Rockwell Automation ICSTT-RM280N-EN-P User manual

ICSTT-RM280N-EN-P (PD-T8451) Trusted
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14
Trusted TMR 24 Vdc Digital Output Module – 40
Channel
Product Overview
The Trusted® TMR 24 Vdc Digital Output Module interfaces to 40 field devices. Triplicated
diagnostic tests are performed throughout the Module including measurements for current, and
voltage on each portion of the voted output channel. Tests are also performed for stuck on and
stuck off failures. Fault tolerance is achieved through a Triple Modular Redundant (TMR)
architecture within the Module for each of the 40 output channels.
Automatic line monitoring of the field device is provided. This feature enables the Module to detect
both open and short circuit failures in field wiring and load devices.
The Module provides on-board Sequence of Events (SOE) reporting with a resolution of 1 ms. An
output change of state triggers an SOE entry. Output states are automatically determined by
voltage and current measurements on-board the Module.
This Module is not approved for direct connection to hazardous areas and should be used in
conjunction with Intrinsic Safety Barrier devices.
Features
•40 Triple Modular Redundant (TMR) output points per Module.
•Comprehensive, automatic diagnostics and self-test.
•Automatic line monitoring per point to detect open circuit and short circuit field wiring and
load faults.
•2500 V impulse withstand opto/galvanic isolation barrier.
•Automatic over-current protection (per channel), no external fuses required.
•On-board Sequence of Events (SOE) reporting with 1 ms resolution.
•Module can be hot-replaced on-line using dedicated Companion (adjacent) Slot or SmartSlot
(one spare slot for many Modules) configurations.

Trusted ICSTT-RM280N-EN-P
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14
•Front Panel output status Light Emitting Diodes (LEDs) for each point indicate output status
and field wiring faults.
•Front Panel Module status LEDs indicate Module health and operational mode (Active,
Standby, Educated).
•TϋV Certified IEC 61508 SIL 3.
•Outputs are powered in isolated groups of eight. Each such group is a Power Group (PG).

Trusted TMR 24Vdc Digital Output Module – 40 Channel PREFACE
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 i
PREFACE
In no event will Rockwell Automation be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment. The examples given in this manual are
included solely for illustrative purposes. Because of the many variables and requirements related to
any particular installation, Rockwell Automation does not assume responsibility or reliability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, with respect to use of information, circuits,
equipment, or software described in this manual.
Allen-Bradley, LISTEN. THINK. SOLVE., Rockwell Automation, TechConnect, and Trusted are
trademarks of Rockwell Automation, Inc.
All trademarks are acknowledged.
DISCLAIMER
It is not intended that the information in this publication covers every possible detail about the
construction, operation, or maintenance of a control system installation. You should also refer to
your own local (or supplied) system safety manual, installation and operator/maintenance manuals.
REVISION AND UPDATING POLICY
This document is based on information available at the time of its publication. The document
contents are subject to change from time to time. The latest versions of the manuals are available at
the Rockwell Automation Literature Library under "Product Information" information "Critical
Process Control & Safety Systems".
TRUSTED RELEASE
This technical manual was updated for Trusted Release 4.0.
LATEST PRODUCT INFORMATION
For the latest information about this product review the Product Notifications and Technical Notes
issued by technical support. Product Notifications and product support are available at the Rockwell
Automation Support Centre at
http://rockwellautomation.custhelp.com
At the Search Knowledgebase tab select the option "By Product" then scroll down and select the
Trusted product.
Some of the Answer ID’s in the Knowledge Base require a TechConnect℠Support Contract. For more
information about TechConnect Support Contract Access Level and Features, click on the following
link:
https://rockwellautomation.custhelp.com/app/answers/detail/a_id/50871

