Rockwell Automation 1746-XXXX User Manual
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
IMPORTANT
ATTENTION
SHOCK HAZARD
BURN HAZARD
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.
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
• recognize the consequence
Labels may be located on or inside the drive to alert
people that dangerous voltage may be present.
Labels may be located on or inside the drive to alert
people that surfaces may be dangerous temperatures.
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
Change in Impedance to ANL Com specification for NI4
Series B module
Change in Impedance Channel to Channel specification for
NI4 Series B module
Change in Input Impedance specification for NI4 Series B
module
Change in resistance value for NI4 Series B module Appendix D
6-3, 6-9, 6-15, 6-21
A-1
A-1
A-4
Publication 1746-UM005B-EN-P - June 2004
2 Summary of Changes
Publication 1746-UM005B-EN-P - June 2004
Overview
Quick Start for Experienced Users
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
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
Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . 2-1
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Installing and Wiring Your Analog
Module
Chapter 3
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 1746–NI4. . . . . . . . . . . . . . . . . . 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
i Publication 1746-UM005B-EN-P - June 2004
Table of Contents ii
Module Operation and System
Considerations
Chapter 4
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
Testing Your Module
Programming Examples
Chapter 5
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
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 (SCP) Instruction. . . . . 6-12
Scaling Offset when > 32,767 or < -32,768 . . . . . . . . . . . . . 6-14
Calculating the Linear Relationship . . . . . . . . . . . . . . . . 6-14
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Maintenance and Safety
Specifications
Table of Contents iii
Calculating the Shifted Linear Relationship . . . . . . . . . . 6-15
Using Standard Math . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16
Using the Scale with Parameters (SCP) Instruction. . . . . 6-18
Scaling and Range Checking and Analog Inputs and
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Calculating the Linear Relationship . . . . . . . . . . . . . . . . 6-21
Using Standard Math Instructions . . . . . . . . . . . . . . . . . 6-22
Scaling and Range Checking of Analog Inputs and
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
Using SCL Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
Using the Scale with Parameters (SCP) Instruction. . . . . 6-26
Chapter 7
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Safety Considerations When Troubleshooting. . . . . . . . . . . 7-2
Appendix A
Analog Modules Specification . . . . . . . . . . . . . . . . . . . . . . A-1
General Specifications for NI4, NIO4I, NIO4V, NO4I, and
NO4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
General Analog Input Specifications for NI4, NIO4I, and
NIO4V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Current-Loop Input Specifications for NI4, NIO4I, and
NIO4V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Voltage Input Specifications for NI4, NIO4I, and NIO4V . . . A-4
Current Output Specifications for NIO4I and NO4I . . . . . . . A-5
Voltage Output Specifications for NIO4V and NO4V. . . . . . A-6
Two’s Complement Binary
Numbers
Optional Analog Input Software
Calibration
Module Input and Output Circuits
Appendix B
Positive Decimal Values . . . . . . . . . . . . . . . . . . . . . . . . A-1
Negative Decimal Values . . . . . . . . . . . . . . . . . . . . . . . A-2
Appendix C
Calibrating an Analog Input Channel . . . . . . . . . . . . . . . . . A-1
Calculating the Software Calibration . . . . . . . . . . . . . . . A-2
Appendix D
Index
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Table of Contents iv
Publication 1746-UM005B-EN-P - June 2004
Preface
Read this preface to familiarize yourself with the rest of the manual. It
provides information concerning:
• who should use this manual
• the purpose of this manual
• related documentation
• conventions used in this manual
• Rockwell Automation support
Who Should Use this Manual
Purpose of this Manual
Use this manual if you are responsible for designing, installing,
programming, or troubleshooting control systems that use SLC 500
4-Channel Analog I/O Modules.
You should have a basic understanding of electrical circuitry and
familiarity with relay logic. If you do not, obtain the proper training
before using this product.
This manual describes the procedures you use to install, wire, and
troubleshoot your 4-channel analog I/O module. This manual:
• explains how to install and wire your module
• gives you an overview of the SLC 500 programmable controller
system
Refer to your programming software user documentation for more
information on programming your SLC 500 programmable controller.
1 Publication 1746-UM005B-EN-P - June 2004
2 Preface
Related Documentation
The following documents contain additional information concerning
Rockwell Automation products. To obtain a copy, contact your local
Rockwell Automation office or distributor.
For Read this Document Document Number
In-depth information on the SLC Instruction Set. SLC 500 Instruction Set Reference Manual 1747-RM001
A description on how to install and use your Modular SLC 500
programmable controller.
A description on how to install and use your Fixed SLC 500
programmable controller.
A description on how to install 4-channel analog I/O modules SLC 500 4-Channel Analog I/O Modules
Information on reducing electrical noise. System Design for Control of Electrical
In-depth information on grounding and wiring Allen-Bradley®
programmable controllers.
