Allen-Bradley 1718 Ex I/O User manual

1718 Ex I/O
Catalog Numbers 1718-AENTR, 1718-IJ, 1718-OB2, 1718-OB2L, 1718-IBN8, 1718-IBN8B, 1718-IT4B, 1718-IR4B, 1718-IF4HB,
1718-CF4H, 1718-PSDC, 1718-A20, 1718-A10, 1718-CBL65, 1718-CBL3, 1718-ARM
User Manual
Original Instructions

Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are
required to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may
be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
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.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
vole 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).

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 3
Table of Contents
Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table of Contents
Preface
Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Purpose of This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter Preface
Product Specifications
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1718 Ex I/O Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1718 Ex I/O Components Overview . . . . . . . . . . . . . . . . . . . . . . . . . 8
Field Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Plastic enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Stainless steel enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Enclosure Material Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Backplanes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Design and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Design and Dimensions of the Modules . . . . . . . . . . . . . . . . . . . . . 14
Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Bus Termination Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Placeholder Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Cordsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Chapter Preface
Commissioning
Testing physical connection right to the end of the segment . . . 23
Testing physical 1718 Ex I/O unit connection . . . . . . . . . . . . . . . 24
Configuration of an RS-485-Based Bus System. . . . . . . . . . . . . . . 24
Startup Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Chapter Preface
Operation Appendix A
Troubleshoot Your Module
Communication errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Appendix B
Technical Data
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Ambient Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Table of Contents
Appendix C
Additional HART Protocol
Information
Message Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Master-slave Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Multiple Master Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Transaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Response Code and
Field Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
HART PV, SV, TV, and FV Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Appendix D
Engineering Unit Code Numbers
Code Number Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 5
Preface
Read this preface to familiarize yourself with the rest of the manual. It provides
information concerning:
•who should use this manual
•the purpose of this manual
•related documentation
•supporting information
Who Should Use This Manual This manual is intended for trained and qualified personnel who are responsible
for mounting, installation, commissioning, operation, maintenance, and
disassembly of 1718 Ex I/O.
For more information, see Target Group, Personnel on page 11.
Purpose of This Manual This manual provides information and describes the procedures that are used to
install, wire, troubleshoot, and operate 1718 Ex I/O.
Additional Resources These resources contain information about related products from
Rockwell Automation.
You can view or download publications at
http://www.rockwellautomation.com/literature/. For Release Notes and other
publications specific to your module, search the catalog number of the module.
To order paper copies of technical documentation, contact your local Allen-
Bradley distributor or Rockwell Automation sales representative.
Resource Description
1718 Ex I/O Installation Instructions,
publication 1718-IN001
Describes how to install and wire the 1718 Ex I/O input
and output modules
1718 Ex I/O Technical Data,
publication 1718-TD001
Provides specifications, wiring diagrams, and module
block diagrams for 1719 Ex I/O
1718 Certification Bulletin, publication 1718-CT001 Provides 1718 Ex I/O certification information and links to
control drawings.
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
Provides general guidelines for installing a
Rockwell Automation industrial system.

6Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Preface
Notes:

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 7
Chapter 1
Product Specifications
Introduction Remote I/O systems, consisting of I/O modules, gateways, bus termination
modules, power supplies, and a backplane, form the interface for signals to be
transmitted from the explosion hazardous area (Ex area), to the safe area (non-
hazardous area). With appropriate surrounding enclosures, remote I/O systems
can be installed in Gas-Ex areas of Zone 1. Using remote I/O, a wide range of
digital and analog sensors and actuators can be connected to process control
systems over a fieldbus. Specific measures need to be taken to disconnect I/O
modules with Ex-e front connectors during ongoing operation. To do so,
observe the safety notices in this manual. The gateway is the interface between
the I/O modules on the backplane and the process control system. Power
supplies are used to power the I/O modules and adapter/gateway.
All components of the FB remote I/O with Ex-q protection meet the FB
concept. This simplifies the evaluation of modules from an explosion
protection point of view.
This manual sets out how to work with the hardware. Refer to the software
manual for the gateway and the I/O modules for information on the
configuration of the gateway and the I/O modules.
Topic Page
Introduction 7
1718 Ex I/O Components 8
Field Units 9
Backplanes 10
I/O Modules 13
Adapter 15
Bus Termination Modules 16
Power Supply Module 16
Placeholder Module 16
Accessories 16

8Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Chapter 1 Product Specifications
Table 1 - 1718 Ex I/O Modules
1718 Ex I/O Components 1718 Ex I/O Components Overview
See the following graphic and table for the descriptions of different 1718 Ex I/O components:
Figure 1 - 1718 Ex I/O Components Overview
Type Catalog Number Description
Communication Adapter 1718-AENTR Ex I/O EtherNet/IP Adapter
Digital Input
1718-IJ Ex I/O Frequency Counter
1718-IBN8B Ex I/O 8 Point Digital Input NAMURWide
1718-IBN8 Ex I/O 8 Point Digital Input NAMUR
Analog Input
1718-IF4HB Ex I/O 4 Channel HART Analog InputWide
1718-IR4B Ex I/O 4 Channel RTD Input
1718-IT4B Ex I/O 4 Channel Thermocouple Input
Configurable
Analog Input/Output 1718-CF4H Ex I/O 4 Channel HART Analog Configurable
Digital Output 1718-OB2 Ex I/O 2 Point Digital Output 23V
1718-OB2L Ex I/O 2 Point Digital Output 16.5V
Power Supply 171-PSDC Ex I/O DC Power Supply
Backplane 1718-A20 Ex I/O 20 Slot Chassis
1718-A10 Ex I/O 10 Slot Chassis
Connection Cable 1718-CBL65 Ex I/O Chassis Extension Cable 0.65 m
1718-CBL3 Ex I/O Chassis Extension Cable 3 m
Placeholder 1718-ARM Ex I/O Empty Slot Cover
123 4 5
678
9

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 9
Product Specifications Chapter 1
Table 2 - 1718 Ex I/O Components Overview
Field Units Field units (surrounding enclosures) serve to protect all electronic components
against environmental influences and are an integral part of explosion
protection. The enclosures are made of glass fiber reinforced polyester or
stainless steel and are available in various versions. The surrounding enclosures
contain backplanes for the connection of modules. The modular concept
allows multiple surrounding enclosures to be flanged together to create the
required expansion level. Each surrounding enclosure contains Ex-e terminals
for power and communication lines. For safety, these are individually equipped
with protective covers (IP30) and touch protection.
The surrounding enclosures are equipped with a rating plate listing all safety-
relevant information, e.g., type of ignition protection, temperature class,
permissible ambient temperature and permissible power.
Plastic enclosure
Glass fiber reinforced polyester offers a high level of mechanical protection for
both onshore and offshore plants.
Figure 2 - Field unit with plastic enclosure partially without cover and modules
Description Description
1 Field Unit (Surrounding Enclosure) 6 Backplane
2 Power supply 7 Cable gland for field lines
3Bus termination module 8 Cable gland for power supply and bus cables
4 Adapter 9 Ex-e-terminals and IP30 cover
5I/Omodule

10 Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Chapter 1 Product Specifications
Stainless steel enclosure
The stainless steel enclosure ensures a high level of corrosion resistance for
onshore and offshore plants.
Figure 3 - Field unit with stainless steel enclosure without modules
Enclosure Material Availability
Modular plastic and stainless steel enclosures are available in various sizes and
designs, and custom solutions are also available. Depending on the version, the
device units comprise base, redundancy, and expansion backplanes installed in
the corresponding surrounding enclosures.
Figure 4 - Available field units
Backplanes Function
The modules are plugged into the backplane, which in turn is installed in a
plastic or stainless steel enclosure. The backplane supplies the modules with
energy and provides internal wiring.
Any I/O module can be inserted into any I/O slot, enabling a mixture of I/O
functions in one field unit. Power supplies, adapters/gateways, and bus
Catalog Number Type Max. number of slots Material
Field unit Redundant field unit Stainless steel Polyester
FB9210-PF0-G
FB9210-S60-G
FB9220-PF0-G
FB9220-S60-G
FB9240-PF0-G
FB9240-S70-G

