Spectrum Controls 1769 User manual

ii Compact™ IO Isolated RTD/Resistance Module
User’s Manual Pub. 0300241-02 Rev. A
Important Notes
1. Please read all the information in this owner’s guide before installing the
product.
2. The information in this owner's guide applies to hardware Series A and
firmware version 1.00 or later.
3. This guide assumes that the reader has a full working knowledge of the
relevant processor.
Notice
The products and services described in this owner's guide are useful in a wide
variety of applications. Therefore, the user and others responsible for applying
the products and services described herein are responsible for determining their
acceptability for each application. While efforts have been made to provide
accurate information within this owner's guide, Spectrum Controls, Inc. assumes
no responsibility for the accuracy, completeness, or usefulness of the information
herein.
Under no circumstances will Spectrum Controls, Inc. be responsible or liable for
any damages or losses, including indirect or consequential damages or losses,
arising out of either the use of any information within this owner's guide or the
use of any product or service referenced herein.
No patent liability is assumed by Spectrum Controls, Inc. with respect to the use
of any of the information, products, circuits, programming, or services referenced
herein.
The information in this owner's guide is subject to change without notice.
Limited Warranty
Spectrum Controls, Inc. warrants that its products are free from defects in
material and workmanship under normal use and service, as described in
Spectrum Controls, Inc. literature covering this product, for a period of 1 year.
The obligations of Spectrum Controls, Inc. under this warranty are limited to
replacing or repairing, at its option, at its factory or facility, any product which
shall, in the applicable period after shipment, be returned to the Spectrum
Controls, Inc. facility, transportation charges prepaid, and which after
examination is determined, to the satisfaction of Spectrum Controls, Inc., to be
thus defective.
This warranty shall not apply to any such equipment which shall have been
repaired or altered except by Spectrum Controls, Inc. or which shall have been
subject to misuse, neglect, or accident. In no case, shall the liability of Spectrum
Controls, Inc. exceed the purchase price. The aforementioned provisions do not
extend the original warranty period of any product which has either been repaired
or replaced by Spectrum Controls, Inc.

User’s Manual Pub. 0300241-02 Rev. A
Table of Contents
IMPORTANT NOTES ............................................................................................................................................... II
CHAPTER 1 MODULE OVERVIEW......................................................................................................................... 1-1
GENERAL DESCRIPTION ........................................................................................................................... 1-1
RTD/RESISTANCE INPUTS AND RANGES..................................................................................................... 1-2
DATA FORMATS..................................................................................................................................... 1-2
FILTER FREQUENCIES .............................................................................................................................. 1-2
HARDWARE FEATURES ........................................................................................................................... 1-3
1.5.1 General Diagnostic Features .................................................................................................................... 1-3
SYSTEM OVERVIEW ................................................................................................................................ 1-3
1.6.1 Module Power-Up .................................................................................................................................... 1-3
1.6.2 Module Operation.................................................................................................................................... 1-3
CHAPTER 2 INSTALLATION AND WIRING............................................................................................................. 2-1
BEFORE YOU BEGIN ................................................................................................................................ 2-1
REQUIRED TOOLS AND EQUIPMENT ........................................................................................................... 2-1
COMPLIANCE TO EUROPEAN UNION DIRECTIVES .......................................................................................... 2-1
2.3.1 EMC Directive........................................................................................................................................... 2-1
2.3.2 Low Voltage Directive .............................................................................................................................. 2-2
POWER REQUIREMENTS .......................................................................................................................... 2-2
GENERAL CONSIDERATIONS ..................................................................................................................... 2-2
2.5.1 Hazardous Location Considerations......................................................................................................... 2-2
2.5.2 Prevent Electrostatic Discharge ............................................................................................................... 2-3
2.5.3 Remove Power ......................................................................................................................................... 2-3
2.5.4 Selecting a Location ................................................................................................................................. 2-3
Reducing Noise................................................................................................................................................................ 2-3
Power Supply Distance .................................................................................................................................................... 2-4
MOUNTING .......................................................................................................................................... 2-5
2.6.1 Minimum Spacing .................................................................................................................................... 2-5
SYSTEM ASSEMBLY ................................................................................................................................. 2-7
2.7.1 Panel Mounting........................................................................................................................................ 2-8
Panel Mounting Using the Dimensional Template .......................................................................................................... 2-9
Panel Mounting Procedure Using Modules as a Template.............................................................................................. 2-9
DIN Rail Mounting ......................................................................................................................................................... 2-10
2.7.2 Replacing a Single Module within a System........................................................................................... 2-10
FIELD WIRING CONNECTIONS ................................................................................................................. 2-10
2.8.1 System Wiring Guidelines....................................................................................................................... 2-10
Shield Grounding........................................................................................................................................................... 2-11
2.8.2 RTD Wiring Considerations .................................................................................................................... 2-12
Terminal Door Label ...................................................................................................................................................... 2-13
Removing and Replacing the Terminal Block ................................................................................................................ 2-13
2.8.3 Wiring the Finger Safe Terminal Block................................................................................................... 2-13
Wire Size and Terminal Screw Torque........................................................................................................................... 2-14
2.8.4 Wiring the Module ................................................................................................................................. 2-14
CALIBRATION ...................................................................................................................................... 2-15

