Rockwell Automation Allen-Bradley 1794-IB16D User manual

User Manual
FLEX I/O Diagnostic Modules
Catalog Numbers 1794-IB16D, 1794-OB16D

Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety
Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from
your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) describes some
important differences between solid-state equipment and hard-wired electromechanical devices. Because of this difference,
and also because of the wide variety of uses for solid-state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Allen-Bradley, CompactLogix, ControlLogix, DriveLogix, FLEX, FlexLogix, Logix 5000, PLC-5, Rockwell Automation, RSLinx, RSLogix 5000, RSNetWorx, SoftLogix, and TechConnect are trademarks of
Rockwell Automation, Inc.
CIP, ControlNet, DeviceNet, and EtherNet/IP are trademarks of ODVA, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
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
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).
IMPORTANT
Identifies information that is critical for successful application and understanding of the product.

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 3
Table of Contents
Preface
Purpose of This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Important Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
North American Hazardous Location Approval. . . . . . . . . . . . . . . . . . . 9
Related Products and Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 1
1794 FLEX I/O Diagnostic Digital
Modules Overview
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Network Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1794-IB16D Diagnostic Input Module Compatibility . . . . . . . . . . . 16
1794-OB16D Diagnostic Output Module Compatibility . . . . . . . . 17
Install Your Digital Input or Output Module. . . . . . . . . . . . . . . . . . . . . . . 18
Chapter 2
About the FLEX I/O Diagnostic
Input Module
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
About the 1794-IB16D Diagnostic Input Module . . . . . . . . . . . . . . . . . . 21
Diagnostic Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Sensor Power Open and Short Circuit Detection. . . . . . . . . . . . . . . . 24
User Power Supply Reverse Voltage Detection . . . . . . . . . . . . . . . . . . 25
User Power Supply Loss Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Indicator Status Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Module Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Input Voltage Derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Sensor-Power Derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Unused Sensor Power Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Open Contact Mechanical Switches and Relays . . . . . . . . . . . . . . . . . 27
Sensor Power Internal Voltage Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Configure Your Diagnostic Input Module. . . . . . . . . . . . . . . . . . . . . . . . . . 28
Input Filter Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Chapter 3
About the FLEX I/O Diagnostic
Output Module
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
About the 1794-OB16D Diagnostic Output Module . . . . . . . . . . . . . . . 29
Wiring Output Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Diagnostic Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Module Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Output Fault & Idle States With Network Communication Failure .
33
Indicator Status Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Module Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Unused Output Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Configure Your Output Diagnostic Module. . . . . . . . . . . . . . . . . . . . . . . . 34

4Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Table of Contents
Chapter 4
Configuring Modules for
Communication on a Remote I/O
Network
Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Add a 1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Add a 1794 Remote Adapter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Configure Digital Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Create a Block Transfer (Read or Write) Message Instruction . . . . . . . . 44
Ladder Logic Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Chapter 5
Configure FLEX I/O Digital
Modules on a DeviceNet
Network
How to Use This Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Add the Scanner to the I/O Configuration of the Controller Using
RSLogix 5000 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
If You Need to Conserve EtherNet/IP or ControlNet Network
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Add the Scanner to the I/O Configuration Folder . . . . . . . . . . . . . . . 52
Define the Properties of the Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Determine the Address of DeviceNet Data . . . . . . . . . . . . . . . . . . . . . . . . . 54
Tally Memory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
If You Configure the Adapter Offline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Set the Address of the Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Chapter 6
Configure Your Adapter and
DigitalModulesona ControlNet
Network
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Set Up the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Setting a Requested Packet Interval (RPI) . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Select a Communication Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Direct or rack-optimized connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Ownership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Add Local and Remote ControlNet Modules . . . . . . . . . . . . . . . . . . . . . . . 67
Add Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Download the Program to the Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Configure the 1794-ACN15 Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Schedule I/O Module Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Access Module Data via the 1794-ACN15 Adapter . . . . . . . . . . . . . . . . . 77
Slot Status Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Change Configuration Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Chapter 7
Configure your Digital Module
on an EtherNet/IP Network
How to Use This Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Set Up the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Select a Requested Packet Interval (RPI). . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Select a Communication Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Choose Direct or Rack-optimized Connection . . . . . . . . . . . . . . . . . . 86
Ownership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 5
Table of Contents
Select a Remote Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Add Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Add a Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Download the Program to the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Access Distributed I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
General Information About IP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Determining Required Network Parameters . . . . . . . . . . . . . . . . . . . . 95
Assigning Network Parameters via the BOOTP/DHCP Utility. . . . . . 96
Using RSLinx software to set the IP address. . . . . . . . . . . . . . . . . . . . 100
Using RSLogix 5000 software to set the IP address . . . . . . . . . . . . . 101
Using DHCP software to set the IP address. . . . . . . . . . . . . . . . . . . . 102
Duplicate IP Address Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Duplicate detection scenarios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
IP Address Swapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Appendix A
Interpret the Indicators
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
About the Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
1794-IB16D Diagnostic Functional Details . . . . . . . . . . . . . . . . . . . . . . . 106
Diagnostic Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Diagnostic Functions for the 1794-IB16D. . . . . . . . . . . . . . . . . . . . . 108
1794-OB16D Diagnostic Functional Details . . . . . . . . . . . . . . . . . . . . . . 109
Diagnostic Functions for the 1794-OB16D. . . . . . . . . . . . . . . . . . . . 110
Appendix B
Simplified Schematics of FLEX
I/O Digital Modules
Find Your Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
1794-IA8 120V AC 8 Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . 112
1794-IA8I 120V AC 8 Input Module . . . . . . . . . . . . . . . . . . . . . . . . . 112
1794-IA16 120V AC 16 Input Module . . . . . . . . . . . . . . . . . . . . . . . 113
1794-OA8 120V AC 8 Output Module . . . . . . . . . . . . . . . . . . . . . . . 113
1794-OA8I 120V AC 8 Output Module . . . . . . . . . . . . . . . . . . . . . . 114
1794-OA16 120V AC 16 Output Module. . . . . . . . . . . . . . . . . . . . . 114
1794-IM 8 220V AC 8 Input Module . . . . . . . . . . . . . . . . . . . . . . . . . 115
1794-OM8 220V AC 8 Output Module . . . . . . . . . . . . . . . . . . . . . . 115
1794-IB8 24V DC 8 Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
1794-IB16 24V DC 16 Input Module. . . . . . . . . . . . . . . . . . . . . . . . . 116
1794-IB16D 24V DC 16 Diagnostic Input Module . . . . . . . . . . . . 117
1794-IB32 24V DC 32 Input Module. . . . . . . . . . . . . . . . . . . . . . . . . 118
1794-IB10XOB6 24V DC 8 10 Input/6 2A Output Module . . . 119
1794-IB16XOB16P 24V DC 16 Input/16 Output Module. . . . . 120
1794-IV16 24V DC 16 Source Input Module. . . . . . . . . . . . . . . . . . 121
1794-OB8 24V DC 8 Output Module . . . . . . . . . . . . . . . . . . . . . . . . 121
1794-OB8EP 24V DC Electronically Protected 8 Output Module . .
122
1794-OB16 24V DC 16 Output Module. . . . . . . . . . . . . . . . . . . . . . 122

6Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Table of Contents
1794-OB16D 24V DC 16 Diagnostic Output Module . . . . . . . . . 123
1794-OB16P 24V DC 16 Output Module. . . . . . . . . . . . . . . . . . . . . 123
1794-OB32P 24V DC 32 Output Module. . . . . . . . . . . . . . . . . . . . . 124
1794-OV16 24V DC 16 Sink Output Module . . . . . . . . . . . . . . . . . 125
1794-OV16P 24V DC 16 Sink Output Module. . . . . . . . . . . . . . . . 125
1794-IC 48V DC 16 Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
1794-OC 48V DC 16 Output Module . . . . . . . . . . . . . . . . . . . . . . . . 126
1794-OW8 Relay Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 7
Preface
Purpose of This Manual
This manual provides information on installation, setting, and reading your
diagnostics on the 1794-IB16D and the 1794-OB16D Diagnostic modules.
Important Warnings and
Cautions
Obey the following warnings and cautions when installing or using these
modules.
For information on See Chapter
1794 Diagnostic Modules 1
Specific Diagnostic Module 2 or 3
Using Diagnostic Modules in a Remote I/O System 4
Using Diagnostic Modules in a DeviceNet System 5
Using Diagnostic Modules in a ControlNet System 6
Using Diagnostic Modules in an EtherNet/IP System 7
Using the Indicators for Troubleshooting Appendix A
Simplified Schematics for all 1794 Digital Modules Appendix B
ATTENTION: Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2 industrial
environment, in overvoltage Category II applications (as defined in IEC
publication 60664-1), at altitudes up to 2000 meters without derating.
This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR Publication 11. Without appropriate precautions,
there may be potential difficulties ensuring electromagnetic compatibility in
other environments due to conducted as well as radiated disturbance.
This equipment is supplied as open-type equipment. It must be mounted
within an enclosure that is suitably designed for those specific
environmental conditions that will be present and appropriately designed to
prevent personal injury resulting from accessibility to live parts. The interior
of the enclosure must be accessible only by the use of a tool. Subsequent
sections of this publication may contain additional information regarding
specific enclosure type ratings that are required to comply with certain
product safety certifications.
See NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure. Also, see the appropriate sections in this
publication, as well as Industrial Automation Wiring and Grounding
Guidelines, Allen-Bradley publication 1770-4.1, for additional installation
requirements pertaining to this equipment.

8Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Preface
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.
ATTENTION: FLEX I/O is grounded through the DIN rail to chassis ground.
Use zinc-plated yellow-chromate steel DIN rail to assure proper grounding.
The use of other DIN rail materials (such as aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or
intermittent grounding.
ATTENTION: Prevent Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause
internal damage and affect normal operation. Follow these guidelines when
you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• If available, use a static-safe workstation.
ATTENTION: During mounting of all devices, be sure that all debris (such as
metal chips or wire strands) is kept from falling into the module. Debris that
falls into the module could cause damage on power-up.

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 9
Preface
North American Hazardous Location Approval
The 1794-IB16D and 1794-OB16D diagnostic modules are North American
Hazardous Location approved.
The following information applies when
operating this equipment in hazardous
locations:
Informations sur l’utilisation de cet
équipement en environnements dangereux :
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.
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.
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.
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.

10 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Preface
Related Products and
Documentation
For additional information on FLEX™ I/O systems and modules, refer to the
following documents:
Catalog
Number Voltage Description Publications
Installation
Instructions User Manual
1794 1794 FLEX I/O Selection Guide 1794–SG002
1794–ACN 24V DC ControlNet Adapter 1794–IN101
1794-AENT EtherNet/IP Adapter 1794-IN082 ENET-UM001
1794–ACNR 24V DC Redundant Media ControlNet Adapter 1794–IN101
1794–ACN15 24V DC ControlNet Adapter 1794-IN101 CNET-UM001
1794–ACNR15 24V DC Redundant Media ControlNet Adapter CNET-UM001
1794–ADN 24V DC DeviceNet Adapter 1794-IN099 1794–6.5.5
1794–ASB/E 24V DC Remote I/O Adapter 1794–IN098 1794–UM009
1794–ASB2/D 24V DC 2–Slot Remote I/O Adapter 1794–UM059
1794–APB 24V DC PROFIBUS Adapter 1794-IN087 1794–UM057
1794–IB8 24V DC 8 Sink Input Module 1794-IN093
1794–IB16 24V DC 16 Sink Input Module
1794–IB32 24V DC 32 Sink Input Module
1794–IV16 24V DC 16 Source Input Module 1794-IN095
1794–OV16 24V DC 16 Sink Output Module
1794–OV16P 24V DC 16 Protected Sink Output Module
1794–OB8 24V DC 8 Source Output Module 1794-IN094
1794–OB8EP 24V DC 8 Electronically Fused Output Module
1794–OB16 24V DC 16 Source Output Module
1794–OB16P 24V DC 16 Protected Source Output Module
1794–OB32P 24V DC 32 Protected Source Output Module
1794–IB10XOB6 24V DC 10 Input/6 Output Module 1794-IN083
1794–IB16XOB16P 24V DC 16 Input/16 Output Module
1794–OW8 24V DC 8 Relay Output Module 1794-IN019
1794–IE8 24V DC Analog 8 Input Module 1794-IN100 1794–6.5.2
1794–OE4 24V DC Analog 4 Output Module
1794–IE4XOE2 24V DC 4 Input/2 Output Analog Module
1794–OF4I 24V DC 4 Output Isolated Analog Module 1794-IN037 1794–6.5.8
1794–IF4I 24V DC 4 Input Isolated Analog Module 1794-IN038
1794–IF2XOF2I 24V DC 2 Input/2 Output Isolated Analog
Module 1794-IN039