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 11
Product Specifications Chapter 1
termination modules are installed in their reserved slots. These are
mechanically coded to avoid confusion.
Figure 5 - Overview of backplanes
Design and Dimensions
The following backplanes are operated as a base backplane and extension
backplane. Connect the two backplanes using the backplane cordset.
1718-A20
• Redundant configuration with slots for 2 gateways/adapters, 2 bus
termination modules, 2 power supplies
• Slots for max. 20 narrow or 10 wide I/O modules
• For PROFIBUS DP, MODBUS RTU, MODBUS TCP, Ethernet
WARNING: Risk of death as a result of using a damaged or tampered
backplane.
Using a defective or tampered backplane means that explosion protection can
no longer be guaranteed.
• Do not use a damaged backplane.
• The backplane must not be tampered with.
• In the event of a fault, the backplane must always be replaced with an
original backplane from Rockwell Automation.
Catalog Number Description
1718-A20 Universal backplane
20 slots
Redundant: adapter and power supply
1718-A10 Universal backplane
10 slots
Redundant: adapter and power supply

12 Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Chapter 1 Product Specifications
Figure 6 - 1718-A20 Dimensions
Table 3 - 1718-A20 Dimension Descriptions
1718-A10
• Redundant configuration with slots for 2 adapters, 2 bus termination
modules, 2 power supplies
• Slots for max. 10 narrow or 5 wide I/O modules
• For PROFIBUS DP, MODBUS RTU, MODBUS TCP, Ethernet
Number Description
1 Power supply
2 Bus termination module when used as a base backplane
Empty slot when used as an extension backplane
3 Adapter when used as a base backplane
Empty slot when used as an extension backplane
4 Slots for 20 narrow or 10 wide I/O modules
5 Redundant power supply
6 Bus termination module for redundant gateway/redundant adapter when used as a base backplane
Empty slot when used as an extension backplane
7 Redundant adapter when used as a base backplane
Empty slot when used as an extension backplane
511
212 85
1 2 3
5 6 7
12345678910
11 12 13 14 15 16 17 18 19 20
4

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 13
Product Specifications Chapter 1
Figure 7 - 1718-A10 Dimensions
Table 4 - 1718-A10 Dimension Descriptions
I/O Modules I/O modules are used to modify signals between field devices in explosion-
hazardous areas and controllers or control systems in the safe area. The slots for
the I/O modules on the backplane are equal, so you can use I/O modules with
different functions next to each other. The various I/O modules can be
plugged in.
The integrated removal device allows you to quickly install and safely replace
modules during ongoing operation if the module has intrinsically safe front
connections or no front connections.
The status of each channel is displayed using an LED. This gives your
technician clear information about the status of the field device directly on the
device itself. For more information about the status LEDs, please refer to the
respective datasheets for the modules.
Number Description
1Powersupply
2 Bus termination module when used as a base backplane.
Empty slot when used as an extension backplane
3 Gateway when used as a base backplane
Empty slot when used as an extension backplane
4 Slots for 10 narrow or 5 wide I/O modules
5 Redundant power supply
6 Bus termination module for redundant gateway, when used as base backplane
Empty slot when used as extension backplane
7 Redundant adapter when used as a base backplane
Empty slot when used as an extension backplane
85
511
212
1 2 3
5 6 7
12345678910
4

14 Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Chapter 1 Product Specifications
The sockets on the discharge side of the module offer 1, 2, 4 and 8 channels to
connect Ex field devices. Using the single-channel modules for controlling
valves, including feedback, two additional binary input signals can be
transmitted from the field. The portfolio is supplemented with 2-channel
modules with shutdown input for emergency shutdown.
When modules are replaced, the new module automatically adopts the settings
of its predecessor. This prevents errors when replacing modules.
The 4-channel universal module processes analog inputs and outputs
depending on the setting. Each of the four channels can be configured
independently of the others.
Figure 8 - 1718 Ex I/O Module
Design and Dimensions of the Modules
The FB remote I/O system is designed in such a way that each I/O module can
be connected to the I/O slot it requires on the backplane. The slots on the
backplane are limited. Depending on the size, for example, a base backplane
can accommodate max. 24 narrow or 12 wide I/O modules.
Power supplies, adapters, and bus termination modules are assigned to fixed
slots. To avoid confusion, these are mechanically coded. Adapters and power
supplies are always wide modules. Bus termination modules are
narrow modules.
Both the I/O modules and the adapters and power supplies are equipped with
LEDs on the front that display the device status.
The I/O modules have connections on the front to which the relevant field
devices are connected. On the back of the I/O modules there is a coding pin

