Rockwell Automation 1769-IF16V User Manual
Compact High-density Analog Input Modules
(Catalog Numbers
User Manual
1769-IF16C, 1769-IF16V
)
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
from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.com
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.
available
) describes
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.
IMPORTANT
ATTENTION
Identifies information that is critical for successful application and understanding of the product.
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.
Rockwell Automation, Allen-Bradley, TechConnect, CompactLogix, Compact I/O, ControlLogix, MicroLogix 1500, RSLogix 5000, RSLogix 500, RSNetWorx, RSNetWorx for DeviceNet, and RSLinx are
trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Overview
Installation and Wiring
Table of Contents
Preface
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
About this Publication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Who Should Use This Publication . . . . . . . . . . . . . . . . . . . . . 7
Additional Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Module Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Module Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Hazardous Location Considerations . . . . . . . . . . . . . . . . 14
Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . 14
Remove Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Reduce Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Protecting the Circuit Board from Contamination. . . . . . . 15
Assemble the Compact I/O System . . . . . . . . . . . . . . . . . . . 16
Mounting the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Minimum Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mount to a Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mount to a DIN Rail. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Replace a Single Module Within a System . . . . . . . . . . . . . . 19
Grounding the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
System Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Effect of Transducer/Sensor and Cable Length
Impedance on Voltage Input Accuracy . . . . . . . . . . . . . . 21
Label the Terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Remove the Finger-safe Terminal Block . . . . . . . . . . . . . . . . 23
Wire the Finger-safe Terminal Block . . . . . . . . . . . . . . . . . . 23
Wire Size and Terminal Screw Torque . . . . . . . . . . . . . . 24
Wire the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Chapter 3
Module Data, Status, and Channel
Configuration
3Publication 1769-UM018A-EN-P - October 2008 3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Module Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Input Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Output Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table of Contents
Input Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Time Stamp Value (Word 16) . . . . . . . . . . . . . . . . . . . . . 32
General Status Bits (S0…S15) . . . . . . . . . . . . . . . . . . . . . 32
Low Alarm Flag Bits (L0 …L15) . . . . . . . . . . . . . . . . . . . 32
High Alarm Flag Bits (H0…H15). . . . . . . . . . . . . . . . . . . 32
Over-Range Flag Bits (O0…O15) . . . . . . . . . . . . . . . . . . 33
Under-Range Flag Bits (U0…U15). . . . . . . . . . . . . . . . . . 33
Output Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Configuration Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Enable/Disable Channel (EC) . . . . . . . . . . . . . . . . . . . . . 39
Input Filter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Input Type/Range Selection . . . . . . . . . . . . . . . . . . . . . . 41
Input Data Selection Formats . . . . . . . . . . . . . . . . . . . . . 41
Real Time Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Time Stamping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Process Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Alarm Deadband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Module Diagnostics and
Troubleshooting
Chapter 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Status Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Activate Devices When Troubleshooting . . . . . . . . . . . . . 47
Stand Clear of the Machine. . . . . . . . . . . . . . . . . . . . . . . 48
Program Alteration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Safety Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Power Cycle Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Channel Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Out-of-range Detection . . . . . . . . . . . . . . . . . . . . . . . . . 49
Process Alarm Detection . . . . . . . . . . . . . . . . . . . . . . . . 49
Open-circuit Detection. . . . . . . . . . . . . . . . . . . . . . . . . . 49
Non-critical vs. Critical Module Errors . . . . . . . . . . . . . . . . . 50
Module Error Definition Table . . . . . . . . . . . . . . . . . . . . . . . 50
Module Error Field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Extended Error Information Field . . . . . . . . . . . . . . . . . . 51
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Invalid Input Range Selected . . . . . . . . . . . . . . . . . . . . . 55
Invalid Input Filter Selected . . . . . . . . . . . . . . . . . . . . . . 55
Invalid Input Format Selected. . . . . . . . . . . . . . . . . . . . . 56
Alarm Not Enabled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Invalid Alarm Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Invalid Real Time Sample Value . . . . . . . . . . . . . . . . . . . 57
Module Inhibit Function . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . . 57
4 Publication 1769-UM018A-EN-P - October 2008
Specifications
Module Addressing and
Configuration with MicroLogix
1500 Controller
Configuration Using the RSLogix
5000 Generic Profile for
CompactLogix Controllers
Table of Contents
Appendix A
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Input Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Appendix B
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Module Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Module Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Configure Analog I/O Modules in a MicroLogix 1500 System 64
Appendix C
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Add the Module to Your Project . . . . . . . . . . . . . . . . . . . . . 69
Configure Each I/O Module. . . . . . . . . . . . . . . . . . . . . . . . . 72
Two’s Complement Binary
Numbers
Appendix D
Positive Decimal Values . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Negative Decimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Glossary
Index
Publication 1769-UM018A-EN-P - October 2008 5
Table of Contents
6 Publication 1769-UM018A-EN-P - October 2008
Preface
Introduction
About this Publication
Read this preface to familiarize yourself with the rest of the manual.
