module health, and input and output devices. Use these indicators
to help in troubleshooting.
6 Top and bottom guides Guides provide assistance in seating the RTB or IFM cable onto the module.
This figure shows the physical features of the ControlLogix analog I/O modules.
HART Communication
The HART field communication protocol is widely accepted in industry as a
standard for digitally enhanced 4…20 mA communication with smart
(microprocessor-based) field devices. A digital signal is superimposed onto the
4…20 mA current loop to provide two means of communication from the device.
The 4…20 mA analog channel lets a single process variable be communicated at
the fastest possible rate while the digital channel provides access to multiple
process variables, data quality, and device status information. The HART
protocol lets these simultaneous communication channels be used in a
complementary fashion.
The modules support the HART protocol and perform these distinct operations:
• Convert to or from 4…20 mA analog signals and digital numeric values in
engineering units used in the Logix controller.
• Collect dynamic process data automatically from the connected HART
field device, such as temperature, pressure, flow, or valve position.
• Configure and troubleshoot the HART Field Device by using FactoryTalk
AssetCentre service from your control room.
14 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
ControlLogix HART Analog I/O Modules Chapter 1
Analog
Signal
The Highway Addressable Remote Transducer
(HART) protocol supports two-way digital
communication, complements traditional
4…20 mA analog signals, and includes the
following features:
· Predefined commands
- Common practice
- General purpose
- Device specific
· Large installed base
· Worldwide support
Analog
Signal
+0.5 mA
0.5 mA
0
1200
Hz
"1"
2200
Hz
"0"
HART Signal
Time (seconds)
0 1 2
20 mA
Analog
Signal
4 mA
See the figure
(1)
that shows information about the HART protocol.
With the ControlLogix HART analog I/O modules, field device data can be
accessed by both the controller and device maintenance and management
software.
The ControlLogix HART analog I/O modules support Command-response
communication protocol and point-to-point wiring architecture.
(1) The figure is from the HART Communication Protocol Specifications, April, 2001, Revision 6.0, HART
Communication Foundation, All Rights Reserved.
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 15
Chapter 1 ControlLogix HART Analog I/O Modules
Primary Master
Secondary Master
(handheld communicator
as secondary master)
Slave
44219
Commands can be accepted from either of two master devices. The controller is
one of the master devices and continuously obtains information from the field
device. The second master can typically be device maintenance, for example a
handheld communicator, as shown below.
Integrated HART Networks
Most transmitters are available with a HART protocol interface. The type of data
available is dependent on the type of instrument.
An example application is a smart mass flowmeter. By using just the standard
mA signal from the flowmeter it provides one field measurement - flow. By using
the mA signal with HART provides additional process information. The
mA signal representing flow is still available. The HART configuration of the
flowmeter can be set for primary value (PV)
(SV) being static pressure, third value (TV) being temperature, and
fourth value (FV)
being a digital representation of the mA signal.
In addition to these additional process variables, device status is also provided via
HART. Instead of one process variable, the controller sees four process variables,
has a check on the mA signal, and has a reading of device status. HART
connectivity provides all this with no changes to the existing 4…20 mA wiring.
This HART connectivity also provides remote configuration and
troubleshooting of field devices by using software, such as FactoryTalk
AssetCentre or Endress+Hauser FieldCare software.
being mass flow, secondary value
16 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
HART-enabled I/O Modules
The ControlLogix HART analog I/O modules have HART modems built in,
so there is no need to install external HART multiplexors or clip on
HART modems.
ControlLogix HART Analog I/O Modules Chapter 1
EtherNet/IP Network
Asset Management Software
44220
Asset Management
Software
Electronic Keying
You can use the modules with asset management software. The following figure
shows the use of asset management software, such as FactoryTalk AssetCentre
software or Endress+Hauser FieldCare software.
The electronic keying feature automatically compares the expected module, as
shown in the RSLogix 5000 I/O Configuration tree, to the physical module
before I/O communication begins. You can use electronic keying to help prevent
communication to a module that does not match the type and revision expected.
For each module in the I/O Configuration tree, the user-selected keying option
determines if, and how, an electronic keying check is performed. Typically, three
keying options are available.
• Exact Match
• Compatible Keying
• Disable Keying
You must carefully consider the benefits and implications of each keying option
when selecting between them. For some specific module types, fewer options are
available.
Electronic keying is based on a set of attributes unique to each product revision.
When a Logix5000 controller begins communicating with a module, this set of
keying attributes is considered.
Table 1 - Keying Attributes
Attribute Description
Vendor The manufacturer of the module, for example, Rockwell Automation/Allen-Bradley.
Product Type The general type of the module, for example, communication adapter, AC drive, or digital I/O.