ii Compact™ IO Isolated RTD/Resistance Module
User’s Manual Pub. 0300241-02 Rev. A
2.9.1 Perform the Startup Procedure.............................................................................................................. 2-16
2.9.2 Monitor Module Status to Check if the Module is Operating Correctly ................................................. 2-16
CHAPTER 3 MODULE DATA, STATUS, AND CHANNEL CONFIGURATION .............................................................. 3-1
MODULE MEMORY MAP......................................................................................................................... 3-1
CONFIGURING CHANNELS ........................................................................................................................ 3-2
3.2.1 Configuration Data File ............................................................................................................................ 3-2
3.2.2 Channel Configuration ............................................................................................................................. 3-3
3.2.3 Enabling or Disabling a Channel (Bit 15).................................................................................................. 3-4
3.2.4 Selecting Data Formats (Bits 12 through 14) ........................................................................................... 3-4
Raw/Proportional Data ................................................................................................................................................... 3-5
Engineering Units ×1 ....................................................................................................................................................... 3-6
Engineering Units ×10 ..................................................................................................................................................... 3-6
Scaled for PID .................................................................................................................................................................. 3-6
Percent Range ................................................................................................................................................................. 3-6
3.2.5 Selecting Input Type (Bits 8 through 11) .................................................................................................. 3-6
3.2.6 Selecting Temperature Units (Bit 7) ......................................................................................................... 3-6
3.2.7 Determining Open-Circuit Response (Bits 5 and 6) .................................................................................. 3-7
3.2.8 Cyclic Lead Compensation (Bit 4) ............................................................................................................. 3-7
3.2.9 Selecting Input Filter Frequency (Bits 0 through 2) .................................................................................. 3-7
Effects of Filter Frequency on Noise Rejection................................................................................................................ 3-8
Cut-Off Frequency ........................................................................................................................................................... 3-9
Repeatability ................................................................................................................................................................... 3-9
Module Update Time ...................................................................................................................................................... 3-9
INPUT IMAGE FILE ................................................................................................................................ 3-10
INPUT DATA FILE ................................................................................................................................. 3-10
3.4.1 Input Data Values................................................................................................................................... 3-11
3.4.2 General Status Bits (S0 to S7)................................................................................................................. 3-11
Input Data Not Valid Condition ..................................................................................................................................... 3-11
3.4.3 Open-Circuit Flag Bits (OC0 to OC7)....................................................................................................... 3-12
3.4.4 Over-Range Flag Bits (O0 to O7) ............................................................................................................ 3-12
3.4.5 Under Range Flag Bits (U0 to U7) .......................................................................................................... 3-12
CHAPTER 4 DIAGNOSTICS AND TROUBLESHOOTING........................................................................................... 4-1
SAFETY CONSIDERATIONS ....................................................................................................................... 4-1
4.1.1 Indicator Lights ........................................................................................................................................ 4-1
4.1.2 Stand Clear of Equipment ........................................................................................................................ 4-1
4.1.3 Program Alteration .................................................................................................................................. 4-1
4.1.4 Safety Circuits........................................................................................................................................... 4-2
MODULE OPERATION VS.CHANNEL OPERATION ......................................................................................... 4-2
POWER-UP DIAGNOSTICS........................................................................................................................ 4-2
CHANNEL DIAGNOSTICS .......................................................................................................................... 4-3
4.4.1 Invalid Channel Configuration Detection ................................................................................................. 4-3
4.4.2 Over or Under Range Detection ............................................................................................................... 4-3
4.4.3 Open Circuit Detection ............................................................................................................................. 4-3
NON-CRITICAL VS.CRITICAL MODULE ERRORS ............................................................................................. 4-3
MODULE ERROR DEFINITION TABLE........................................................................................................... 4-4