Topic Page
About this Publication 7
Who Should Use This Publication 7
Additional Resources 8
Conventions 8
This manual is a guide for using Compact High Density Analog Input
Modules, catalog numbers 1769-IF16C and 1769-IF16V. It describes the
procedures you use to configure, operate, and troubleshoot your
module.
For detailed information on related topics like programming your
CompactLogix or MicroLogix controller, or DeviceNet adapter, or for
information on CompactLogix components, see the list of Additional
Resources on page 8.
Who Should Use This Publication
Use this manual if you are responsible for designing, installing,
programming, or troubleshooting control systems that use Compact
I/O modules.
7Publication 1769-UM018A-EN-P - October 2008 7
Preface
Additional Resources
These documents contain additional information about control
systems that use Compact I/O modules.
Resource Description
MicroLogix 1500 User Manual, publication 1764-UM001
DeviceNet Adapter User Manual, publication 1769-UM001
CompactLogix User Manual, publication 1769-UM007
CompactLogix System User Manual, publication 1769-UM011
Compact I/O Selection Guide, publication 1769-SG002
MicroLogix Programmable Controllers Selection Guide,
publication 1761-SG001
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
A user manual containing information on how to install, use and
program your MicroLogix 1500 controller.
A user manual containing information on how to install, and use your
1769-ADN DeviceNet adapter.
A user manual containing information on how to install, use and
program your 1769-L20 and -L30 CompactLogix controllers.
A user manual containing information on how to install, use and
program your 1769-L31, -L32C, -L32E, -L35CR and -L35E CompactLogix
controllers.
An overview of 1769 Compact I/O modules.
An overview of the MicroLogix 1500 System, including the 1769
Compact I/O system.
In-depth information on grounding and wiring Allen-Bradley
programmable controllers.
You can view or download publications at
http://literature.rockwellautomation.com
technical documentation, contact your local Rockwell Automation
distributor or sales representative.
. To order paper copies of
Conventions
These conventions are used throughout this manual:
• Bulleted lists, such as this one, provide information, not
procedural steps.
• Numbered lists provide sequential steps or hierarchical
information.
• Bold type is used for emphasis.
8 Publication 1769-UM018A-EN-P - October 2008
Introduction
Overview
Topic Page
Module Description 9
System Overview 11
Module Operation 11
Chapter
1
Module Description
The modules convert and digitally store analog data for retrieval by
controllers, such as the CompactLogix or MicroLogix 1500 controllers.
The modules provide the following input types and ranges.
Normal and Full Ranges
Cat. No. Normal Operating Input Range Full Module Range
1769-IF16V ±10V DC ± 10.5V DC
1…5V DC 0.5…5.25V DC
0…5V DC -0.5…+5.25V DC
0…10V DC -0.5…+10.5V DC
1769-IF16C 0…20 mA 0…21 mA
4…20 mA 3.2…21 mA
The data can be configured as:
• engineering Units.
• scaled-for-PID.
• percent range.
• raw/proportional data.
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.