Product Code The specific type of module, generally represented by its catalog number, for example, 1756-IB16I.
Major Revision A number that represents the functional capabilities and data exchange formats of the module. Typically, although not always, a later,
Minor Revision A number that indicates the module’s specific firmware revision. Minor Revisions typically do not impact data compatibility but may
that is higher, Major Revision supports at least all of the data formats supported by an earlier, that is lower, Major Revision of the same
catalog number and, possibly, additional ones.
indicate performance or behavior improvement.
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 17
Chapter 1 ControlLogix HART Analog I/O Modules
IMPORTANT
You can find revision information on the General tab of a module’s Properties
dialog box.
Figure 1 - General Tab
Changing electronic keying selections online may cause the I/O
communication connection to the module to be disrupted and may
result in a loss of data.
Exact Match
Exact Match keying requires all keying attributes, that is, Vendor, Product Type,
Product Code (catalog number), Major Revision, and Minor Revision, of the
physical module and the module created in the software to match precisely to
establish communication. If any attribute does not match precisely, I/O
communication is not permitted with the module or with modules connected
through it, as in the case of a communication module.
Use Exact Match keying when you need the system to verify that the module
revisions in use are exactly as specified in the project, such as for use in highlyregulated industries. Exact Match keying is also necessary to enable Automatic
Firmware Update for the module via the Firmware Supervisor feature from a
Logix5000 controller.
18 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
ControlLogix HART Analog I/O Modules Chapter 1
EXAMPLE
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 3
Minor Revision = 1
Communication is prevented.
Physical Module
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 3
Minor Revision = 2
IMPORTANT
In the following scenario, Exact Match keying prevents I/O communication.
The module configuration is for a 1756-IB16D module with module revision 3.1. The physical module is a 1756-IB16D
module with module revision 3.2. In this case, communication is prevented because the Minor Revision of the module
does not match precisely.
Changing electronic keying selections online may cause the I/O
Communication connection to the module to be disrupted and may
result in a loss of data.
Compatible Keying
Compatible keying indicates that the module determines whether to accept or
reject communication. Different module families, communication adapters, and
module types implement the compatibility check differently based on the family
capabilities and on prior knowledge of compatible products.
Compatible keying is the default setting. Compatible keying allows the physical
module to accept the key of the module configured in the software, provided that
the configured module is one the physical module is capable of emulating. The
exact level of emulation required is product and revision specific.
With Compatible keying, you can replace a module of a certain Major Revision
with one of the same catalog number and the same or later, that is higher, Major
Revision. In some cases, the selection makes it possible to use a replacement that is
a different catalog number than the original. For example, you can replace a
1756-CNBR module with a 1756-CN2R module.
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 19
Chapter 1 ControlLogix HART Analog I/O Modules
EXAMPLE
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 3
Minor Revision = 3
Physical Module
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 3
Minor Revision = 2
Communication is prevented.
In the following scenario, Compatible keying prevents I/O communication:
The module configuration is for a 1756-IB16D module with module revision 3.3. The physical module is a 1756-IB16D
module with module revision 3.2. In this case, communication is prevented because the minor revision of the module is
lower than expected and may not be compatible with 3.3.
Release notes for individual modules indicate the specific compatibility details.
When a module is created, the module developers consider the module’s
development history to implement capabilities that emulate those of the previous
module. However, the developers cannot know future developments. Because of
this, when a system is configured, we recommend that you configure the module
by using the earliest, that is, lowest, revision of the physical module that you
believe will be used in the system. By doing this, you can avoid the case of a
physical module rejecting the keying request because it is an earlier revision than
the one configured in the software.
20 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
ControlLogix HART Analog I/O Modules Chapter 1
EXAMPLE
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 2
Minor Revision = 1
Physical Module
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16D
Major Revision = 3
Minor Revision = 2
Communication is allowed.
IMPORTANT
In the following scenario, Compatible keying allows I/O communication:
The module configuration is for a 1756-IB16D module with module revision 2.1. The physical module is a 1756-IB16D
module with module revision 3.2. In this case, communication is allowed because the major revision of the physical
module is higher than expected and the module determines that it is compatible with the prior major revision.
Changing electronic keying selections online may cause the I/O
communication connection to the module to be disrupted and may result
in a loss of data.
Disabled Keying
Disabled keying indicates the keying attributes are not considered when
attempting to communicate with a module. Other attributes, such as data size and
format, are considered and must be acceptable before I/O communication is
established. With Disabled keying, I/O communication may occur with a
module other than the type specified in the I/O Configuration tree with
unpredictable results. We generally do not recommend using Disabled keying.