Compact™ IO Isolated RTD/Resistance Module iii
User’s Manual Pub. 0300241-01 Rev. A
4.6.1 Module Error Field.................................................................................................................................... 4-4
4.6.2 Extended Error Information Field............................................................................................................. 4-4
4.6.3 Hardware Errors....................................................................................................................................... 4-5
4.6.4 Configuration Errors................................................................................................................................. 4-5
ERROR CODES ....................................................................................................................................... 4-5
MODULE INHIBIT FUNCTION .................................................................................................................... 4-6
APPENDIX A SPECIFICATIONS..............................................................................................................................A-1
APPENDIX B MODULE CONFIGURATION USING MICROLOGIX 1500 AND RSLOGIX 500.......................................B-1
APPENDIX C CONFIGURING THE IR6I FOR COMPACTLOGIX CONTROLLERS IN RSLOGIX 5000 .............................. C-1
CONFIGURING I/O MODULES ....................................................................................................................................... C-4
APPENDIX D CONFIGURING THE IR6I TO BE USED WITH A 1769-ADN DEVICENET ADAPTER ..............................D-1
CONFIGURING THE 1769SC-IR6I .................................................................................................................................. D-3

iv Compact™ IO Isolated RTD/Resistance Module
User’s Manual Pub. 0300241-02 Rev. A
Preface
Read this preface to familiarize yourself with the rest of the manual. This preface
covers the following topics:
•Who should use this manual
•How to use this manual
•Related publications
•Conventions used in this manual
•Rockwell Automation support
Who Should
Use This Manual
Use this manual if you are responsible for designing, installing, programming, or
troubleshooting control systems that use Allen-Bradley Compact™ I/O and/or
compatible controllers, such as MicroLogix 1500 or CompactLogix.
How to Use
This Manual
As much as possible, we organized this manual to explain, in a task-by-task
manner, how to install, configure, program, operate and troubleshoot a control
system using the 1769sc-IR6I.
Related
Documentation
The table below provides a listing of publications that contain important
information about Allen-Bradley PLC systems.
For Refer to this Document Allen-Bradley
Pub. No.
User instructions MicroLogix™ 1500
User Manual 1764-UM001A
Product information
1769 Compact Discrete
Input/Output Modules
Product Data
1769-2.1
Overview of MicroLogix 1500
system
MicroLogix™ 1500
System Overview 1764-SO001B
Overview of Compact IO system Compact™ I/O System
Overview 1769-SO001A
User Instructions CompactLogix User
Manual 1769-UM007B
Wiring and grounding information
Allen-Bradley
Programmable
Controller Grounding
and Wiring Guidelines
1770-4.1