9Publication 1769-UM018A-EN-P - October 2008 9
Chapter 1 Overview
Hardware Features
5a
7a
12a
OK
Analog
10a
10
10b
DANGER
Do Not Remove RTB Under Power
Unless Area is Non-Hazardous
IN0+
IN1+
IN2+
IN3+
IN4+
IN5+
IN6+
IN7+
COM
COM
IN8+
IN9+
IN10+
IN11+
IN12+
IN13+
IN14+
IN15+
Ensure Adjacent
Bus Lever is Unlatched/Latched
Before/After
Removing/Inserting Module
1769-IF16C
3
4
8a
7a
OK
Analog
2b
7a
12a
OK
Analog
10a
10
10b
DANGER
Do Not Remove RTB Under Power
Unless Area is Non-Hazardous
IN0+
IN1+
IN2+
IN3+
IN4+
IN5+
IN6+
IN7+
COM
COM
IN8+
IN9+
IN10+
IN11+
IN12+
IN13+
IN14+
IN15+
Ensure Adjacent
Bus Lever is Unlatched/Latched
Before/After
Removing/Inserting Module
1769-IF16V
3
4
8a
7a
OK
Analog
2b
5a
9
5b
9
6
5b
6
7b
7b
8b
7b
8b
Item Description
1 Bus lever (with locking function)
2a Upper-panel mounting tab
2b Lower-panel mounting tab
3 Module status LEDs
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 for user identification tags
10 Removable terminal block (RTB) with finger-safe cover
10a RTB upper retaining screw
10b RTB lower retaining screw
7b
10 Publication 1769-UM018A-EN-P - October 2008
Overview Chapter 1
System Overview
The modules communicate to the controller through the bus interface.
The modules also receive 5 and 24V DC power through the bus
interface.
You can install as many analog modules as your power supply can
support. However, the modules may not be located more than eight
modules away from the system power supply.
Determine Power Supply Distance
Adapter
Compact I/O
or I/O Communication
CompactLogix Controller
Compact I/O
Compact I/O
System Power Supply
Compact I/O
Compact I/O
1123432
End Cap
Compact I/O
Power Supply Distance
or
Module Operation
MicroLogix 1500 Controller
with Integrated System
Power Supply
Compact I/O
Compact I/O
1
234
Compact I/O
End Cap
Compact I/O
Power Supply Distance
When you cycle power, the modules perform a check of their internal
circuits, memory, and basic functions. During this time, the module
status OK indicator remains off. If no faults are found during
power-cycle diagnostics, the module status OK indicator is turned on.
After power-cycle checks are complete, the modules wait for valid
channel configuration data. If an invalid configuration is detected, the
modules generate a configuration error. Once a channel is properly
configured and enabled, it begins the analog-to-digital conversion
process.
Each time a channel is read, the converted analog data value is tested
for an over-range or under-range condition. In addition, the modules
support user-configured high and low alarm condition tests for each
channel. If any of these conditions are detected, unique bits are set in
the channel status words.
Publication 1769-UM018A-EN-P - October 2008 11
Chapter 1 Overview
The channel status words are described in the Input Data File on
page 31.
The controller reads the two’s complement binary converted analog
data from the modules. This typically occurs at the end of the program
scan or when commanded by the control program. If the controller
and the modules determine that the bus data transfer was made
without error, the data is used in your control program.
No field calibration is required.
12 Publication 1769-UM018A-EN-P - October 2008
Introduction
Installation and Wiring
Topic Page
General Considerations 13
Assemble the Compact I/O System 16
Mounting the Module 17
Replace a Single Module Within a System 19
Grounding the Module 20
System Wiring Guidelines 21
Label the Terminals 23
Remove the Finger-safe Terminal Block 23
Chapter
2
General Considerations
Wire the Finger-safe Terminal Block 23
Wire the Modules 25
The Compact I/O system 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
Over Voltage Category II
(2)
(IEC 60664-1).
(1)
) and to circuits not exceeding
(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.
13Publication 1769-UM018A-EN-P - October 2008 13
Chapter 2 Installation and Wiring
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 attention
statement applies to use in hazardous locations.
ATTENTION
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.
• Use a static-safe work station, if available.
• When it is not in use, keep the module in its static-shield box.
14 Publication 1769-UM018A-EN-P - October 2008
Remove Power
Installation and Wiring Chapter 2
ATTENTION
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.
Reduce 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.
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 module. 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.
Protecting the Circuit Board from Contamination
The printed circuit boards of the analog modules must be protected
from dirt, oil, moisture, and other airborne contaminants. To protect
these boards, the system must be installed in an enclosure suitable for
the environment. The interior of the enclosure should be kept clean
and the enclosure door should be kept closed whenever possible.
Publication 1769-UM018A-EN-P - October 2008 15
Chapter 2 Installation and Wiring
Assemble the Compact I/O System
2
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 on page 18, or Mount to a DIN Rail on page 19. To work
with a system that is already mounted, see Replace a Single Module
Within a System on page 19.