A description of important differences between solid-state
programmable controller products and hard-wired electromechanical
devices.
An article on wire sizes and types for grounding electrical
equipment.
A glossary of industrial automation terms and abbreviations. Allen-Bradley Industrial Automation
SLC 500 Modular Hardware Style User
Manual
SLC 500 Fixed Hardware Style Installation &
Operation Manual
Installation Instructions
Noise
Allen-Bradley Programmable Controller
Grounding and Wiring Guidelines
Application Considerations for Solid-State
Controls
National Electrical Code - Published by the National Fire Protection
Association of Boston, MA.
Glossary
1747-UM011
1747-6.21
1746-IN008
GMC-RM001
1770-4.1
SGI-1.1
AG-7.1
Publication 1746-UM005B-EN-P - June 2004
If you would like a manual, you can:
• download an electronic version from the internet at:
– www.theautomationbookstore.com
– http://ab.com/manuals
• order a printed manual by:
– contacting your local distributor or Rockwell Automation
representative
– visiting www.theautomationbookstore.com
– calling 1.800.963.9548 (USA/Canada) or 001.330.725.1574
(Outside USA/Canada)
Preface 3
Common Techniques Used in this Manual
The following 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.
• Italic type is used for emphasis.
Your Questions or Comments on this Manual
If you find a problem with this manual, or you have any suggestions
for how this manual could be made more useful to you, please
contact us at the address below:
Rockwell Automation
Automation Control and Information Group
Technical Communication, Dept. A602V
P.O. Box 2086
Milwaukee, WI 53201-2086
Publication 1746-UM005B-EN-P - June 2004
4 Preface
Publication 1746-UM005B-EN-P - June 2004
Chapter
Overview
This chapter describes how analog is used and provides two
application examples of analog. The types of available analog
modules and their related specifications are also described.
1
How to Use Analog
Analog refers to the representation of numerical quantities by the
measurement of continuous physical variables. Analog applications
are present in many forms. The following application shows a typical
use of analog.
In this application the processor controls the amount of fluid placed in
a holding tank by adjusting the percentage of the valve opening. The
valve is initially open 100%. As the fluid level in the tank approaches
the preset point, the processor modifies the output to degrade closing
the valve 90%, 80%, adjusting the valve to maintain a set point.
Analog Output
Valve
Level Sensor
Analog Input
CPU
Analog I/O
Module
Types of Analog Modules
1 Publication 1746-UM005B-EN-P - June 2004
The following sections provide an overview of the various analog
modules.
1-2 Overview
1746-NI4 Analog Input Module
The 1746-NI4 Analog Input module contains 4 analog input channels
that are user selectable per channel for voltage or current to support a
variety of monitoring and controlling applications
1746-NIO4I and NIO4V Analog Combination Modules
The NIO4I and NIO4V Analog Combination I/O modules provide two
input and two output channels in a single slot module. The
1746-NIO4I module contains two current or voltage inputs (user
selectable per channel), and two current outputs. The 176-NIO4V
module contains two current or voltage inputs (user selectable per
channel) and two voltage outputs.
1746-NO4I and NO4V Analog Output Modules
The NO4I and NO4V Analog Output Modules provide 4 analog output
channels. The NO4I module contains four current outputs. The NO4V
module contains four voltage outputs. Both of these modules support
a variety of monitoring and controlling applications.
Catalog 1746- Input Channels per
Module
NI4 4 differential, voltage or
current selectable per
channel, not individually
isolated
NIO4I 2 differential, voltage or
current selectable per
channel, not individually
isolated
NIO4V 2 differential, voltage or
current selectable per
channel, not individually
isolated
NO4I NA 4 current outputs, not
Output Channels per
Module
NA 35 mA 85 mA NA
2 current outputs, not
individually isolated
2 voltage outputs, not
individually isolated
individually isolated
Backplane Current Draw External 24V dc Power
5V (max.) 24V (max.)
55 mA 145 mA NA
55 mA 115 mA NA
55 mA 195 mA 24 ±10% at 195 mA max.
Supply Tolerances
(21.6 to 26.4V dc)
(1)
NO4V NA 4 voltage outputs, not
individually isolated
(1) Required for some applications if SLC 24V power is not readily available.
For more specification information, refer to Appendix A.
Publication 1746-UM005B-EN-P - June 2004
55 mA 145 mA 24 ±10% at 145 mA max.
(21.6 to 26.4V dc)
(1)
Chapter
2
Quick Start for Experienced Users
This chapter can help you to get started using analog. The procedures
are based on the assumption that you have an understanding of SLC
500 products. 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.
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.