Compact™ IO Isolated RTD/Resistance Module v
User’s Manual Pub. 0300241-01 Rev. A
Technical
Support
For technical support, please contact your local Rockwell Automation
TechConnect Office for all Spectrum products. Contact numbers are as follows:
•USA 440-646-6900
•United Kingdom 01908 635230
•Australia 1800-809-929
•Mexico 001-888-365-8677
•Brazil (55) 11 3618 8800
•Europe [phone]
or send an email to
[e-mail]
Documentation
If you would like a manual, you can download a free electronic version from the
Internet at www.spectrumcontrols.com
Conventions
Used in This
Manual
The following conventions are used throughout this manual:
•Bulleted lists (like this one) provide information not procedural steps.
•lists provide sequential steps or hierarchical information.
•Italic type is used for emphasis.
•Bold type identifies headings and sub-headings:
WARNING
Identifies information about practices or circumstances that can lead to
personal injury or death, property damage, or economic loss. These
messages help you to identify a hazard, avoid a hazard, and recognize the
consequences.
ATTENTION
Actions ou situations risquant d’entraîner des blessures pouvant être
mortelles, des dégâts matériels ou des pertes financières. Les messages «
Attention » vous aident à identifier un danger, à éviter ce danger et en
discerner les conséquences.
NOTE
Identifies information that is critical for successful application and
understanding of the product.

vi Compact™ IO Isolated RTD/Resistance Module
User’s Manual Pub. 0300241-02 Rev. A

User’s Manual Pub. 0300241-02 Rev. A
Chapter 1
Module Overview
This chapter describes the 1769sc-IR6I and the conformally coated 176sc-IF6IK
Isolated RTD/Resistance input modules and explains how the controller reads
resistance temperature detector (RTD) or direct resistance-initiated analog input
data from the modules. Other than the conformal coating, both modules are
identical so all information applicable to the 1769sc-IR6I also applies to the K
version. The following section covers:
•The module’s hardware and diagnostic features.
•An overview of system and module operation.
•Compatibility.
General
Description
The 1769sc-IR6I (isolated RTD/Resistance input) module supports RTD and
direct resistance signal measurement applications that require up to six channels.
The module digitally converts analog data, and then stores the converted data in
its image table.
The module supports connections from any combination of up to six input
devices. Each channel is individually configurable via software for 2- or 3-wire
RTD or direct resistance input devices. Channels are compatible with 4-wire
sensors, but the fourth sense wire is not used. Two programmable excitation
current values (0 to 42 mA and 1.0 mA) are provided, to limit RTD self-heating.
When configured for RTD inputs, the module can convert the RTD readings into
linearized digital temperature readings in °C or °F. When configured for
resistance analog inputs, the module can convert voltages into linearized
resistance values in ohms. The module assumes that the direct resistance input
signal is linear prior to input to the module.
Each channel provides open-circuit (all wires), short-circuit (All wires work –
resistance ranges don’t apply), and over- and under-range detection and
indication.
NOTE
The module accepts input from RTDs with up to 3 wires. If your
application requires a 4-wire RTD, one of the two lead compensation
wires is not used, and the RTD is treated like a 3-wire sensor. The third
wire provides lead wire compensation. See Chapter 2, Installation and
Wiring, for more information.

1-2 Chapter 1: Module Overview
User’s Manual Pub. 0300241-02 Rev. A
RTD/Resistance
Inputs and Ranges
The table below lists the RTD and resistance types and their associated full-scale
ranges, supported by the IR6I module.
Table 1-1. RTD/Resistance Input Ranges
Input Type
Input Range
˚ Celsius ˚ Fahrenheit
Pt 385 -200 to +850 -328 to 1562
Pt 3916 -200 to +630 -328 to 1166
10 Cu 426 -100 to +260 -148 to 500
100 Ni 618 -100 to +260 -148 to 500
120 Ni 672 -80 to +260 -112 to 500
604 NiFe 518 -100 to +200 -148 to 392
150 Ω0 to +15001
500 Ω0 to +5001
1000 Ω0 to +10001
3000 Ω0 to +30001
Data Formats
The data can be configured on board each module as:
•Engineering units × 1
•Engineering units × 10
•Scaled-for-PID
•Percent of full scale
•Raw/proportional data
Filter Frequencies
The module uses a digital filter that provides high frequency noise rejection for
the input signals. The filter is programmable, allowing you to select from six
different filter frequencies for each channel:
•4.17 Hz
•10 Hz
•16.7 Hz
•19.6 Hz
•62 Hz
•470 Hz