3
4
1
6
1
5
1. Disconnect power.
2. Check that the bus lever of the module to be installed is in the
unlocked (fully right) position.
3. Use the upper and lower tongue-and-groove slots (1) to secure
the modules together (or to a controller).
4. Move the module back along the tongue-and-groove slots until
the bus connectors (2) line up with each other.
5. Use your fingers or a small screwdriver to push the bus lever
back slightly to clear the positioning tab (3).
16 Publication 1769-UM018A-EN-P - October 2008
Installation and Wiring Chapter 2
6. To allow communication between the controller and module,
move the bus lever fully to the left (4) until it clicks.
Make sure it is locked firmly in place.
Mounting the Module
ATTENTION
When attaching I/O modules, it is very important that
the bus connectors are securely locked together to be
sure of proper electrical connection.
7. Attach an end cap terminator (5) to the last module in the
system by using the tongue-and-groove slots as before.
8. Lock the end cap bus terminator (6).
IMPORTANT
A 1769-ECR or 1769-ECL right or left end cap must be used to
terminate the end of the bus.
ATTENTION
During panel or DIN rail mounting of all devices, be sure that all
debris (that is, metal chips or wire strands) is kept from falling
into the module. Debris that falls into the module could cause
damage when you cycle power.
Minimum Spacing
Maintain spacing from enclosure walls, wireways, or adjacent
equipment. Allow 50 mm (2 in.) of space on all sides for adequate
ventilation.
Space Requirements
Top
Side Side
Publication 1769-UM018A-EN-P - October 2008 17
Host Controller
Compact I/O
Bottom
Compact I/O
Compact I/O
Compact I/O
Compact I/O
End Cap
Chapter 2 Installation and Wiring
Mount to a Panel
Mount the module to a panel using two screws per module. Use M4
or #8 panhead screws. Mounting screws are required on every
module.
Panel Mounting Using the Dimensional Template
Locate holes every 17.5 mm (0.689 in.) to allow for a mix of
single-wide and one-and-a-half-wide modules (for example, the
1769-OA16 module).
Spacing for one-and-a-half-wide modules 52.5 mm (2.067 in.).
Spacing for single-wide modules 35 mm (1.378 in.).
Refer to host controller documentation for this dimension.
Overall hole spacing tolerance:
±0.4 mm (0.016 in.).
l Mounting
Host Controller
Panel Mounting Using the Modules as a Template
This procedure lets you to use the assembled modules as a template
for drilling holes in the panel. If you have sophisticated
panel-mounting equipment, you can use the dimensional template
provided. Due to module mounting hole tolerance, it is important to
follow these procedures.
1. On a clean work surface, assemble no more than three modules.
2. Using the assembled modules as a template, carefully mark the
center of all module-mounting holes on the panel.
3. Return the assembled modules to the clean work surface,
including any previously mounted modules.
4. Drill and tap the mounting holes for the recommended M4 or #8
screw.
5. Place the modules back on the panel, and check for proper hole
alignment.
18 Publication 1769-UM018A-EN-P - October 2008
Installation and Wiring Chapter 2
6. Attach the modules to the panel using the mounting screws.
Replace a Single Module Within a System
TIP
7. Repeat steps 1…6 for any remaining modules.
If mounting more modules, mount only the last one of this group
and put the others aside. This reduces remounting time during
drilling and tapping of the next group.
Mount to a DIN Rail
The module can be mounted using the following DIN rails:
35 x 7.5 mm (EN 50 022 - 35 x 7.5) or 35 x 15 mm (EN 50 022 - 35 x
15).
Before mounting the module on a DIN rail, close the DIN rail latches.
Press the DIN rail mounting area of the module against the DIN rail.
The latches will momentarily open and lock into place.
The module can be replaced while the system is mounted to a panel
(or DIN rail). Follow these steps in order.
1. Remove power.
ATTENTION
2. On the module to be removed, remove the upper and lower
mounting screws from the module or open the DIN latches
using a flat-blade or Phillips screwdriver.
3. Move the bus lever to the right to disconnect (unlock) the bus.
4. On the right-side adjacent module, move its bus lever to the
right (unlock) to disconnect it from the module to be removed.
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.
Publication 1769-UM018A-EN-P - October 2008 19
Chapter 2 Installation and Wiring
5. Gently slide the disconnected module forward.
If you feel excessive resistance, check that the module has been
disconnected from the bus, and that both mounting screws have
been removed or DIN latches opened.