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 11
Preface
1794-IE12 24V DC 12 Input Analog Module 1794-IN106
1794-OE12 24V DC 12 Output Analog Module
1794-IE8XOE4 24V DC 8 Input/4 Output Analog Module
1794-IE8H 24V DC 8 HART Input Module 1794-IN108 1794-UM063
1794-OE8H 24V DC 8 HART Output Module 1794-IN109
1794–IR8 24V DC 8 RTD Input Analog Module 1794-IN021 1794–6.5.4
1794–IT8 24V DC 8 Thermocouple Input Module 1794–6.5.7
1794–IRT8 24V DC 8 Thermocouple/RTD Input Module 1794-IN050 1794–6.5.12
1794–IJ2 24V DC 2 Channel Frequency Input Module 1794-IN049 1794–6.5.11
1794–ID2 24V DC 2 Channel Frequency Input Module 1794-IN063 1794–6.5.15
1794–IP4 24V DC 2 Channel Pulse Counter Module 1794-IN064 1794–6.5.16
1794–VHSC 24V DC Very High Speed Counter Module 1794IN067 1794–6.5.10
1794–IC16 48V DC 16 Sink Input Module 1794-IN105
1794–OC16 48V DC 16 Source Output Module
1794–IA8 120V AC 8 Input Module 1794-IN102
1794–IA8I 120V AC Isolated 8 Input Module
1794–IA16 120V AC 16 Input Module
1794–OA8 120V AC 8 Output Module 1794-IN103
1794–OA8I 120V AC Isolated 8 Output Module
1794–OA16 120V AC 16 Output Module
1794–IM8 220V AC 8 Input Module 1794-IN104
1794–OM8 220V AC 8 Output Module
Catalog
Number Voltage Description Publications
Installation
Instructions User Manual

12 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Preface
1794–TB2 Cage Clamp Terminal Base 1794-IN092
1794–TB3 Cage Clamp Terminal Base
1794–TB3S Spring Clamp Terminal Base Unit
1794–TB3T Temperature Terminal Base Unit
1794–TB3TS Spring Clamp Temperature Base Unit
1794–TB3G Terminal Base Unit
1794–TB3GS Spring Clamp Terminal Base Unit
1794–TB32 Cage Clamp Terminal Base Unit
1794–TB32S Spring Clamp Terminal Base Unit
1794–TBN Terminal Base Unit
1794–TBNF Fused Terminal Base Unit
1794-TB3GK Conformally Coated Terminal Base Unit
1794-TB3K Conformally Coated Terminal Base Unit
1794-TBNFK Conformally Coated Fused Terminal
Base Unit
1794-TB37DS,
-TB62DS,
TB37EXD4VM8,
-TB37EXD4CM8,
-TB62EXD4X15
D-Shell Terminal Base Units and
Distribution Boards 1794-IN107
1794–CE1, –CE3 Extender Cables 1794–5.12
1794–NM1 Mounting Kit 1794–5.13
1794–PS13 24V DC Power Supply 1794-IN069
1794–PS3 24V DC Power Supply
FLEX Ex
1797–IBN16 See note 16 NAMUR Digital Input Module 1797-5.7
1797–OB4D See note 4 NI, Ex Source Digital Output Module 1797-5.6
1797–IE8, -IE8H See note 8 Input Module 1797-5.5
1797–IE8NF See note 8 Selectable Filter Analog Input Module 1797-5.31
1797–OE8, -OE8H See note Analog 8 Output Module 1797-5.3
1797–IRT8 See note 8 Thermocouple/RTD Input Module 1797-5.4
1797–IJ2 See note 2 Channel Frequency Input Module 1797-5.9
1797–TB3
1797–TB3S Cage Clamp Terminal Base Spring Clamp Terminal Base 1797-5.1 1797-5.2
Catalog
Number Voltage Description Publications
Installation
Instructions User Manual