PREFACE Trusted TMR 24Vdc Digital Output Module – 40 Channel
ii Issue 14 Rockwell Automation Publication ICSTT-RM280N-EN-P
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Trusted TMR 24Vdc Digital Output Module – 40 Channel PREFACE
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 iii
SCOPE
This manual specifies the maintenance requirements and describes the procedures to assist
troubleshooting and maintenance of a Trusted system.
WHO SHOULD USE THIS MANUAL
This manual is for plant maintenance personnel who are experienced in the operation and
maintenance of electronic equipment and are trained to work with safety systems.
SYMBOLS
In this manual we will use these notices to tell you about safety considerations.
SHOCK HAZARD: Identifies an electrical shock hazard. If a warning label is fitted, it
can be on or inside the equipment.
WARNING: Identifies information about practices or circumstances that can cause
an explosion in a hazardous environment, which can cause injury or death,
property damage or economic loss.
ATTENTION: Identifies information about practices or circumstances that can cause
injury or death.
CAUTION: Identifies information about practices or circumstances that can cause
property damage or economic loss.
BURN HAZARD: Identifies where a surface can reach dangerous temperatures. If a
warning label is fitted, it can be on or inside the equipment.
This symbol identifies items which must be thought about and put in place when
designing and assembling a Trusted controller for use in a Safety Instrumented
Function (SIF). It appears extensively in the Trusted Safety Manual.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.
NOTE Provides key information about the product or service.
TIP Tips give helpful information about using or setting up the equipment.

PREFACE Trusted TMR 24Vdc Digital Output Module – 40 Channel
iv Issue 14 Rockwell Automation Publication ICSTT-RM280N-EN-P
WARNINGS AND CAUTIONS
WARNING: EXPLOSION RISK
Do not connect or disconnect equipment while the circuit is live or unless the area is
known to be free of ignitable concentrations or equivalent
AVERTISSEMENT - RISQUE D’EXPLOSION
Ne pas connecter ou déconnecter l’équipement alors qu’il est sous tension, sauf si
l’environnement est exempt de concentrations inflammables ou équivalente
MAINTENANCE
Maintenance must be carried out only by qualified personnel. Failure to follow these
instructions may result in personal injury.
CAUTION: RADIO FREQUENCY INTERFERENCE
Most electronic equipment is influenced by Radio Frequency Interference. Caution
should be exercised with regard to the use of portable communications equipment
around such equipment. Signs should be posted in the vicinity of the equipment
cautioning against the use of portable communications equipment.
CAUTION:
The module PCBs contain static sensitive components. Static handling precautions
must be observed. DO NOT touch exposed connector pins or attempt to dismantle a
module.

Trusted TMR 24Vdc Digital Output Module – 40 Channel PREFACE
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 v
ISSUE RECORD
Issue Date Comments
8July 05 Reformat
Text Editing
9 Aug 06 Channel States
10 Dec 06 Weights & Dims
11 Nov 07 STATE descriptions
12 Apr 10 Rack 7 table minor change
13Aug 15 Rebranded and reformatted with correction to Relative Humidity Range
and Operating Temperature in the Specification Section, also correction
to any typographical errors
14 Jan 19 Updated Specifications section and main text to a more consistent
format.
Updated Front Panel section to updated product design.
Updated to display Rockwell Automation publication numbers.
Added trademarks statement.