Grounding the Module
TIP
6. Before installing the replacement module, be sure that the bus
lever on the module to be installed and on the right-side
adjacent module are in the unlocked (fully right) position.
7. Slide the replacement module into the open slot.
8. Connect the modules together by locking (fully left) the bus
levers on the replacement module and the right-side adjacent
module.
9. Replace the mounting screws or snap the module onto the DIN
rail.
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. Refer to Industrial
Automation Wiring and Grounding Guidelines, Allen-Bradley
publication 1770-4.1
It may be necessary to rock the module slightly
from front to back to remove it, or, in a
panel-mounted system, to loosen the screws of
adjacent modules.
, for additional information.
20 Publication 1769-UM018A-EN-P - October 2008
Installation and Wiring Chapter 2
System Wiring Guidelines
Consider the following when wiring your system:
• All module commons (COM) are connected in the analog
module.
• The analog common (COM) is not connected to earth ground
inside the module.
• Channels are not isolated from each other.
• 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 8761, or equivalent, shielded wire.
• Under normal conditions, the drain wire and shield junction
must be connected to earth ground via a panel or DIN rail
mounting screw at the analog I/O module end.
(1)
Keep shield
connection to ground as short as possible.
• If multiple power supplies are used with analog inputs, the
power supply commons must be connected.
• The modules do not provide loop power for analog inputs. Use
a Class 2 power supply that matches the input transmitter
specifications.
• Voltages on IN+ terminals of the modules must be within
±10V DC of module common (COM).
Effect of Transducer/Sensor and Cable Length Impedance on
Voltage Input Accuracy
For voltage inputs, the length of the cable used between the
transducer/sensor and the module can affect the accuracy of the data
provided by the module.
(1) In environments where high-frequency noise may be present, it may be necessary to directly ground cable
shields to earth at the module end and via a 0.1µF capacitor at the sensor end.
Publication 1769-UM018A-EN-P - October 2008 21
Chapter 2 Installation and Wiring
Voltage Input Accuracy
RcRs
+
Vs
V in
-
Rc
Ri
Where:
Rc = DC resistance of the cable (each conductor) depending on
cable length
Rs = Source impedance of analog transducer/sensor input
Ri = Impedance of the voltage input (1 MΩ for 1769-IF16V module)
Vs = Voltage source (voltage at the transducer/sensor input device)
Vin = Measured potential at the module input
%Ai = Percent added inaccuracy in a voltage-based system due
to source and cable impedance.
Ri Vs×[]
Vin
--------------------------------------------------------
=
[]
Rs 2 Rc×()Ri++
For example, for Belden 8761 two conductor, shielded cable:
Rc = 16 Ω/1000 ft
Rs = 0 (ideal source)
Table 2.1 Effect of Cable Length on Input Accuracy
Length of Cable,
m (ft)
50 (164) 2.625 0.000525%
100 (328) 5.25 0.00105%
200 (656) 10.50 0.0021%
300 (984) 15.75 0.00315%
DC Resistance of the Cable,
Rc (Ω)
%Ai 1
Vin
⎛⎞
---------
Vs
100×=
–
⎝⎠
Accuracy Impact at the
Input Module
As input source impedance (Rs) and/or resistance (DC) of the cable
(Rc) get larger, system accuracy decreases. If you determine that the
inaccuracy error is significant, implementing the following equation in
the control program can compensate for the added inaccuracy error
due to the impedance of the source and cable.
Rs 2 Rc×()Ri++[]
Vs Vin
--------------------------------------------------------
×=
Ri
TIP
22 Publication 1769-UM018A-EN-P - October 2008
For the 1769-IF16C module, source and cable impedance do not
impact system accuracy.
Installation and Wiring Chapter 2
Label the Terminals
Remove the Finger-safe Terminal Block
A removable, write-on label is provided with the module. Remove the
label from the door, mark the identification of each terminal with
permanent ink, and slide the label back into the door. Your markings
(ID tag) will be visible when the module door is closed.
When wiring field devices to the module, it is not necessary to remove
the terminal block. If you remove the terminal block, use the write-on
label on the side of the terminal block to identify the module slot
location and type. RTB position (for one-and-a-half size modules) can
be indicated by circling either the R for right side or L for left side.