ATTENTION: Be extremely cautious when using Disabled keying; if used
incorrectly, this option can lead to personal injury or death, property
damage, or economic loss.
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 21
Chapter 1 ControlLogix HART Analog I/O Modules
EXAMPLE
EXAMPLE
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IA16
Major Revision = 3
Minor Revision = 1
Physical Module
Vendor = Allen-Bradley
Product Type = Analog Input
Module
Catalog Number = 1756-IF16
Major Revision = 3
Minor Revision = 2
Communication is prevented.
Module Configuration
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IA16
Major Revision = 2
Minor Revision = 1
Physical Module
Vendor = Allen-Bradley
Product Type = Digital Input
Module
Catalog Number = 1756-IB16
Major Revision = 3
Minor Revision = 2
Communication is allowed.
In the following scenario, Disable keying prevents I/O communication:
The module configuration is for a 1756-IA16 digital input module. The physical module is a 1756-IF16 analog input
module. In this case, communication is prevented because the analog module rejects the data formats that the
digital module configuration requests.
If you use Disabled keying, you must take full responsibility for understanding
whether the module that is being used can fulfill the functional requirements of
the application.
22 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
In the following scenario, Disable keying allows I/O communication:
The module configuration is for a 1756-IA16 digital input module. The physical module is a 1756-IB16 digital input
module. In this case, communication is allowed because the two digital modules share common data formats.
ControlLogix HART Analog I/O Modules Chapter 1
IMPORTANT
Changing electronic keying selections online may cause the I/O
communication connection to the module to be disrupted and may
result in a loss of data.
Timestamping
Controllers within the ControlLogix chassis maintain a system clock. This clock
is also known as the coordinated system time (CST). You can configure your
analog I/O modules to access this clock and timestamp input data or output echo
data when the module multicasts to the system.
This feature provides accurate calculations between events to help you identify
the sequence of events in either fault conditions or in the course of normal I/O
operations. The system clock can be used between multiple modules in the
same chassis.
Each module maintains a rolling timestamp that is unrelated to the coordinated
system time. The rolling timestamp is a continuously running 15-bit timer that
counts in milliseconds.
For input modules, whenever a module scans its channels, it also records the value
of the rolling timestamp at that time. Your program can then use the last two
rolling timestamp values and calculate the interval between receipt of data or the
time when new data was received.
For output modules, the rolling timestamp value is updated only when new values
are applied to the Digital to Analog Converter (DAC).
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 23
Chapter 1 ControlLogix HART Analog I/O Modules
Module Scaling
When using scaling, you change a quantity from one notation to another.
To scale a channel, choose two points along the module's operating range and
apply corresponding low and high unit values to those points.
Scaling lets you configure the module to return data to the controller in units that
match the quantity being measured. For example, the analog input module can
provide the temperature in degrees Celsius or the pressure in mbar. An analog
output module might have commanded values represented in % of stroke of a
valve. This makes it easier to use the values in your control program than by using
the raw signal value in mA.
Units like gallons, percent, mbar, psi, celsius, liters, and liters/minute are referred
to as Engineering Units.
For more information about scaling, see Scaling to Engineering Units on page 98
.
24 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Module Installation
Chapter
2
Introduction
The 1756-IF8H, 1756-OF8H, and 1756-IF16H analog modules use the HART
protocol with eight and 16 channels, respectively. This chapter describes basic
installation procedures.
The table explains the topics discussed in this chapter.
Topic Page
Environment and Enclosure 26
Preventing Electrostatic Discharge 26
European Hazardous Location Approval 26
North American Hazardous Location Approval 27
Removal and Insertion Under Power (RIUP) 28
Before You Begin 28
Module Accessories 28
Power Requirements 29
Install the Module 30
Key the Removable Terminal Block/Interface Module 31
Wire the Removable Terminal Block 32
Ground the Module 32
Wire the Module 34
Removal Terminal Block Assembly and Installation 34
Remove the Removable Terminal Block 36
Remove the Module 37
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 25
Chapter 2 Module Installation
Environment and Enclosure
ATT ENTI ON: This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as defined in
IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR 11. Without appropriate precautions, there may be
difficulties with electromagnetic compatibility in residential and other
environments due to conducted and radiated disturbances.
This equipment is supplied as open-type equipment. It must be mounted
within an enclosure that is suitably designed for those specific environmental
conditions that will be present and appropriately designed to prevent
personal injury resulting from accessibility to live parts. The enclosure must
have suitable flame-retardant properties to prevent or minimize the spread of
flame, complying with a flame spread rating of 5VA, V2, V1, V0 (or equivalent)
if non-metallic. The interior of the enclosure must be accessible only by the
use of a tool. Subsequent sections of this publication may contain additional
information regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.
