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1746-UM005B, SLC 500 4-Channel Analog I/O Modules SLC 500
4-Channel Analog
I/O Modules
(Catalog Numbers 1746-NI4,
1746-NIO4I, 1746-NIO4V,
1746-NO4I, and 1746-NO4V)
User Manual 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.ab.com/manuals/gi) 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 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.
IMPORTANT
Identifies information that is critical for successful
application and understanding of the product.
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 recognize the consequence
SHOCK HAZARD
Labels may be located on or inside the drive to alert
people that dangerous voltage may be present.
BURN HAZARD
Labels may be located on or inside the drive to alert
people that surfaces may be dangerous temperatures. Publication 1746-UM005B-EN-P - June 2004
Summary of Changes
The information below summarizes the changes to this manual since
the last printing.
To help you find new and updated information in this release of the
manual, we have included change bars as shown to the right of this
paragraph.
For information on:
See:
SCP (scale with parameters) instruction available with SLC
5/05
6-3, 6-9, 6-15, 6-21
Change in Impedance to ANL Com specification for NI4
Series B module
A-1
Change in Impedance Channel to Channel specification for
NI4 Series B module
A-1
Change in Input Impedance specification for NI4 Series B
module
A-4
Change in resistance value for NI4 Series B module
Appendix D Publication 1746-UM005B-EN-P - June 2004
2 Summary of Changes i
Publication 1746-UM005B-EN-P - June 2004
Table of Contents
Preface
Who Should Use this Manual. . . . . . . . . . . . . . . . . . . . . . . P-1
Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . P-2
Common Techniques Used in this Manual . . . . . . . . . . . . . P-3
Your Questions or Comments on this Manual . . . . . . . . P-3
Chapter 1
Overview
How to Use Analog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Types of Analog Modules . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1746-NI4 Analog Input Module. . . . . . . . . . . . . . . . . . . 1-2
1746-NIO4I and NIO4V Analog Combination Modules. . 1-2
1746-NO4I and NO4V Analog Output Modules . . . . . . . 1-2
Chapter 2
Quick Start for Experienced Users
Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . 2-1
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Chapter 3
Installing and Wiring Your Analog
Module
European Union Directive Compliance . . . . . . . . . . . . . . . 3-1
EMC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Determining Your Power Requirements for a Modular
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Determining Your Power Requirements for a Fixed
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Configuring Your Module . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Switch Settings for the 1746NI4. . . . . . . . . . . . . . . . . . 3-5
Switch Settings for the 1746-NIO4I and -NIO4V. . . . . . . 3-5
External Power Switch for the 1746-NO4I and -NO4V . . 3-6
Choosing a Slot in the Chassis . . . . . . . . . . . . . . . . . . . . . . 3-6
Installing Your Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Removing the Analog Module Terminal Block. . . . . . . . 3-7
Wiring Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
System Wiring Guidelines. . . . . . . . . . . . . . . . . . . . . . . 3-9
Grounding Your Cable . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Determining the Cable Length . . . . . . . . . . . . . . . . . . . 3-10
Wiring the Analog Module. . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Labeling and Installing the Terminal Block. . . . . . . . . . . . . 3-12
Grounding the Foil Shields and Drain Wires. . . . . . . . . . . . 3-12
Wiring Schematics for 2, 3, and 4-Wire Analog Input
Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Wiring Schematic for Single-ended Analog Input
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Minimizing Electrical Noise on Analog Modules . . . . . . . . . 3-15 Publication 1746-UM005B-EN-P - June 2004
Table of Contents ii
Chapter 4
Module Operation and System
Considerations
Interface between the Module and the Processor . . . . . . . . 4-1
Entering Module ID Codes . . . . . . . . . . . . . . . . . . . . . . 4-1
Addressing Analog Modules . . . . . . . . . . . . . . . . . . . . . 4-2
Bit Level Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Processor Update of Analog Data . . . . . . . . . . . . . . . . . 4-5
Monitoring the Input and Output Data . . . . . . . . . . . . . 4-5
Converting Analog Input Data . . . . . . . . . . . . . . . . . . . 4-6
Converting Analog Output Data . . . . . . . . . . . . . . . . . . 4-7
System Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Safe State for Outputs . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Retentive Programming Option. . . . . . . . . . . . . . . . . . . 4-9
Retentive Analog Output Example . . . . . . . . . . . . . . . . 4-10
Non-Retentive Analog Output Example. . . . . . . . . . . . . 4-11
During a Mode Change or Power Cycle . . . . . . . . . . . . 4-11
Input Out-of-Range Detection. . . . . . . . . . . . . . . . . . . . 4-11
Response to Slot Disable . . . . . . . . . . . . . . . . . . . . . . . 4-13
Input Response to Slot Disable . . . . . . . . . . . . . . . . . . . 4-13
Output Response to Slot Disable . . . . . . . . . . . . . . . . . 4-13
Input Channel Filtering . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Chapter 5
Testing Your Module
Testing the SLC 500 System . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Start-up Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Inspect the Analog Module. . . . . . . . . . . . . . . . . . . . . . 5-2
Disconnect Prime Movers (Motion Devices) . . . . . . . . . 5-2
Power Up the SLC 500 System . . . . . . . . . . . . . . . . . . . 5-3
Testing Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Testing Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Chapter 6
Programming Examples
Addressing, Out-of-Range Detection, and Scaling of Analog
Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Calculating the Linear Relationship . . . . . . . . . . . . . . . . 6-2
Calculating the Out-of-Range Flag Using the Scale
Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Using Standard Math . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Using the Scale (SCL) Instruction . . . . . . . . . . . . . . . . . 6-6
Using Scale with Parameters (SCP) Instruction. . . . . . . . 6-7
Addressing and Scaling Outputs. . . . . . . . . . . . . . . . . . . . . 6-8
Calculating the Linear Relationship . . . . . . . . . . . . . . . . 6-8
Using Standard Math . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Using the Scale with Parameters