Rockwell Automation 1769-IR6 User Manual

User Manual

Compact I/O RTD/Resistance Input Module

Catalog Number 1769-IR6

Important User Information

Solid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local Rockwell Automation® sales office or online at http://www.rockwellautomation.com/literature/) describes some important differences between solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid-state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.

IMPORTANT Identifies information that is critical for successful application and understanding of the product.

Allen-Bradley, Rockwell Software, Rockwell Automation, Compact I/O, CompactLogix, MicroLogix, RSLogix 500, RSLOgix 5000, and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Summary of Changes

New and Updated

Information

This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.

This table contains the changes made to this revision.

Topic	Page
Updated RTD accuracy and temperature drift values	14
Updated module accuracy values	79

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Summary of Changes

Notes:

4	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

		Table of Contents
Preface	Who Should Use This Manual . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . 9
	How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . 9
	Conventions Used in This Manual . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . 9
	Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . 9
	Chapter 1
Overview	General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 11
	RTD Compatibility . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 12
	Resistance Device Compatibility. . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 15
	Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 16
	General Diagnostic Features. . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 17
	System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 17
	System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 17
	Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 18
	Module Field Calibration . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . 19

Quick Start for Experienced Users

Installation and Wiring

Chapter 2

Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

What You Need To Do. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Chapter 3

Compliance to European Union Directives. . . . . . . . . . . . . . . . . . . . . . . . . 27 EMC Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 General Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Hazardous Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Remove Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Selecting a Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

System Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Minimum Spacing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

DIN Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Replacing a Single Module within a System . . . . . . . . . . . . . . . . . . . . . . . . . 35 Field Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

System Wiring Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

RTD Wiring Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Terminal Door Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Removing and Replacing the Terminal Block . . . . . . . . . . . . . . . . . . . 38 Wiring the Finger-Safe Terminal Block. . . . . . . . . . . . . . . . . . . . . . . . . 39

Wiring the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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Table of Contents

Module Data, Status, and

Channel Configuration

Wiring RTDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Wiring Resistance Devices (Potentiometers) . . . . . . . . . . . . . . . . . . . . 42

Chapter 4

Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Accessing Input Image File Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Input Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Input Data Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 General Status Flag Bits (S0…S5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Open-Circuit Flag Bits (OC0…OC5) . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Over-Range Flag Bits (O0…O5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Under-Range Flag Bits (U0…U5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Configuring Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Configuration Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Enabling or Disabling a Channel (Bit 15) . . . . . . . . . . . . . . . . . . . . . . . 53

Selecting Data Format (Bits 12…14). . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Selecting Input/Sensor Type (Bits 8…11) . . . . . . . . . . . . . . . . . . . . . . . 59 Selecting Temperature Units/Mode (Bit 7) . . . . . . . . . . . . . . . . . . . . . 59

Selecting Open-Circuit Response (Bits 5 and 6) . . . . . . . . . . . . . . . . . 59

Selecting Cyclic Lead Compensation (Bit 4) . . . . . . . . . . . . . . . . . . . . 60 Selecting Excitation Current (Bit 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Setting Filter Frequency (Bits 0…2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Selecting Enable/Disable Cyclic

Autocalibration (Word 6, Bit 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Determining Effective Resolution and Range . . . . . . . . . . . . . . . . . . . . . . . 65

Determining Module Update Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Effects of Autocalibration on Module Update Time . . . . . . . . . . . . . 73

Calculating Module Update Time with

Autocalibration Enabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Effects of Cyclic Lead Wire Compensation on Module

Update Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Calculating Module Update Time with Cyclic Lead Wire

Compensation Enabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Impact of Autocalibration and Lead Wire Compensation

on Module Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Effects of Autocalibration on Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

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Table of Contents

Diagnostics and

Troubleshooting

Chapter 5

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Activating Devices When Troubleshooting . . . . . . . . . . . . . . . . . . . . . 81 Stand Clear of the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Program Alteration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Safety Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Module Operation versus Channel Operation . . . . . . . . . . . . . . . . . . . . . . 82

Power-up Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Channel Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Invalid Channel Configuration Detection . . . . . . . . . . . . . . . . . . . . . . 83

Out-of-Range Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Open-Wire or Short-Circuit Detection . . . . . . . . . . . . . . . . . . . . . . . . 84 Non-critical versus Critical Module Errors . . . . . . . . . . . . . . . . . . . . . . . . . 84

Module Error Definition Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Module Error Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Extended Error Information Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Module Inhibit Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Module Addressing and Programming with MicroLogix 1500 and RSLogix 500