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 13
Preface
For more information on DeviceNet® modules in Logix 5000™ systems, see
DeviceNet Network Configuration User Manual, publication DNET-UM004.
For more information on ControlNet® modules in Logix 5000 systems, see
ControlNet Network Configuration User Manual, publication CNET-UM001.
For more information on EtherNet/IP™ modules in Logix 5000 systems, see
EtherNet/IP Network Devices User Manual, publication ENET-UM006.
1797–BIC See note I.S. Bus Isolator 1797-5.13
1797–CEC See note FLEX Ex Bus Connector 1797-5.13
Note: Intrinsically Safe Voltage
Catalog
Number Voltage Description Publications
Installation
Instructions User Manual

14 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Preface
Notes:

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 15
Chapter 1
1794 FLEX I/O Diagnostic Digital Modules
Overview
Introduction
In this chapter, you will learn about the diagnostic input module, cat. no.
1794-IB16D, and the diagnostic output module, cat. no. 1794-OB16D.
General Description
This chapter contains an overview of the FLEX™ I/O diagnostic digital modules,
the 1794-IB16D input module and 1794-OB16D output module. You can use
the FLEX I/O diagnostic modules to help diagnose problems with input and
output field devices, I/O wiring and the user power supply. Additionally, these
modules can reduce installation startup time and help minimize time to find and
fix failures.
This chapter explains how to use the FLEX I/O diagnostic modules to help
detect the following types of faults:
• Open input or output field devices
• Open input or output wiring
•Shortedoutputfielddevices
•Shortedinputoroutputwiring
• Reversed polarity of user supply wiring
• Open user supply wiring or failed user supply (using one diagnostic input
channel)
Topic See Page
General Description 15
Install Your Digital Input or Output Module 18

16 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Chapter 1 1794 FLEX I/O Diagnostic Digital Modules Overview
Network Compatibility
You can use the diagnostic modules with ControlNet, DeviceNet, EtherNet/IP,
or remote I/O networks.
1794-IB16D Diagnostic Input Module Compatibility
The 1794-IB16D diagnostic input module interfaces to sensing devices and
detects whether they are on or off. The diagnostic input module converts DC
signals from user devices to the appropriate logic level for use in the FLEX I/O
system. Typical input devices include these types of switches.
• Proximity switches
• Limit switches
• Photoelectric switches
• Selector switches
• Float switches
• Push button switches
When designing a system using a FLEX I/O diagnostic input module, you must
consider:
• the voltage necessary for your application.
• current leakage through the input devices.
• the amount of current consumed by the input devices.
• whether the application requires sinking or sourcing devices.
Usage Limitations
Network 1794-IB16D 1794-OB16D
Remote I/O Compatible with 1794-ASB
series E (or higher) and
1794-ASB2 series D (or higher)
remote I/O adapters.
Compatible with 1794-ASB
series D (or higher) and
1794-ASB2 series C (or higher)
remote I/O adapters.
DeviceNet No limitations or constraints.
ControlNet Direct connection only. Direct or rack connections.
EtherNet/IP Direct connection only. Direct or rack connections.

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 17
1794 FLEX I/O Diagnostic Digital Modules Overview Chapter 1
Capabilities of the 1794-IB16D include:
• 61131-2 Type 3 compatible sinking inputs.
• interface with PNP sourcing sensors.
• 10…31.2V DC operating range.
• provides up to 50 mA to power an attached sensor.
• detects for an open wire condition down to 50 A.
You need a dummy resistor to mask the channel diagnostic function for each
unused sensor port. Used sensor ports must have a 50 A minimum current draw
with the input field device in both the on- and off-state.
1794-OB16D Diagnostic Output Module Compatibility
You can use FLEX I/O diagnostic output modules to drive various output
devices. Typical output devices include the following.
•Relays
• Solenoids
•Contactors
•Indicators
• Small motor starters
When you design a system using FLEX I/O diagnostic output modules, you must
consider:
• The output must supply the necessary surge and continuous current for the
output device being used.
• When sizing output loads, check the documentation that is supplied with
the output device for the surge and continuous current needed to operate
the device.
Capabilities of the 1794-OB16D diagnostic output module include:
• sourcing style outputs for loads that are connected to common.
• 10…31.2V DC operating range.
• provides continuous current of 0.5 A maximum (8 A per module),
2.0 mA minimum per output.
• capable of 2 A surge for 50 ms, repeatable every 2 s.
• protection from short circuit and overload.
You need a dummy resistor to mask the channel diagnostic function for each
unused output channel.