PREFACE Trusted TMR 24Vdc Digital Output Module – 40 Channel
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Trusted TMR 24Vdc Digital Output Module – 40 Channel Table of Contents
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 1
Table of Contents
1. Description ............................................................................................................ 3
1.1. Field Termination Unit (FTU)...................................................................................................... 4
1.2. Field Interface Unit (FIU)............................................................................................................ 4
1.3. Host Interface Unit (HIU) ........................................................................................................... 5
1.4. Front Panel Unit (FPU) ............................................................................................................... 6
1.5. Line Monitoring and Output States ........................................................................................... 6
1.6. Housekeeping............................................................................................................................. 6
1.7. Fault Detection/Testing ............................................................................................................. 6
1.8. Sequence of Events Characteristics ........................................................................................... 7
1.9. Output Switch Structure ............................................................................................................ 8
1.9.1. Switch Diagnostics.............................................................................................................. 9
1.9.2. Short Circuit Protection.................................................................................................... 10
1.9.3. Group Fail Safe Switches .................................................................................................. 10
2. Installation.......................................................................................................... 11
2.1. Module Insertion and Removal................................................................................................ 11
2.2. Cable Selection......................................................................................................................... 11
2.3. Termination.............................................................................................................................. 12
2.4. Module Pin-out Connections ................................................................................................... 12
2.5. Trusted Module Polarisation/Keying ....................................................................................... 14
3. Application .......................................................................................................... 15
3.1. Module Configuration.............................................................................................................. 15
3.2. T8451 Complex Equipment Definition..................................................................................... 15
3.2.1. Rack 1: DO ........................................................................................................................ 16
3.2.2. Rack 2: STATE ................................................................................................................... 17
3.2.3. Rack 3: AI .......................................................................................................................... 18
3.2.4. Rack 4: CI .......................................................................................................................... 18
3.2.5. Rack 5: LINE_FLT............................................................................................................... 19
3.2.6. Rack 6: DISCREP................................................................................................................ 19
3.2.7. Rack 7: HKEEPING............................................................................................................. 20
3.2.8. Rack 8: INFO ..................................................................................................................... 22
3.3. Sequence of Events Configuration........................................................................................... 24
3.4. System.INI File Configuration................................................................................................... 24
4. Operation ............................................................................................................ 25
4.1. Front Panel ............................................................................................................................... 25
4.2. Module Status LEDs.................................................................................................................. 26
4.3. I/O Status Indicators ................................................................................................................ 27

Table of Contents Trusted TMR 24Vdc Digital Output Module – 40 Channel
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5. Fault Finding and Maintenance............................................................................. 29
5.1. Fault Reporting......................................................................................................................... 29
5.2. Field Wiring Faults.................................................................................................................... 29
5.3. Module Faults .......................................................................................................................... 29
5.4. Companion Slot........................................................................................................................ 30
5.5. SmartSlot.................................................................................................................................. 30
5.6. Cold Start.................................................................................................................................. 30
5.7. Transfer between Active and Standby Modules...................................................................... 31
6. Specifications....................................................................................................... 33

Trusted TMR 24Vdc Digital Output Module – 40 Channel 1. Description
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 3
1. Description
The TMR 24 Vdc Digital Output Module is a member of the Trusted range of Input/Output
(I/O) Modules. All Trusted I/O Modules share common functionality and form. At the most
general level, all I/O Modules interface to the Inter-Module Bus (IMB) which provides power
and allows communication with the TMR Processor. In addition, all Modules have a field
interface that is used to connect to Module specific signals in the field. All Modules are
Triple Modular Redundant (TMR).
Figure 1 Module Architecture
All High Integrity I/O Modules are made up of 4 sections: Host Interface Unit (HIU), the Field
Interface Unit (FIU), the Field Termination Unit (FTU), and the Front Panel Unit (or FPU).

1. Description Trusted TMR 24Vdc Digital Output Module – 40 Channel
4 Issue 14 Rockwell Automation Publication ICSTT-RM280N-EN-P
Figure 2 shows a simplified block diagram of the Trusted 24 Vdc Digital Output Module.
Figure 2 Functional Block Diagram
1.1.Field Termination Unit (FTU)
The Field Termination Unit (FTU) is the section of the I/O Module that connects all three
FIUs to a single field interface. The FTU provides the Group Fail Safe Switches and passive
components necessary for signal conditioning, over-voltage protection, and EMI/RFI
filtering. When installed in a Trusted Controller or Expander Chassis, the FTU field connector
interconnects to the Field I/O Cable Assembly attached at the rear of the Chassis.
The SmartSlot link is passed from the HIU to the field connections via the FTU. These signals
go directly to the field connector and maintain isolation from the I/O signals on the FTU. The
SmartSlot link is the intelligent connection between Active and Standby Modules for co-
ordination during Module replacement.
1.2.Field Interface Unit (FIU)
The Field Interface Unit (FIU) is the section of the Module that contains the specific circuits
necessary to interface to the particular types of field I/O signals. Each Module has three
FIUs, one per slice. For the TMR 24 Vdc Digital Output Module, the FIU contains one stage of
the output switch structure, and sigma-delta (ΣΔ) output circuit for each of the 40 field
outputs. Two additional ΣΔ circuits provide optional monitoring of the external field I/O
supply voltage.