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 15
Product Specifications Chapter 1
that prevents an I/O module from being accidentally inserted into a slot that is
intended for an adapter or a power supply.
Figure 9 - Narrow Modules
Figure 10 - Wide modules
Adapter Adapters form the interface between the I/O modules and the process control
system. The adapter converts the protocol of the bus integrated in the
backplane to the protocol of the higher-level bus system.
Another adapter variant is the gateway. This is described in more detail below.
The gateway (check if there’s a gateway module) can be operated directly via
the touch screen on the front, meaning it can be configured directly in the
field. In addition, the device status is displayed using the four LEDs below the
touch screen.
WARNING: Explosion hazard as a result of removing coding pins!
Removing the coding pins means explosion protection can no longer be
guaranteed.
Never remove the coding pins from the module.
139,8
28,5
106,6
139,8
57,5
106,6

16 Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Chapter 1 Product Specifications
The two Ethernet interfaces on the front connect the device to the Ethernet
network.
Bus Termination Modules Bus termination modules prevent the reflection of signals at the end of the bus
line. A bus termination module is required in each final unit of a bus line.
(Guess we dont have a ROK version of this module - add the figure if we do
support).
Power Supply Module The power supplies provide power to all components of the remote I/O. The
slots for adapters are mechanically coded on the backplane and marked
accordingly. (Provide product photo)
Placeholder Module Placeholder modules keep non-wired field circuits in position. This module
has no electrical connection. (Provide product photo)
Accessories Field Wiring
The following accessories are available for field wiring.
Terminal Blocks
Terminal blocks are wired to the field devices, attached to the front sockets of
the I/O modules, and tightened using the side screws. Terminal blocks can
come in the form of screw terminals, front screw terminals, or spring terminals.
Use blue terminal blocks for intrinsically safe circuits.
WARNING: Explosion hazard in Zone 1.
When pulling out an M12 connector in Zone 1, a spark may form that ignites an
explosive mixture.
• Do not pull out M12 connectors in potentially explosive atmospheres.
• Use only original Pepperl+Fuchs cables. (should we write this as cables from
the manufacturer Rockwell Automation?)
WARNING: Property damage due to incorrect terminal assignment.
Incorrect terminal assignment and incorrectly positioned plug-in jumpers can
cause damage to the gateway.
• Ensure that the terminal assignment of the gateway is correct. Refer to the
backplane information in the Technical Data, 1718-TD001. Terminals 39 and
40 must be inserted when using the Ex-q gateway.
• Ensure that the plug-in jumper is correctly positioned. Refer to the
backplane information in the Technical Data, 1718-TD001.

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 17
Product Specifications Chapter 1
Use black terminal blocks for non-intrinsically safe circuits that comply with
Ex e type of protection.
Table 5 - Available Terminal Blocks
Figure 11 - Side Screw Terminal Dimensions
Figure 12 - Front Screw terminal Dimensions
Figure 13 - Spring Terminal Dimensions
Protective covers
Protective covers (IP30) are used to protect the wiring to the terminal blocks,
so that no bare, conductive parts are exposed. Use black protective covers for
non-intrinsically safe circuits that comply with type of protection Ex e.
Type Color Catalog Numbers
(Side) Screw terminals Blue LB9107A, LB9113A, LB9124A, LB9125A
Front screw terminals Blue LB9117A, LB9118A, LB9119A, LB9127A
Spring terminals Blue LB9107P, LB9115A, LB9116A, LB9126A, (LB9130A)
Black LB9109.E.6.1, LB9109.E.8.1, LB9109.E.8.2
TIP The LB9130A spring terminal for the 1718-IBN8 I/O module is only inserted
and not screwed in.
15.3 L
11.1
L = 33.3 mm for 6-pin terminals and 40.9 mm for 8-pin terminals
21.7 L
12.3
L = 33.3 mm for 6-pin terminals and 40.9 mm for 8-pin terminals
20.8 L
12.4
19.2
11.75
20.6
L = 33.3 mm for 6-pin terminals and 40.9 mm for 8-pin terminals

