Rockwell Automation 1769-IR6 User Manual
User Manual
Compact I/O RTD/Resistance Input Module
Catalog Number 1769-IR6
Important User Information
IMPORTANT
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
your local Rockwell Automation® sales office or online at http://www.rockwellautomation.com/literature/
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.
available from
) describes some
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.
Identifies information that is critical for successful application and understanding of the product.
Allen-Bradley, Rockwell Software, Rockwell Automation, Compact I/O, CompactLogix, MicroLogix, RSLo gix 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
This manual contains new and updated information. Changes throughout this
revision are marked by change bars, as shown to the right of this paragraph.
New and Updated Information
This table contains the changes made to this revision.
Top ic Pag e
Updated RTD accuracy and temperature drift values 14
Updated module accuracy values 79
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 3
Summary of Changes
Notes:
4 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Table of Contents
Preface
Overview
Quick Start for Experienced
Users
Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Conventions Used in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 1
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
Chapter 2
Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
What You Need To Do. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Installation and Wiring
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
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 5
Table of Contents
Wiring RTDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Wiring Resistance Devices (Potentiometers) . . . . . . . . . . . . . . . . . . . . 42
Chapter 4
Module Data, Status, and
Channel Configuration
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
6 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Chapter 5
Table of Contents
Diagnostics and
Troubleshooting
Module Addressing and
Programming with MicroLogix
1500 and RSLogix 500
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
Appendix A
Module Addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
1769-IR6 Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Configuring the 1769-IR6 in a MicroLogix 1500 System . . . . . . . . . . . . 93
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
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 7
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
Table of Contents
Notes:
8 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Read this preface to familiarize yourself with the rest of the manual.
Preface
Who Should Use This Manual
How to Use This Manual
Conventions Used in This Manual
Additional Resources
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,
publication 1769-TD006
Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1
Product Certifications website, http://www.ab.com
You can view or download publications at
http:/www.rockwellautomation.com/literature/
technical documentation, contact your local Allen-Bradley distributor or
Rockwell Automation sales representative.
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 9
Specifications of all 1769 Compact I/O modules
Provides general guidelines for installing a Rockwell Automation
industrial system.
Provides declarations of conformity, certificates, and other
certification details.
. To order paper copies of
Preface
Notes:
10 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Chapter
IMPORTANT
1
Overview
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
General Description
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 over- and under-range detection and indication.
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
more information.
, for
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 11
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
Table 1 - RTD Specifications
Overview Chapter 1
RTD Type
(1)
Temperature Range Using
0.5 mA Excitation
Temperature Range Using
1.0 mA Excitation
Maximum
Scaled
Resolution
Maximum
Scaled
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
(2)
618
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)
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.
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 13
Chapter 1 Overview
IMPORTANT
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
(25 °C with 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)
Maximum Scaled Accuracy
(0…60 °C with Calibration)
Maximum Temperature Drift
(from 25 °C without
Calibration)
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
Table 3 - Resistance Device Specifications
Overview Chapter 1
Resistance Device Compatibility
The following table lists the specifications for the resistance devices that you
can use with the module.
Resistance
Device
Ty pe
150 Ω 0…150 Ω 0…150 Ω ±0.15 Ω ±0.007 Ω/°C
500 Ω 0…500 Ω 0…500 Ω ±0.5 Ω ±0.023 Ω/°C
1000 Ω 0…1000 Ω 0…1000 Ω ±1.0 Ω ±0.043 Ω/°C
3000 Ω 0…3000 Ω Not allowed ±1.5 Ω ±0.072 Ω/°C
(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).
Resistance Range
(0.5 mA Excitation)
Resistance Range
(1.0 mA Excitation)
Accuracy
(1)
Temperature Drift Resolution Repeatability
0.01 Ω ±0.04 Ω
(±0.013 Ω/°F)
0.1 Ω ±0.2 Ω
(±0.041 Ω/°F)
0.1 Ω ±0.2 Ω
(±0.077 Ω/°F)
0.1 Ω ±0.2 Ω
(±0.130 Ω/°F)
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 15
Chapter 1 Overview
10a
10b
4
10
2b
3
2a
1
5a
9
5b
6
7a
7b
8b
7b
8a
7a
1769-IR6
DANGER
Do Not Remove RTB Under Power
Unless Area is Non-Hazardous
Ensure Adjacent
Bus Lever is Unlatched/Latched
Before/After
Removing/Inserting Module
S
E
NS
E
3
E
X
C
5
R
T
N
5
R
T
N
2
R
T
N
3
-
S
E
N
S
E
4
R
T
N
4
S
E
N
S
E
5
E
X
C
3
E
X
C
0
R
TN
0
S
E
N
S
E
1
E
X
C
2
S
E
N
S
E
0
E
X
C
1
R
TN
1
S
E
N
S
E
2
E
X
C
4
OK
Analog
OK
Analog
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.
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
16 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
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
Overview Chapter 1
General Diagnostic Features
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
details on power-up and channel diagnostics.
, for
System Overview
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.
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 17
Chapter 1 Overview
VA2
A-GND
VA1 VA 1
AIN+1
AIN+2
AIN-
VREF
Vref
VA3
VA1
TXD
VA1
VA 2
VA 3
A-GND
VS2
VS1
S-GND
1
2
3
4
5
Input
EXC0
SENSE0
RTN0
CHN0
Multiplexer
EXC
Current
A/D MCU ASIC
BUS
Channel Select
DC/DC
Power Supply
Channels 1…5 same as
channel 0 above.
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.
18 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
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.
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.
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 19
Chapter 1 Overview
Notes:
20 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Quick Start for Experienced Users
Chapter
2
Before You Begin
Required Tools and Equipment
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™)
What You Need To Do
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
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 21
Chapter 2 Quick Start for Experienced Users
TIP
TIP
6. Monitoring module operation
Step 1:
Ensure that your 1769 system power supply
support your system configuration.
(1)
has sufficient current output to
Reference
Chapter 3
(Installation and Wiring)
The modules maximum current draw is shown below.
5V DC 24V DC
100 mA 45 mA
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)
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.
22 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Quick Start for Experienced Users Chapter 2
6
5
4
3
1
1
2
IMPORTANT
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).
A 1769-ECR or 1769-ECL right or left end cap
respectively must be used to terminate the end of the
bus.
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 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
less than 30.48 m (100 ft)
3-wire
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.)
24 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Belden 9533 or equivalent
Belden 83503 or equivalent
Quick Start for Experienced Users Chapter 2
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 5
RTN 2
1769-IR6
· 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
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
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 25
Chapter 4
(Module Data, Status, and
Channel Configuration)
Chapter 2 Quick Start for Experienced Users
TIP
TIP
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.
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.
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
Installation and Wiring
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
Chapter
3
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.
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.
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 27
Chapter 3 Installation and Wiring
TIP
Low Voltage Directive
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.
Power Requirements
General Considerations
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
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
(1)
use in clean, dry environments (Pollution degree 2
(2)
exceeding Over Voltage Category II
(IEC 60664-1).
) and to circuits not
(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.
28 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
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.
Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 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
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