Chapter 1: Module Overview 1-3
User’s Manual Pub. 0300241-01 Rev. A
Hardware
Features
The Isolated RTD/resistance module contains a removable terminal block (spare
part number 1769-RTBN18) providing connections for six 3-wire inputs for any
combination of RTD and resistance input devices. Channels are wired as
differential inputs.
Module configuration is normally done via the controller’s programming
software. In addition, some controllers support configuration via the user
program. In either case, the module configuration is stored in the memory of the
controller. Refer to your controller’s user manual for more information.
1.5.1 General Diagnostic Features
The module contains a diagnostic LED that helps you identify the source of
problems that may occur during power-up or during normal channel operation.
The LED indicates both status and power. Power-up and channel diagnostics are
explained in Chapter 4, Diagnostics and Troubleshooting.
System Overview
The modules communicate to the controller through the bus interface. The
modules also receive 5 and 24 VDC power through the bus interface.
1.6.1 Module Power-Up
At power-up, the module performs a check of its internal circuits, memory, and
basic functions. During this time, the module status LED remains off. If no
faults are found during power-up diagnostics, the module status LED is turned
on.
After power-up checks are complete, the module waits for valid channel
configuration data. If an invalid configuration is detected, the module generates
a configuration error. Once a channel is properly configured and enabled, it
continuously converts the RTD or resistance input to a value within the range
selected for that channel.
Each time a channel is read by the input module, that data value is tested by the
module for an over-range, under-range, open-circuit, or “input data not valid”
condition. If such a condition is detected, a unique bit is set in the channel status
word. The channel status word is described in Input Data File on page 3-10.
Using the module image table, the controller reads the two’s complement binary
converted RTD or resistance data from the module. This typically occurs at the
end of the program scan or when commanded by the control program. If the
controller and the module determine that the data transfer has been made without
error, the data is used in the control program.
1.6.2 Module Operation
As shown in the block diagram below, each input channel of the module consists
of an RTD/resistance connection that accepts excitation current (i.e. current out);
a sense connection that detects lead wire resistance; and a return connection.
Each channel has an A/D converter that reads the RTD or resistance value and
the lead wire resistance.

1-4 Chapter 1: Module Overview
User’s Manual Pub. 0300241-02 Rev. A
BACKPLANE
CONNECTOR
3.3V
POWER
TERMINAL
BLOCK
710Vdc for one minute Field
to Backplane Isolation
710Vdc for one minute
Channel to Channel Isolation
x6 isolated channels
AD7785
20-bit ADC,
Reference, Mux,
and
Programmable
Gain In-Amp
SENSE Input SENSE
24V to 3.3V
Isolated
5V to 5V
power
+
Digital
Isolators
IRTN
Current RTN
RS-485
BUS
5V to 5V (analog) 5V Analog
POWER
LPC2131
Processor
w/ Flash and
SRAM
Mercury
ASIC
Current OUT IOUT
From the readings taken by the converter, the module returns an accurate
temperature or resistance to the controller user program through the
microprocessor. The module uses two bidirectional serial ports for
communication, each using an optocoupler for isolation. A third optocoupler is
used to reset the microprocessor if the module detects a loss of communication.

User’s Manual Pub. 0300241-02 Rev. A
Chapter 2
Installation and Wiring
Before you Begin
This chapter covers:
•Tools and Equipment
•Compliance to European Union directives
•Power requirements
•General considerations
•Mounting
Required Tools
and Equipment
You need the following tools and equipment:
•Medium blade or cross-head screwdriver
•RTD or direct resistance input device
•Shielded, twisted-pair cable for wiring (Belden™ 9501 or equivalent)
•Controller (for example, a MicroLogix™ 1500 or CompactLogix™
controller)
•Programming device and software (for example, RSLogix 500™ or
RSLogix 5000™)
Compliance to
European Union
Directives
This product is approved for installation within the European Union and EEA
regions. It has been designed and tested to meet the following directives.
2.3.1 EMC Directive
The 1769sc-IR6I module is tested to meet Council Directive 2014/30/EU
Electromagnetic Compatibility (EMC) and the following standards, in whole or
in part, documented in a technical construction file:
•EN 61131-2 Programable controllers, Part 2 - Equipment requirements
and tests.
•EN 61000-6-2 Electromagnetic compatibility (EMC) – Part 6-2: Generic
standards – Immunity standard for industrial environments.
•EN 61000-6-4 Electromagnetic compatibility (EMC) – Part 6-4: Generic
standards – Emission standard for industrial environments.
This product is intended for use in an industrial environment.