Trusted TMR 24Vdc Digital Output Module – 40 Channel 1. Description
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 5
The FIU receives isolated power from the HIU for logic. The FIU provides additional power
conditioning for the operational voltages required by the FIU circuitry. An isolated 6.25
Mbit/sec serial link connects each FIU to one of the HIU slices.
The FIU also measures a range of on-board “housekeeping” signals that assist in monitoring
the performance and operating conditions of the Module. These signals include power
supply voltages, current consumption, on-board reference voltages and board temperature.
1.3. Host Interface Unit (HIU)
The HIU is the point of access to the Inter-Module Bus (IMB) for the Module. It also provides
power distribution and local programmable processing power. The HIU is the only section of
the I/O Module to directly connect to the IMB Backplane. The HIU is common to most high
integrity I/O types and has type dependent and product range common functions. Each HIU
contains three independent slices, commonly referred to as A, B, and C.
All interconnections between the three slices incorporate isolation to help prevent any fault
interaction between the slices. Each slice is considered a Fault Containment Region (FCR), as
a fault on one slice has no effect on the operation of the other slices.
The HIU provides the following services common to the Modules in the family:
•High Speed Fault Tolerant Communications with the TMR Processor via the IMB
interface.
•FCR Interconnect Bus between slices to vote incoming IMB data and distribute
outgoing I/O Module data to the IMB.
•Galvanically isolated serial data interface to the FIU slices.
•Redundant power sharing of dual 24 Vdc chassis supply voltage and power
regulation for logic power to HIU circuitry.
•Magnetically isolated power to the FIU slices.
•Serial data interface to the FPU for Module status LEDs.
•SmartSlot link between Active and Standby Modules for co-ordination during
Module replacement.
•Digital Signal Processing to perform local data reduction and self-diagnostics.
•Local memory resources for storing Module operation, configuration, and field I/O
data.
•On-board housekeeping, which monitors reference voltages, current consumption
and board temperature.

1. Description Trusted TMR 24Vdc Digital Output Module – 40 Channel
6 Issue 14 Rockwell Automation Publication ICSTT-RM280N-EN-P
1.4. Front Panel Unit (FPU)
The Front Panel Unit (FPU) contains the necessary connectors, switches, logic, and LED
indicators for the Front Panel. For every type of Trusted I/O Module, the FPU contains the
Slice Healthy, Active/Standby, the Educated LED indicators, and the Module removal
switches. Additional bi-colour LEDs provide status indication for the individual I/O signals.
Serial data interfaces connect the FPU to each of the HIU slices to control the LED status
indicators and monitor the Module removal switches.
1.5. Line Monitoring and Output States
The Module automatically monitors the output channel current and voltage to determine
the state of the output channel. The numerical output state and line fault status are
reported back to the application and are represented below.
Description Numerical
Output State
Line Fault
Status
Field Short Circuit 5 1
Output Energised (On) 4 0
No Load, Field Open Circuit 31
Output De-energised (Off) 2 0
No Field Supply Voltage 1 1
Table 1 Line Monitoring Fault Status
It is recommended to fit a dummy load resistor to unused outputs so that a current is drawn
that exceeds the NO-LOAD threshold. This will help prevent the Module from signaling a
NO-LOAD fault.
1.6. Housekeeping
The Output Module automatically performs local measurements of several on-board signals
that can be used for detailed troubleshooting and verification of Module operating
characteristics. Measurements are made within each slice’s HIU and FIU.
1.7. Fault Detection/Testing
Extensive diagnostics provide the automatic detection of Module faults. The TMR
architecture of the Output Module and the diagnostics performed verify the validity of all
critical circuits. Using the TMR architecture provides a Fault Tolerant method to withstand