18 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Chapter 1 1794 FLEX I/O Diagnostic Digital Modules Overview
Install Your Digital Input or
Output Module
To install a digital diagnostic module, follow these steps:
✓Installation Step
❑ 1. Mount the terminal base unit
See installation instructions 1794-IN096.
❑ 2. Install the module in the terminal base unit
See installation instructions 1794-IN096.
❑ 3. Connect the wiring to the terminal base unit
See installation instructions 1794-IN096.

Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 19
1794 FLEX I/O Diagnostic Digital Modules Overview Chapter 1
1794-TB32 and 1794-TB32S Terminal Base Wiring for the 1794-IB16D
Wiring for 1794-IB16D (use with 1794-TB32 or 1794-TB32S Terminal Base Units)
Input Input
Terminal Sensor Power Terminal Common1Supply
IN 00 A-0 B-17 -V common
connected to
terminals 36, 38,
40, 42, 44, 46, 48,
and 50
+V2 connected
to terminals 43,
45, 47, and 49
(+V1 terminals
35, 37, 39, and
41 are not used).
IN 01 A-1 B-18
IN 02 A-2 B-19
IN 03 A-3 B-20
IN 04 A-4 B-21
IN 05 A-5 B-22
IN 06 A-6 B-23
IN 07 A-7 B-24
IN 08 A-8 B-25
IN 09 A-9 B-26
IN 10 A-10 B-27
IN 11 A-11 B-28
IN 12 A-12 B-29
IN 13 A-13 B-30
IN 14 A-14 B-31
IN 15 A-15 B-32
+V2 DC
power Power terminals 43, 45, 47, and 49 (power terminals are internally connected together in the module)
COM DC
Return Common terminals 36, 38, 40, 42, 44, 46, 48, and 50 (common terminals COM 1 and COM 2 are internally connected together in the module)
(1)3-wire devices only. 2-wire devices use input and sensor power terminals; 3-wire
devices use input, sensor power and common terminals.
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
NC
Inputs Channels 0-15
Sensor Power Terminals for Channels 0-15
+V1 COM1 +V1 COM1 +V1 COM1 +V1 COM1 +V2 COM2 +V2 COM2 +V2 COM2 +V2 COM2 NC
NC NC
A
B
C
Sensor Common and User Power Common:
Terminals C-36, C-38, C-40, C-42, C-44, C-46, C-48 and C-50.
User power (+) Voltage: Terminals C-43, C-45, C-47 and C-49.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
COM1 and COM2 are connected together in the module.
+V1 Terminals C-35, C-37, C-39, and C-41 are not used

20 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Chapter 1 1794 FLEX I/O Diagnostic Digital Modules Overview
1794-TB2, -TB3, and -TB3S Terminal Base Wiring for the 1794-OB16D
Wiring Connections for the 1794-OB16D (use with 1794-TB2, 1794-TB3, or 1794-TB3S
Terminal Base Units).
Outputs Output Terminal Common Terminal
Output 00 A-0 B-17
Output 01 A-1 B-18
Output 02 A-2 B-19
Output 03 A-3 B-20
Output 04 A-4 B-21
Output 05 A-5 B-22
Output 06 A-6 B-23
Output 07 A-7 B-24
Output 08 A-8 B-25
Output 09 A-9 B-26
Output 10 A-10 B-27
Output 11 A-11 B-28
Output 12 A-12 B-29
Output 13 A-13 B-30
Output 14 A-14 B-31
Output 15 A-15 B-32
+V DC C-34 and C-51 (1794-TB2) (Power Terminals are
internally connected in the terminal base unit.
C-34…C-51 (1794-TB3, 1794-TB3S) (Power terminals
are internally connected in the terminal base unit.
Common B-16…B-33 (Common terminals are internally
connected in the terminal base unit.
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
Outputs
Commons
(1794-TB3 shown)
-V (Supply Common) = Terminals B-16 through B-33.
+V (Supply +Voltage In) = Terminals C-34 through C-51.
-V
Voltage
In +V Voltage
Out +V
Voltage
A
B
C
(Use B-33 and C-51 for daisy-chaining to next terminal base unit.)
Common -V
Common
Terminals 35 through 50 not available on 1794-TB2
16