18 Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Chapter 1 Product Specifications
The catalog numbers for protective covers are LB9107.E.6, LB9107.E.8.
Figure 14 - Protective Cover Dimensions
Cold junctions
Cold junctions have a prewired Pt100 thermocouple on terminal openings 1
and 2 for numerically correcting the thermoelectric voltage. Cold junctions are
available exclusively in blue. Use blue cold junctions for intrinsically
safe circuits.
Table 6 - Cold Junction Catalog Numbers
Figure 15 - Cold Junction Dimensions
Figure 16 - Cold Junction with Protective Cover Dimensions
Coding pins
Coding pins provide a unique assignment between I/O modules and terminal
blocks or the associated field devices. To do this, the coding pins are pushed
into the grooves provided in the front sockets of the I/O modules. This
Catalog Number Color Description
LB9112A Blue Cold junctions
LB9111A Cold junctions with a protective cover
17 L
16
16.1 L
11.1
1
2
L = 33.3 mm for 6-pin terminals
12
14.5L
39
(45.6)
6.6
L = 33.3 mm for 6-pin terminals

Rockwell Automation Publication 1718-UM001A-EN-E - December 2019 19
Product Specifications Chapter 1
prevents terminal blocks from being accidentally plugged into another I/O
module.
Figure 17 - KF-CP coding pins
Watchdog plugs
The watchdog plug is used with digital outputs with a feedback input
(FB2201B - FB2213E). The watchdog plug sends the output signal from the I/
O module back to its input channel, making it possible to check the function of
the I/O module, as well as the communication between the process control
system and the I/O module.
Figure 18 - Block diagram for the LB9180
Resistor network
Most I/O modules have a line fault detection function that can recognize a
lead breakage or a short circuit.
If binary I/O modules are used, for example with a mechanical contact, an
additional resistor network must be installed to ensure that the line fault
detection function can work correctly. Using the additional resistor network,
the electronics can distinguish between a closed switch and a short circuit.
To do this, the resistor network must be positioned directly on the field device.
WARNING: Risk of confusing device connections.
When coding the front sockets of the I/O modules, ensure that the codes are
mutually exclusive. Otherwise there is the danger of incorrect mapping between
devices and circuits in explosion-hazardous areas.
LB9180
1 kΩ
-5
-6
4
2,4 kΩ
+
-
+
+
3
2
1

20 Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
Chapter 1 Product Specifications
Figure 19 - Dimensions of the F-NR2-Ex1 resistor network
Figure 20 - Block diagram of the F-NR2-Ex1 resistor network
Cordsets
Cordset for backplane
The following table shows an overview of possible cordsets. Cordsets establish
a local connection between a base backplane and an extension backplane. If a
base backplane is extended with an extension backplane with additional I/O
modules and power supplies, the backplane cordset ensures data exchange
between the adapters on the base backplane and the I/O modules on the
extension backplane. The length of the backplane cordset is up to 3 m.
Table 7 - Overview of Cordsets
Cordset for Gateways
There are two types of cordsets for gateways. One with a wired connection in
Ex-i protection and one with M12 threaded plugs in Ex-e protection. The
gateway cordset provides a local connection between two gateways. If two
WARNING: Explosion hazard through use of incorrect cordset.
The use of incorrect cables in a potentially explosive atmosphere can create
sparks that can ignite the surrounding atmosphere.
Catalog Number Description
FB9272-065 Cordset, length 0.65 m
FB9272-300 Cordset, length 3 m
27
35150
Ø15.5
Zone 1, 2
F-NR2-Ex1
10 kΩ
1.5 kΩ
2-
1+
-
+