Trusted TMR 24Vdc Digital Output Module – 40 Channel 1. Description
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 7
the first fault occurrence on the Module and continue normal output controls without
interruption in the system or process. Faults are reported to the user through the Healthy
status indicators on the Front Panel of the Module and through the information reported to
the TMR Processor. Under normal operations all three Healthy indicators are green. When a
fault occurs, one of the Healthy indicators will be flashing red. It is recommended that this
condition is investigated and if the cause is within the Module, it should be replaced.
Module replacement activities depend on the type of spare Module configuration chosen
when the system was configured and installed. The Module may be configured with a
dedicated Companion Slot or with a SmartSlot for a spare replacement Module.
From the IMB to the field connector, the I/O Module contains extensive fault detection and
integrity testing. As an output device, most testing is performed in a non-interfering mode.
Data input from the IMB is stored in redundant error-correcting RAM on each slice portion
of the HIU. Received data is voted on by each slice. All data transmissions include a
confirmation response from the receiver.
Periodically, the TMR Processor commands the on-board Digital Signal Processors (DSPs) to
perform a Safety Layer Test (SLT). The SLT results in the DSP verifying with the TMR
Processor its ability to process data with integrity. In addition, the DSP uses Cyclical
Redundancy Checks (CRC) to verify the variables and configuration stored in Flash memory.
Between the HIU and FIU are a series of galvanically isolated links for data and power. The
data link is synchronized and monitored for variance. Both FIU and HIU have on-board
temperature sensors to characterize temperature-related problems.
The power supplies for both the HIU and FIU boards are redundant, fully instrumented and
testable. Together these assemblies form a Power Integrity Sub-system.
1.8. Sequence of Events Characteristics
The Module automatically measures the field voltage and current to determine the state of
each output channel. An event occurs when the output transitions from one state to
another. When a channel changes state, the on-board timer value is recorded. When the
TMR Processor next reads data from the Output Module, the channel state and real-time
clock value are retrieved. The TMR Processor uses this data to log the state change into the
system Sequence of Events (SOE) log. The user may configure each output to be included in
the system SOE log. Full details of SOE are contained in Trusted Sequence of Events and
Process Historian Package, publication ICSTT-RM243 (PD-T8013).

1. Description Trusted TMR 24Vdc Digital Output Module – 40 Channel
8 Issue 14 Rockwell Automation Publication ICSTT-RM280N-EN-P
1.9. Output Switch Structure
The Digital Output Module provides a TMR switch topology where the load is driven by a
total of three fully monitored, fail safe (6 element) switch channels, one physically resident
on each FIU in the Module. Any single switch or entire slice failure is designed to leave two
of the three fail safe switch channels operational to power the load.
Figure 3 Output Switch Structure
The upper switches as shown in Figure 3 are denoted as N.O. (Normally Open), and are
controlled by the FIU on which they are physically resident.1The lower switches are
depicted as N.C. (Normally Closed), and are controlled by the “upstream” neighbouring FIU.2
Note: In this context, N.O. is defined as being in the off state in the absence of control signal power, and
similarly, N.C. is the on state in the absence of control signal power. These switches are constructed from
enhancement mode MOSFETs and are both guaranteed to be off in the absence of Module power to create
gate voltage signals to bias them on3(unlike electromechanical relays for example).
The reason that the lower switches are specified to be on in the absence of control signal
power is to allow two channels to power the load should an entire slice fail. Even if an entire
slice fails, the surviving output circuits will carry the necessary control.
1Their “home” FIU.
2The home FIU, supplies an independent control signal for the “downstream” FIU FSS.
3For an un-faulted transistor.