Configuring the 1769-IR6 RTD Module with the Generic Profile

Configuring the 1769-IR6 Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

Two’s Complement Binary Numbers

Appendix A

Module Addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

1769-IR6 Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Configuring the 1769-IR6 in a MicroLogix 1500 System . . . . . . . . . . . . 93

Appendix B

Configuring I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Configuring a 1769-IR6 RTD Input Module . . . . . . . . . . . . . . . . . . 102

Appendix C

Configuring the 1769-IR6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Appendix D

Positive Decimal Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Negative Decimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

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Table of Contents

Notes:

8	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Preface

Who Should Use This

Manual

How to Use This Manual

Conventions Used in This

Manual

Additional Resources

Read this preface to familiarize yourself with the rest of the 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.

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 1769-IR6.

The following conventions are used throughout this manual:

·Bulleted lists (like this one) provide information not procedural steps.

·Numbered lists provide sequential steps or hierarchical information.

·Italic type is used for emphasis.

·Text in this font indicates words or phrases you should type.

These documents contain additional information concerning related products from Rockwell Automation.

Resource	Description
1769 Compact I/O Modules Specifications Technical Data,	Specifications of all 1769 Compact I/O modules
publication 1769-TD006
Industrial Automation Wiring and Grounding Guidelines, publication	Provides general guidelines for installing a Rockwell Automation
1770-4.1	industrial system.
Product Certifications website, http://www.ab.com	Provides declarations of conformity, certificates, and other
	certification details.

You can view or download publications at http:/www.rockwellautomation.com/literature/. To order paper copies of technical documentation, contact your local Allen-Bradley distributor or Rockwell Automation sales representative.

Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

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Preface

Notes:

10	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Chapter 1

Overview

General Description

This chapter describes the six-channel 1769-IR6 RTD/resistance Input module and explains how the controller reads resistance temperature detector (RTD) or direct resistance-initiated analog input data from the module. Included is:

·a general description of hardware features

·an overview of module and system operation

·compatibility

The 1769-IR6 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 (0.5mA and 1.0mA) 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 (excitation and return wires only), and overand under-range detection and indication.

IMPORTANT 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 3, Installation and Wiring, for more information.

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Chapter 1	Overview

The following data formats are supported by the module.:

·raw/proportional

·engineering units x 1

·engineering units x 10

·scaled-for-PID

·percent full scale

Available filter frequencies are:

·10 Hz

·50 Hz

·60 Hz

·250 Hz

·500 Hz

·1 kHz

The module uses eight input words for data and status bits and seven configuration words. Module configuration is stored in the controller memory. Normally configuration is done via the controller’s programming software. In addition, some controllers support configuration via the user program. Refer to your controller manual for additional information. See Chapter 4, Module Data, Status, and Channel Configuration, for details on module configuration.

RTD Compatibility

An RTD consists of a temperature-sensing element connected by two, three, or four wires that provide input to the module. The following table lists the RTD types that you can use with the module, including their temperature range, effective resolution, and repeatability for both excitation currents, 0.5 and 1.0 mA.

12	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Overview	Chapter 1

Table 1 - RTD Specifications

	RTD Type(1)		Temperature Range Using	Temperature Range Using	Maximum	Maximum
			0.5 mA Excitation	1.0 mA Excitation	Scaled	Scaled
					Resolution	Repeatability
	Copper 426	10 Ω	Not allowed	-100…260 °C (-148…500 °F)	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
	Nickel	120 Ω	-100…260 °C (-148…500 °F)	-100…260 °C (-148…500 °F)	0.1 °C (0.1 °F)	±0.1 °C (±0.2 °F)
	618(2)
	Nickel 672	120 Ω	-80…260 °C (-112…500 °F)	-80…260 °C (-112…500 °F)	0.1 °C (0.1 °F)	±0.1 °C (±0.2 °F)
	Nickel-Iron	604 Ω	-200…180 °C (-328…338 °F)	-100…200 °C (-148…392 °F)	0.1 °C (0.1 °F)	±0.1 °C (±0.2 °F)
	518
	Platinum	100 Ω	-200…850 °C (-328…1562 °F)	-200…850 °C (-328…1562 °F)	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
	385
		200 Ω	-200…850 °C (-328…1562 °F)	-200…850 °C (-328…1562 °F)	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
		500 Ω	-200…850 °C (-328…1562 °F)	-200…850 °C (-328…1562 °F)	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
		1000 Ω	-200…850 °C (-328…1562 °F)	Not Allowed	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
	Platinum	100 Ω	-200C…630 °C (-328…1166 °F)	-200…630 °C (-328…1166 °F)	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
	3916
		200 Ω	-200…630 °C (-328…1166 °F)	-200…630 °C (-328…1166 °F)	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
		500 Ω	-200…630 °C (-328…1166 °F)	-200…630 °C (-328…1166 °F)	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)
		1000 Ω	-200…630 °C (-328…1166 °F)	Not Allowed	0.1 °C (0.1 °F)	±0.2 °C (±0.4 °F)