2-2 Chapter 2: Installation and Wiring
User’s Manual Pub. 0300241-02 Rev. A
2.3.2 Low Voltage Directive
This product is designed to, and verified in compliance with, European Union
Safety Standards:
•EN 61010-1
•EN 61010-2-201
Power
Requirements
The module receives power through the bus interface from the +5 VDC/+24
VDC system power supply. The maximum current drawn by the module is
shown in the table below:
5 VDC 24 VDC
190 mA 35 mA
The system power supply may be a 1769-PA2, -PB2, -PA4, -PB4, or the internal
supply of the MicroLogix 1500 packaged controller. The module cannot be
located more than 8 modules away from the system power supply.
General
Considerations
Compact I/O is suitable for use in an industrial environment when installed in
accordance with these instructions. Specifically, this equipment is intended for
use in clean, dry environments (Pollution degree 21) and to circuits not exceeding
Over Voltage Category II2(IEC 60664-1)3
2.5.1 Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. Operating temperature code T5 is assumed. The
following WARNING statement applies to use in hazardous locations.
1Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that
occasionally a temporary conductivity caused by condensation shall be expected.
2Over Voltage Category II is the load level section of the electrical distribution system. At this level,
transient voltages are controlled and do not exceed the impulse voltage capability of the product’s
insulation.
3. Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC)
designations.

Chapter 1: Module Overview 2-3
User’s Manual Pub. 0300241-02 Rev. A
WARNING
EXPLOSION HAZARD
•Substitution of components may impair suitability for Class I,
Division 2. Do not replace components or disconnect equipment
unless power has been switched off or the area is known to be
non-hazardous.
•Do not connect or disconnect components unless power has been
switched off or the area is known to be non-hazardous.
•Device shall be installed in an enclosure which can only be
opened with the use of a tool.
•All wiring must comply with N.E.C. article 501-4(b), 502-4(b), or
503-3(b), as appropriate for Class I, Class II, and Class III
equipment.
2.5.2 Prevent Electrostatic Discharge
WARNING
Electrostatic discharge can damage integrated circuits or semiconductors if
you touch analog I/O module bus connector pins or the terminal block on
the input module. Follow these guidelines when you handle the module:
•Touch a grounded object to discharge static potential.
•Wear an approved wrist-strap grounding device.
•Do not touch the bus connector or connector pins.
•Do not touch circuit components inside the module.
•If available, use a static-safe work station.
•When it is not in use, keep the module in its static-shield bag.
2.5.3 Remove Power
WARNING
Remove power before removing or inserting this module. When you
remove, or insert, a module with power applied, an electrical arc may
occur. An electrical arc can cause personal injury or property damage by:
•Sending an erroneous signal to your system’s field devices,
causing unintended machine motion.
•Causing an explosion in a hazardous environment.
•Causing an electrical arc. Such arcing causes excessive wear to
contacts on both the module and its mating connector, and may
lead to premature failure.
2.5.4 Selecting a Location
Reducing Noise
Most applications require installation in an industrial enclosure to reduce the
effects of electrical interference. Analog inputs are highly susceptible to
electrical noise. Electrical noise coupled to the analog inputs will reduce the
performance (accuracy) of the module.