Trusted TMR 24Vdc Digital Output Module – 40 Channel 1. Description
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 9
The structure of each FIU output is shown below:
Figure 4 Simplified Switch Circuit Diagram
A resistor provides a means of continuously monitoring the switch current. A signal
transistor is used to drive the gate of Switch 2. It provides Switch 2 with a negative gate
voltage, to minimize its on resistance, and serves to hold Switch 2 on in the event that the
secondary gate control loses power.
The Zener diode between the gate of Switch 2 and source is only required to protect the
gate from large voltage spikes on the drain that might capacitively couple through when
Switch 1 and Switch 2 are in the off state.
The resistors in series with the gate of Switch 1 and the signal transistor serve to protect the
drive logic in the event of a malicious switch failure. The pull-up resistors define the gate
voltages in the absence of power.
1.9.1. Switch Diagnostics
During normal operation, Switch 1 and Switch 2 are maintained on. In this state, Switch 1
and Switch 2 exhibit a low resistance.
To determine the ability of the system to control the load via Switch 1 and Switch 2, their
gate voltages are modulated, one at a time. As the gate voltages are modulated, the
monitoring signals synchronously change in a predictable fashion. The local DSP analyses the
relative amplitude and phase of these small AC signals, to determine the on resistance and
threshold voltages of each switch.
The current to the load does not need to be completely interrupted in order to obtain a
level of confidence in the ability of the transistors to turn off. For the TMR switch
configuration in the on state, only one fail safe switch at a time needs to be modulated,
while the other two bear the load current.

1. Description Trusted TMR 24Vdc Digital Output Module – 40 Channel
10 Issue 14 Rockwell Automation Publication ICSTT-RM280N-EN-P
1.9.2. Short Circuit Protection
Output channels are classified as protected under IEC 61131-2, specifically ‘Protected
Outputs Requirements’.
While energised, the channel output current is monitored to protect the channel switches
from damage by a sustained over-current condition. Having detected a sustained over-
current condition a short-circuit fault state is latched and the output is de-energised.
While de-energised, the output may be optionally be configured to detect short-circuit field
faults (resistance less than 24 Ω) through System .INI file configuration. The detection of
short-circuits while de-energised relies upon a partial energising of the field circuit to
determine the channel load resistance. The partial energising of a field circuit is designed
to constrain any change in field voltage or current to less than 2 V or 100 mA, respectively.
A latched short-circuit fault state can be cleared by operating the system Fault Reset button
or by transitioning the commanded channel state.
The output also includes a non-replaceable fusible link for absolute protection.
1.9.3. Group Fail Safe Switches
To support safe operation, the Output Module is equipped with a series of switches that
provide source power to a group of 8 output channels, a Power Group. The Output Module
Group Fail Safe Switch (GFSS) is intended as a final control switch which can de-energise any
outputs that cannot be de-energised in the normal way. For safety, the presence of two or
more faults within the Output Module will cause the Group Fail Safe Switches to de-
energise, resulting in all of the outputs in its group to de-energise.
There are three switches in parallel, which comprise the GFSS, one associated with each
'slice' of the power group. The GFSS’ are controlled via a signal from one of the other two
neighbouring slices. This means that if one slice determines from the output states that an
output is not in a de-energised state when it should be, then it can command its own GFSS
and those of the other slices GFSS to de-energise. This results in two of the three elements
of the GFSS structure to de-energise, leaving only one GFSS element energised. If two slices
do the same thing then the last GFSS output will de-energise. For example, this would occur
if two or more output switch elements fail in a 'stuck-on' state such that the output cannot
de-energise.
The GFSS control signal is generated by a charge pump driven from the comms clock to the
slice power group. If the clock fails then the GFSS bias collapses. This means that even if the
ability of the slice to communicate with a power group is lost, the GFSS can still be de-
energised by stopping the comms clock. If a slice fails, the watchdog on the HIU will time out
and reset the slice, this will shutdown the FIU power supply and the associated GFSS control
signal will also de-energise.