Finger-safe Terminal Block
R L
SLOT # ____
MODULE TYPE _____
RoHS
To remove the terminal block, loosen the upper and lower retaining
screws. The terminal block will back away from the module as you
remove the screws. When replacing the terminal block, torque the
retaining screws to 0.46 N•m (4.1 in•lb).
Wire the Finger-safe Terminal Block
Upper Retaining Screw
Lower Retaining Screw
Wire the
Finger-safe
Terminal Block
When wiring the terminal block, keep the finger-safe cover in place.
Publication 1769-UM018A-EN-P - October 2008 23
Chapter 2 Installation and Wiring
1. Loosen the terminal screws to be wired.
2. Begin wiring at the bottom of the terminal block and move up.
3. Route the wire under the terminal pressure plate.
You can use the bare wire or a spade lug. The terminals accept a
6.35 mm (0.25 in.) spade lug.
TIP
The terminal screws are non-captive. Therefore, it is possible to
use a ring lug (maximum 1/4 in. o.d. with a 0.139 in. minimum
i.d. (M3.5)) with the module.
4. Tighten the terminal screw making sure the pressure plate
secures the wire.
Recommended torque when tightening terminal screws is
0.68 N•m (6 in•lb).
TIP
If you need to remove the finger-safe cover, insert a screwdriver
into one of the square, wiring holes and gently pry the cover off.
If you wire the terminal block with the finger-safe cover
removed, you will not be able to put it back on the terminal
block because the wires will be in the way.
Wire Size and Terminal Screw Torque
Each terminal accepts up to two wires.
Wire Type Wire Size Terminal Screw
Tor qu e
Solid Cu-90 °C (194 °F)
Stranded Cu-90 °C (194 °F)
24 Publication 1769-UM018A-EN-P - October 2008
0.325…2.080 mm
(22…14 AWG)
0.325…1.310 mm
(22…16 AWG)
2
0.68 N•m (6 in•lb) 0.46 N•m (4.1 in•lb)
2
•m (6 in•lb) 0.46 N•m (4.1 in•lb)
0.68 N
Retaining Screw
Torque
Wire the Modules
Installation and Wiring Chapter 2
ATTENTION
To prevent shock hazard, care should be taken when wiring the
module to analog signal sources. Before wiring any analog
module, disconnect power from the system power supply and
from any other source to the analog module.
After the analog module is properly installed, follow the wiring
procedure below. To ensure proper operation and high immunity to
electrical noise, always use Belden 8761 (shielded, twisted-pair) or
equivalent wire.
ATTENTION
When wiring an analog input, take care to avoid connecting a
voltage source to a channel configured for current input.
Improper module operation or damage to the voltage source
can occur.
Never connect a voltage or current source to an analog output
channel.
Belden 8761 Wire
Cut foil shield
and drain wire.
Signal Wire
Signal Wire
Drain Wire
Cable
Foil Shield
Signal Wire
To wire your module, follow these steps.
1. At each end of the cable, strip some casing to expose the
individual wires.
2. Trim the signal wires to 2-inch lengths. Strip about 5 mm
(3/16 in.) of insulation away to expose the end of the wire.
Signal Wire
ATTENTION
Be careful when stripping wires. Wire fragments that
fall into a module could cause damage when you cycle
power.
Publication 1769-UM018A-EN-P - October 2008 25
Chapter 2 Installation and Wiring
3. At one end of the cable, twist the drain wire and foil shield
together.
Under normal conditions, this drain wire and shield junction
must be connected to earth ground, via a panel or DIN rail
mounting screw at the analog I/O module end. Keep the length
of the drain wire as short as possible.
In environments where high frequency noise may be present, it
may be necessary to also ground the cable shields to earth via a
0.1 µF capacitor at the sensor end.
4. At the other end of the cable, cut the drain wire and foil shield
back to the cable, unless the sensor end of the cable requires
the shields to be connected to earth ground via the capacitor
described in step 3.
5. Connect the signal wires to the terminal block.
6. Connect the other end of the cable to the analog input or output
device.
7. Repeat steps 1…5 for each channel on the module.
Terminal Layout
IN0+
IN1+
IN2+
IN3+
IN4+
IN5+
IN6+
IN7+
COM
COM
IN8+
IN9+
IN10+
IN11+
IN12+
IN13+
IN14+
IN15+
26 Publication 1769-UM018A-EN-P - October 2008
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