(1)Digits following the RTD type represent the temperature coefficient of resistance (α), which is defined as the resistance change per ohm per °C. For instance, platinum 385 refers to a platinum RTD with α = 0.00385 ohm/ohm - °C, or simply 0.00385/°C.

(2)Actual value at 0 °C is 100 Ω per DIN standard.

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Chapter 1 Overview

The table below provide specifications for RTD accuracy and temperature drift. The ratings apply when a 50/60 Hz filter is used.

		Table 2 - RTD Accuracy and Temperature Drift
		RTD Type		Maximum Scaled Accuracy	Maximum Scaled Accuracy	Maximum Temperature Drift
				(25 °C with Calibration)	(0…60 °C with Calibration)	(from 25 °C without
						Calibration)
		Copper 426	10 Ω	±0.8 °C (1.44 °F)	±1.1 °C (1.98 °F)	±0.032 °C/°C (0.032 °F/°F)
		Nickel 618	120 Ω	±0.3 °C (±0.54 °F)	±0.5 °C (±0.9 °F)	±0.012 °C/°C (±0.012 °F/°F)
		Nickel 672	120 Ω	±0.3 °C (±0.54 °F)	±0.5 °C (±0.9 °F)	±0.012 °C/°C (±0.012 °F/°F)
		Nickel-Iron 518	604 Ω	±0.3 °C (±0.54 °F)	±0.5 °C (±0.9 °F)	±0.015 °C/°C (±0.015 °F/°F)
		Platinum 385	100 Ω	±0.5 °C (±0.9 °F)	±0.9 °C (±1.62 °F)	±0.026 °C/°C (±0.026 °F/°F)
			200 Ω	±0.5 °C (±0.9 °F)	±0.9 °C (±1.62 °F)	±0.026 °C/°C (±0.026 °F/°F)
			500 Ω	±0.5 °C (±0.9 °F)	±0.9 °C (±1.62 °F)	±0.026 °C/°C (±0.026 °F/°F)
			1000 Ω	±0.5 °C (±0.9 °F)	±0.9 °C (±1.62 °F)	±0.026 °C/°C (±0.026 °F/°F)
		Platinum 3916	100 Ω	±0.4 °C (±0.72 °F)	±0.8 °C (±1.44 °F)	±0.023 °C/°C (±0.023 °F/°F)
			200 Ω	±0.4 °C (±0.72 °F)	±0.8 °C (±1.44 °F)	±0.023 °C/°C (±0.023 °F/°F)
			500 Ω	±0.4 °C (±0.72 °F)	±0.8 °C (±1.44 °F)	±0.023 °C/°C (±0.023 °F/°F)
			1000 Ω	±0.4 °C (±0.72 °F)	±0.8 °C (±1.44 °F)	±0.023 °C/°C (±0.023 °F/°F)

IMPORTANT	When you are using any platinum (385) RTDs with 0.5 mA excitation current, the
	module’s accuracy is:
	·	±0.5 °C (0.9 °F) after you apply power to the module or perform an
		autocalibration at 25 °C (77 °F) ambient, with module operating temperature at
		25 °C (77 °F).
	·	±[0.5 °C (0.9 °F) + DT ± 0.026 deg./°C (±0.026 deg./°F)] after you apply power
		to the module or perform an autocalibration at 25 °C (77 °F) ambient, with
		module operating temperature between 0…60 °C (140 °F). DT is the temperature
		difference between the actual module operating temperature and 25°C (77 °F).
		The value 0.026 deg./°C (±0.026 deg./°F) is the temperature drift shown in the
		table above.
	·	±0.9 °C after you apply power to the module or perform an autocalibration at
		60 °C (140 °F) ambient, with module operating temperature at 60 °C (140 °F).

14	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Overview Chapter 1

Resistance Device Compatibility

The following table lists the specifications for the resistance devices that you can use with the module.