Trusted TMR 24Vdc Digital Output Module – 40 Channel 2. Installation
Rockwell Automation Publication ICSTT-RM280N-EN-P Issue 14 11
2. Installation
2.1. Module Insertion and Removal
CAUTION:
The Module contains static sensitive parts. Static handling precautions must be
observed. Specifically ensure that exposed connector pins are not touched. Under no
circumstances should the Module housing be removed.
Before installation, visually inspect the Module for damage. Ensure that the Module housing
appears undamaged and inspect the I/O connector at the back of the Module for bent pins.
If the Module appears damaged or any pins are bent, do not install the Module. Do not try
to straighten bent pins. Return the Module for replacement.
Ensure that the Module is of the correct type.
Record the Module type, revision and serial number of the Module before installation.
To install the Module:
1. Ensure that the field cable assembly is installed and correctly located.
2. If I/O Module keys are used, verify that all keys are installed in the correct positions
and properly seated in their slots.
3. Release the ejector tabs on the Module using the release key. Ensure that the ejector
tabs are fully open.
4. Holding the ejectors, carefully insert the Module into the intended slot.
5. Push the Module fully home by pressing on the top and bottom of the Module fascia.
6. Close the Module ejectors, ensuring that they click into their locked position.
The Module should mount into the chassis with a minimum of resistance. If the Module
does not mount easily, do not force it. Remove the Module and check it for bent or
damaged pins. If the pins have not been damaged, try reinstalling the Module.
2.2. Cable Selection
I/O cables suitable for use with the Trusted TMR 24 Vdc Digital Output Module are detailed
in the following Product Descriptions.
•Trusted I/O Companion Slot Cables, publication ICSTT-RM311 (PD-TC200)
•Trusted TMR I/O SmartSlot Slot Cables, publication ICSTT-RM313 (PD-TC500)

2. Installation Trusted TMR 24Vdc Digital Output Module – 40 Channel
12 Issue 14 Rockwell Automation Publication ICSTT-RM280N-EN-P
The Product Descriptions detailed above also detail the types of Field Termination Assembly
(FTA) or Versatile Field Termination Assembly (VFTA) which may be used with this type of
Module.
Custom length multi-core FTA cables are 0.5 mm2with a resistance of 40 Ω/km. e.g. a 50 m
cable will have 4 Ω loop impedance at 0.5 A, this equates to a 2 Vdc volt drop.
2.3. Termination
Unused outputs should be commanded off in the application and wired through a 4K7 0.5 W
resistor to zero volts.
2.4. Module Pin-out Connections
C B A
1 SmartSlot Link C SmartSlot Link B SmartSlot Link A
2 - - -
3Chan 5 (+) Pwr Group 1 (+) Chan 1 (+)
4 Chan 6 (+) Pwr Group 1 (+) Chan 2 (+)
5 Pwr Group 1 Rtn Pwr Group 1 (+) Pwr Group 1 Rtn
6Chan 7 (+) Pwr Group 1 (+) Chan 3 (+)
7Chan 8 (+) Pwr Group 1 (+) Chan 4 (+)
8- - -
9 Chan 13 (+) Pwr Group 2 (+) Chan 9 (+)
10 Chan 14 (+) Pwr Group 2 (+) Chan 10 (+)
11 Pwr Group 2 Rtn Pwr Group 2 (+) Pwr Group 2 Rtn
12 Chan 15 (+) Pwr group 2 (+) Chan 11 (+)
13 Chan 16 (+) Pwr Group 2 (+) Chan 12 (+)
14 - - -