2-4 Chapter 2: Installation and Wiring
User’s Manual Pub. 0300241-02 Rev. A
Group your modules to minimize adverse effects from radiated electrical noise
and heat. Consider the following conditions when selecting a location for the
analog module. Position the module:
•Away from sources of electrical noise such as hard-contact switches,
relays, and AC motor drives
•Away from modules which generate significant radiated heat, such as the
1769-IA16. Refer to the module’s heat dissipation specification.
In addition, route shielded, twisted-pair analog input wiring away from any high
voltage I/O wiring.
Power Supply Distance
You can install as many modules as your power supply can support. However,
all 1769 I/O modules have power supply distance ratings. The maximum I/O
module rating is 8, which means that a module may not be located more than 8
modules away from the system power supply.
Figure 2-1. Power Supply Distance

Chapter 1: Module Overview 2-5
User’s Manual Pub. 0300241-02 Rev. A
Mounting
WARNING
Keeping module free of debris and avoiding overheating:
•Do not remove protective debris strip until after the module and
all other equipment near the module is mounted and the wiring is
complete.
•Once wiring is complete, and the module is free of debris,
carefully remove protective strip.
•Failure to remove strip before operating can cause overheating.
2.6.1 Minimum Spacing
Maintain spacing from enclosure walls, wire ways, adjacent equipment, etc.
Allow 50.8 mm (2 in.) of space on all sides for adequate ventilation, as shown:
Figure 2-2. Minimum Spacing

2-6 Chapter 2: Installation and Wiring
User’s Manual Pub. 0300241-02 Rev. A
Figure 2-3. Module Parts List
Item Description
1 Bus lever
2a Upper panel mounting tab
2b Lower panel mounting tab
3 Module status LED
4 Module door with terminal identification label
5a Movable bus connector (bus interface) with female pins
5b Stationary bus connector (bus interface) with male pins
6 Nameplate label
7a Upper tongue-and-groove slots
7b Lower tongue-and-groove slots
8a Upper DIN rail latch
8b Lower DIN rail latch
9 Write-on label for user identification tags
10 Removable terminal block (RTB) with finger-safe cover
10a RTB upper retaining screw
10b RTB lower retaining screw
11 CJC sensors

Chapter 1: Module Overview 2-7
User’s Manual Pub. 0300241-02 Rev. A
System Assembly
The module can be attached to the controller or an adjacent I/O module before or
after mounting. For mounting instructions, see Panel Mounting Using the
Dimensional Template below, or DIN Rail Mounting. To work with a system
that is already mounted, see Replacing a Single Module within a System.
The following procedure shows you how to assemble the Compact I/O system.
Figure 2-4. Module Assembly
1. Disconnect power.
2. Check that the bus lever of the module to be installed is in the unlocked
(fully right) position.
NOTE
If the module is being installed to the left of an existing module, check
that the right-side adjacent module’s bus lever is in the unlocked (fully
right) position.
1. Use the upper and lower tongue-and-groove slots (1) to secure the
modules together (or to a controller).
2. Move the module back along the tongue-and-groove slots until the bus
connectors (2) line up with each other.
3. Push the bus lever back slightly to clear the positioning tab (3). Use your
fingers or a small screwdriver.
4. To allow communication between the controller and module, move the
bus lever fully to the left (4) until it clicks. Ensure it is locked firmly in
place.

2-8 Chapter 2: Installation and Wiring
User’s Manual Pub. 0300241-02 Rev. A
WARNING
When attaching I/O modules, it is very important that the bus connectors
are securely locked together to ensure proper electrical connection.
5. Attach an end cap terminator (5) to the last module in the system by
using the tongue-and-groove slots as before.
6. Lock the end cap bus terminator (6).
WARNING
A 1769-ECR or 1769-ECL right or left end cap respectively must be used
to terminate the end of the 1769 communication bus.
2.7.1 Panel Mounting
WARNING
During panel or DIN rail mounting of all devices, be sure that all debris
(metal chips, wire strands, etc.) is kept from falling into the module.
Debris that falls into the module could cause damage at power up.
Mount the module to a panel using two screws per module. Use M4 or #8 pan
head screws. Mounting screws are required on every module.