Table 3 - Resistance Device Specifications

Resistance	Resistance Range	Resistance Range	Accuracy(1)	Temperature Drift	Resolution	Repeatability
Device	(0.5 mA Excitation)	(1.0 mA Excitation)
Type
150 Ω	0…150 Ω	0…150 Ω	±0.15 Ω	±0.007 Ω/°C	0.01 Ω	±0.04 Ω
				(±0.013 Ω/°F)
500 Ω	0…500 Ω	0…500 Ω	±0.5 Ω	±0.023 Ω/°C	0.1 Ω	±0.2 Ω
				(±0.041 Ω/°F)
1000 Ω	0…1000 Ω	0…1000 Ω	±1.0 Ω	±0.043 Ω/°C	0.1 Ω	±0.2 Ω
				(±0.077 Ω/°F)
3000 Ω	0…3000 Ω	Not allowed	±1.5 Ω	±0.072 Ω/°C	0.1 Ω	±0.2 Ω
				(±0.130 Ω/°F)

(1) Accuracy values are based on the assumption that the module has been calibrated to the temperature range of 0…60 °C (32…140 °F).

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15

Chapter 1	Overview

Hardware Features

The 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. The illustration below shows the hardware features of the module.

				8a
1		2a	7a	7a
	OK		3	OK
	Analog			Analog
	DANGER		5a
	Do Not Remove RTB Under Power
10a	Unless Area is Non-Hazardous
	EXC 3	EXC 0
	RTN 3-	SENSE 0	9	5b
		RTN 0
	SENSE	3
		EXC 1
	EXC 4
10		SENSE 1
	SENSE	RTN 1
		4
	RTN 4
		EXC 2
	EXC 5
10b		SENSE 2
	SENSE 5
	RTN 5	RTN 2
		Ensure Adjacent	4
	Bus Lever is Unlatched/Latched			6
	Before/After
	Removing/Inserting Module
		1769-IR6
		2b	7b	7b

8b

Item	Description
1	bus lever (with locking function)
2a	upper panel mounting tab
2b	lower panel mounting tab
3	module status indicator
4	module door with terminal identification label
5a	movable bus connector with female pins
5b	stationary bus connector 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 (user ID tag)
10	removable terminal block with finger-safe cover
10a	terminal block upper retaining screw
10b	terminal block lower retaining screw

16	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Overview	Chapter 1

General Diagnostic Features

System Overview

A single diagnostic indicator helps you identify the source of problems that may occur during powerup or during normal channel operation. The indicator shows both status and power. See Chapter 5, Diagnostics and Troubleshooting, for details on power-up and channel diagnostics.

The modules communicate to the local controller or communication adapter through the 1769 bus interface. The modules also receive 5 and 24V DC power through the bus interface.

System Operation

At powerup, the module performs a check of its internal circuits, memory, and basic functions. During this time, the module status indicator remains off. If no faults are found during power-up diagnostics, the module status indicator 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, the module continuously converts the RTD or resistance input to a value within the range selected for that channel.

Each time the module reads an input channel, it tests the data for a fault (overor under-range, short-circuit, or open-circuit condition). If it detects a fault, the module sets a unique bit in the channel status word. See Input Data File on page 47.

Using the module image table, the controller reads the two’s compliment binary converted input 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.

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17

Chapter 1	Overview

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; a sense connection that detects lead wire resistance; and a return connection. The signals are multiplexed to an A/D converter that reads the RTD or resistance value and the lead wire resistance.

Input

VA2

VA1

VA1

VA1

EXC

EXC0

CHN0

Current

TXD

AIN+1

SENSE0

Multiplexer

A/D

MCU

ASIC

AIN+2

RTN0

AIN-

A-GND

Vref

VREF

DC/DC

VS1

Power Supply

VA3

VA1

VS2

Channel Select

VA2

VA3

1

S-GND

A-GND

2

Channels 1…5 same as

3

channel 0 above.

4

5

BUS

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.

18	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Overview	Chapter 1

Module Field Calibration

The input module performs autocalibration when a channel is initially enabled. Autocalibration compensates for offset and gain drift of the A/D converter caused by temperature change within the module. An internal, high-precision, low drift voltage and system ground reference is used for this purpose. In addition, you can program the module to perform a calibration cycle once every 5 minutes. See Selecting Enable/Disable Cyclic Autocalibration (Word 6, Bit 0) on page 65 for information on configuring the module to perform periodic calibration.