In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1
, for additional installation requirements
• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the
degrees of protection provided by enclosures
Preventing Electrostatic Discharge
European Hazardous Location Approval
ATTENTION: This equipment is sensitive to electrostatic discharge, which
can cause internal damage and affect normal operation. Follow these
guidelines when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in
use.
European Zone 2 Certification
(The following applies when the product bears the EX marking.)
This equipment is intended for use in potentially explosive atmospheres as defined by
European Union Directive 94/9/EC and has been found to comply with the Essential
Health and Safety Requirements relating to the design and construction of Category 3
equipment intended for use in Zone 2 potentially explosive atmospheres, given in Annex II
to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-15 and EN 60079-0.
26 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
North American Hazardous Location Approval
Module Installation Chapter 2
WARNING:
• This equipment must be installed in an enclosure providing at least IP54
protection when applied in Zone 2 environments.
• This equipment shall be used within its specified ratings defined by
Rockwell Automation.
• Provision shall be made to prevent the rated voltage from being exceeded
by transient disturbances of more than 40% when applied in Zone 2
environments.
• This equipment must be used only with ATEX certified Rockwell
Automation backplanes.
• Secure any external connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or other means provided
with this product.
• Do not disconnect equipment unless power has been removed or the area
is known to be nonhazardous.
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.
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 27
Chapter 2 Module Installation
IMPORTANT
Removal and Insertion Under Power (RIUP)
Before You Begin
WARNING: 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. Repeated electrical arcing causes excessive wear to contacts on
both the module and its mating connector. Worn contacts may create
electrical resistance that can affect module operation.
ATTENTION: This equipment is not resistant to sunlight or other sources
of UV radiation.
Before you install your module, you should have already:
• Installed and grounded a 1756 chassis and power supply.
• Ordered and received a removable terminal block (RTB) or
1492 interface module (IFM) and its components for your application.
Module Accessories
These modules mount in a ControlLogix chassis and use a separately-ordered
removable terminal block (RTB) or a 1492 interface module (IFM) to connect all
field-side wiring.
The ControlLogix HART analog modules use one of the following RTBs and
support these IFMs.
Module RTBs
1756-IF8H • 1756-TBCH 36-position cage clamp RTB
1756-IF16H • 1756-TBCH 36-position cage clamp RTB
1756-OF8H • 1756-TBNH 20-position NEMA RTB
(1) Use an extended-depth cover (1756-TBE) for applications with heavy gauge wiring or requiring additional
routing space.
(2) See the IFMs for the respective modules on page 192. Consult the documentation that came with it to connect
all wiring.
(1)
• 1756-TBS6H 36-position spring clamp RTB
• 1756-TBS6H 36-position spring clamp RTB
• 1756-TBSH 20-position spring clamp RTB
ATTENTION: The ControlLogix system has been agency certified using only
the ControlLogix RTBs (catalog numbers 1756-TBCH and 1756-TBS6H). Any
application that requires agency certification of the ControlLogix system
using other wiring termination methods may require application specific
approval by the certifying agency.
(2)
IFMs
• 1492-ACABLExUD (current)
• 1492-ACABLExUC (voltage)
• 1492-ACABLExUB
• 1492-ACABLExWB (current)
• 1492-ACABLExWA (voltage)
28 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Module Installation Chapter 2
IMPORTANT
Power Requirements
ATTENTION: To comply with the CE low voltage directive (LVD), all
connected I/O must be powered from a source compliant with safety extra
low voltage (SELV) or protected extra low voltage (PELV).
WARNING: Use supply wires suitable for 30 °C (86 °F) above
surrounding ambient.
These modules receive power from the 1756 chassis power supply and require
these two sources of power from the backplane.
Module Power Requirements, max
1756-IF8H • 300 mA at 5.1V DC
• 135 mA at 24V DC
1756-IF16H • 200 mA at 5.1V DC
• 125 mA at 24V DC
1756-OF8H • 200 mA at 5.1 V DC
• 230 mA at 24 V DC
The 1756-OF8H module requires more power than the standard 1756-OF8
module. You can have a maximum of 12 1756-OF8H modules per chassis.
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.
Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 29
Chapter 2 Module Installation
20861
Locking Tab
20862
Install the Module
You can install or remove the module while chassis power is applied.
ATTENTION: The module is designed to support removal and insertion
under power (RIUP). However, when you remove or insert an RTB with fieldside power applied, unintended machine motion or loss of process control
can occur. Exercise extreme caution when using this feature.
1. Align the circuit board with the top and bottom chassis guides.
2. Slide the module into the chassis until the module locking tabs click.
30 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
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