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19

Chapter 1	Overview

Notes:

20	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Chapter 2

Before You Begin

Required Tools and

Equipment

What You Need To Do

Quick Start for Experienced Users

This chapter can help you to get started using the 1769-IR6 module. We base the procedures here on the assumption that you have an understanding of Allen-Bradley controllers. You should understand electronic process control and be able to interpret the ladder logic instructions required to generate the electronic signals that control your application.

Because it is a start-up guide for experienced users, this chapter does not contain detailed explanations about the procedures listed. It does, however, reference other chapters in this book where you can get more information about applying the procedures described in each step.

If you have any questions or are unfamiliar with the terms used or concepts presented in the procedural steps, always read the referenced chapters and other recommended documentation before trying to apply the information.

Have the following tools and equipment ready:

·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™)

This chapter covers:

1.Ensuring that your power supply is adequate

2.Attaching and locking the module

3.Wiring the module

4.Configuring the module

5.Going through the startup procedure

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21

Chapter 2 Quick Start for Experienced Users

6. Monitoring module operation

Step 1:	Ensure that your 1769 system power supply(1) has sufficient current output to	Reference
	support your system configuration.
		Chapter 3
		(Installation and Wiring)

The modules maximum current draw is shown below.

5V DC		24V DC
100 mA		45 mA
TIP	The module cannot be located more than 8 modules away
	from the 1769 system power supply.

(1)The system power supply could be a 1769-PA2, -PB2, -PA4, -PB4, or the internal power supply of a MicroLogix 1500 packaged controller.

.

Step 2:	Attach and lock the module.				Reference
					Chapter 3
					(Installation and Wiring)
			TIP	The modules can be panel or DIN rail mounted. Modules
				can be assembled before or after mounting.
				ATTENTION: Remove power before removing or
				inserting this module. When you remove or insert a
				module with power applied, an electrical arc may occur.

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Quick Start for Experienced Users	Chapter 2

3

4

2 1

6

1 5

1.Check that the bus lever of the module to be installed is in the unlocked (fully right) position.

2.Use the upper and lower tongue-and-groove slots (1) to secure the modules together (or to a controller).

3.Move the module back along the tongue-and-groove slots until the bus connectors (2) line up with each other.

4.Push the bus lever back slightly to clear the positioning tab (3). Use your fingers or a small screwdriver.

5.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.

ATTENTION: When attaching I/O modules, it is very important that the bus connectors are securely locked together to ensure proper electrical connection.

6.Attach an end cap terminator (5) to the last module in the system by using the tongue-and-groove slots as before.

7.Lock the end cap bus terminator (6).

IMPORTANT A 1769-ECR or 1769-ECL right or left end cap respectively must be used to terminate the end of the bus.

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23

Chapter 2 Quick Start for Experienced Users

Step 3:

Wire the module.

Reference

Chapter 3

(Installation and Wiring)

Follow the guidelines below when wiring the module.

General

·This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded.

·Power and input wiring must be in accordance with Class I, Division 2 wiring methods (Article 501-4(b) of the National Electric Code NFPA70), and in accordance with the authority having jurisdiction.

·Channels are isolated from one another by ±10V DC maximum.

·Route field wiring away from any other wiring and as far as possible from sources of electrical noise, such as motors, transformers, contactors, and AC devices. In general, allow at least 15.2 cm (6 in.) of separation for every 120V of power.

·Routing field wiring in a grounded conduit can reduce electrical noise.

·If field wiring must cross AC or power cables, ensure that they cross at right angles.

·To ensure optimum accuracy, limit overall cable impedance by keeping your cable as short as possible. Locate the I/O system as close to your sensors or actuators as your application will permit.

·Use Belden shielded, twisted-pair wire to ensure proper operation and high immunity to electrical noise. See the table below for recommended types.

Configuration	Recommended Cable
2-wire	Belden 9501 or equivalent
3-wire	Belden 9533 or equivalent
less than 30.48 m (100 ft)
3-wire	Belden 83503 or equivalent
greater than 30.48 m (100 ft) or high humidity conditions

·Keep cable shield connection to ground as short as possible.

·Under normal conditions, the drain wire and shield junction should be connected to earth ground, via a panel or DIN rail mounting screw at the 1769-IR6 module end.

·If noise persists for a device, try grounding the opposite end of the cable. (You can only ground one end at a time.)

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Quick Start for Experienced Users	Chapter 2

·Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1, for additional information.

RTD Wiring Considerations

·The module requires three wires to compensate for lead resistance error.

·If using a 3-wire configuration for module connections, select cable to ensure that lead wire resistances match as closely as possible. Consider the following:

–To ensure temperature or resistance value accuracy, the resistance difference of the cable lead wires must be less than or equal to 0.01 Ω..

–Keep lead wire resistance as small as possible and less than 25 Ω .

–Use quality cable that has a small tolerance impedance rating and consistent impedance throughout its length.

–Use a heavy gauge lead wire with less resistance per foot.

Terminal Connections

1769-IR6

EXC 0

EXC 3

SENSE 0

SENSE 3

RTN 0

RTN 3

EXC 1

EXC 4

SENSE 1

SENSE 4

RTN 1

RTN 4

EXC 2

EXC 5

SENSE 2

SENSE 5

RTN 2

RTN 5

For examples of RTD and resistance device wiring see Wiring RTDs on page 41 and Wiring Resistance Devices (Potentiometers) on page 42.

Step 4:

Configure the module.

Reference

Chapter 4

(Module Data, Status, and

Channel Configuration)

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25

Chapter 2 Quick Start for Experienced Users

The configuration file is typically modified using the programming software configuration screen as shown below. It can also be modified through the control program, if supported by the controller. See the configuration file chart on Configuration Data File on page 50.

TIP	The configuration default is to enable an analog channel.
	For improved system performance, disable any unused
	channels.

Step 5:

Go through the startup procedure.

Reference

Chapter 5

(Module Diagnostics and

Troubleshooting)

1.Apply power to the system.

2.Download your program, which contains the module configuration settings, to the controller.

3.Put the controller into Run mode. During a normal start-up, the module status indicator turns on.

TIP	If the module status indicator does not turn on, cycle
	power. If the condition persists, contact your local
	distributor or Rockwell Automation for assistance.

Step 6:

Monitor the module status to check if the module is operating correctly

Reference

Chapter 5

(Module Diagnostics and

Troubleshooting)

Module and channel configuration errors are reported to the controller. These errors are typically reported in the controller’s I/O status file. Channel status data is also reported in the module’s input data table, so these bits can be used in your control program to flag a channel error.

26	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012

Chapter 3

Installation and Wiring

Compliance to European Union Directives

This chapter tells you how to:

·determine the power requirements for the modules

·avoid electrostatic damage

·install the module

·wire the module’s terminal block

This product is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.

EMC Directive

The 1769-IR6 module is tested to meet Council Directive 89/336/EEC Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file:

·EN 50081-2

EMC – Generic Emission Standard, Part 2 - Industrial Environment

·EN 50082-2

EMC – Generic Immunity Standard, Part 2 - Industrial Environment

This product is intended for use in an industrial environment.

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27

Chapter 3 Installation and Wiring

Low Voltage Directive

Power Requirements

This product is tested to meet Council Directive 73/23/EEC Low Voltage, by applying the safety requirements of EN 61131-2 Programmable Controllers, Part 2 – Equipment Requirements and Tests.

The module receives +5V DC and 24V DC power from the system power supply through the CompactBus interface.

The maximum current drawn by the module is shown in the table below.

5V DC	24V DC
100 mA	45 mA

General Considerations

TIP	When you configure your system, ensure that the total
	current draw of all the modules does not exceed the
	maximum current output of the system power supply.

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 2(1)) and to circuits not exceeding Over Voltage Category II(2) (IEC 60664-1).(3)

(1)Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected.

(2)Over 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.

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Installation and Wiring	Chapter 3

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only. The following WARNING statement applies to use in hazardous locations.

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.

·This product must be installed in an enclosure.

·All wiring must comply with N.E.C. article 501-4(b).

Prevent Electrostatic Discharge

ATTENTION: 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 box.

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29

Chapter 3 Installation and Wiring

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

·Electrical arcing causes excessive wear to contacts on both the module and its mating connector and may lead to premature failure.

Selecting a Location

Reducing Noise

Most applications require installation in an industrial enclosure to reduce the effects of electrical interference. RTD inputs are highly susceptible to electrical noise. Electrical noise coupled to the RTD inputs will reduce the performance (accuracy) of the module.

Group your modules to minimize adverse effects from radiated electrical noise and heat. Consider the following conditions when selecting a location for the 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 wiring away from any high voltage I/O wiring.

30	Rockwell Automation Publication 1769-UM005B-EN-P - March 2012