Required Tools and Equipment
This chapter:
• tells you what tools and equipment you need
• lists preliminary considerations
• describes when to configure the module
• explains how to install and wire the module
• discusses system power–up procedures
Have the following tools and equipment ready:
• small blade screwdriver
• an adequate length of communication cable (Belden™ 8761) for
your specific application. (See chapter 3, Installing and Wiring
Your Analog Module for maximum cable distances.)
• programming equipment
1 Publication 1746-UM005B-EN-P - June 2004
2-2 Quick Start for Experienced Users
Procedures
1. Check the contents of shipping box. Reference
Unpack the shipping box making sure that the contents include:
• Analog I/O module (Catalog Number 1746-Series)
• installation instructions (publication 1746-IN008)
If the contents are incomplete, call your local Allen–Bradley representative for assistance.
2. Determine your power requirements for the modular controller. Reference
Review the power requirements of your system to see that your chassis supports placement of the
analog module.
• For modular style systems, calculate the total load on the system power supply using the
procedure described in the SLC 500 Modular Hardware Style User Manual (publication
1747-UM011) or the SLC 500 Family System Overview (publication 1747-SO001).
• For fixed SLC 500 controllers, refer to the SLC 500 Fixed Hardware Style Installation &
Operation Manual (publication 1747-6.21).
Catalog Number Backplane Current Draw External 24V dc Power
5V (max.) 24V (max.)
Supply Tolerance
1746-NI4 35 mA 85 mA NA
1746-NIO4I 55 mA 145 mA NA
1746-NIO4V 55 mA 115 mA NA
1746-NO4I 55 mA 195 mA 24 ±10% at 195 mA max.
(21.6 to 26.4V dc)
(1)
1746-NO4V 55 mA 145 mA 24 ±10% at 145 mA max.
(1)
(1)
Required for some applications if SLC 24V power is not readily available.
(21.6 to 26.4V dc)
Chapter 3
(Installing and
Wiring Your
Analog Module)
Appendix A
(Specifications)
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Quick Start for Experienced Users 2-3
3. Configure the module using the DIP switches (analog inputs only). Reference
Each analog input channel can be configured for either voltage or current. Locate the DIP
switches on your module and set them for your application.
_
ON Configures channel for current input
_
Off Configures channel for voltage input
Current
1746-NI4
1746-NIO4I, NIO4V
1
O
N
Voltage
Current
O
N
Voltage
External
23
1
2
Switch 1 = Channel 0
4
Switch 2 = Channel 1
Switch 3 = Channel 2
Switch 4 = Channel 3
Switch 1 = Channel 0
Switch 2 = Channel 1
Chapter 3
(Installing and
Wiring Your
Analog Module)
1746-NO4I, NO4V
24V dc
Power
Selector
Backplane
Sw 1
4. Install your module. Reference
When selecting a slot for an analog module, position the module:
Chapter 3
(Installing and
• in a slot away from ac or high voltage dc modules
• in the chassis closest to the bottom of the enclosure where the SLC 500 system is
Wiring Your
Analog Module)
installed
• away from the chassis power supply if installed in a modular system
ATTENTION
Never install, remove, or wire modules with power
applied to the chassis or devices wired to the
modules.
Publication 1746-UM005B-EN-P - June 2004
2-4 Quick Start for Experienced Users
Make sure system power is off; then insert the analog module into your 1746 chassis. In this
example procedure, local slot 1 is selected.
Top and Bottom Module
Release(s)
Card Guide
5. Wire the module. Reference
Important: Follow these guidelines when wiring the module.
Chapter 3
(Installing and
• Use shielded communication cable (Belden 8761) and keep length as short as possible.
• Connect only one end of the cable shield to earth ground.
Wiring Your
Analog Module)
• Channels are not isolated from each other. All analog commons are connected together
internally.
• The module does not provide power for analog inputs.
• Use a power supply that matches the transmitter (sensor) specifications.
Publication 1746-UM005B-EN-P - June 2004
Quick Start for Experienced Users 2-5
NI4
NIO4I & NIO4V
NO4I & NO4V
+
analog
source
_
+
analog
source
_
+
analog
source
_
Load
24V dc power supply if
external power is selected.
Cable length from external
24V dc power supply to analog
module must be less than 10m.
earth
ground
earth
ground
Jumper unused
earth
ground
Jumper unused
earth
ground
Ext. pwr.
sup.
inputs.
inputs.
Do not jumper
unused outputs.
10
11
10
11
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
IN 0 +
_
IN 0
ANL COM
IN 1 +
_
IN 1
ANL COM
IN 2 +
_
IN 2
ANL COM
IN 3 +
_
IN 3
ANL COM
IN 0 +
_
IN 0
ANL COM
IN 1 +
_
IN 1
ANL COM
not used
OUT 0
ANL COM
not used
OUT 1
ANL COM
+24V dc
dc COM
Load
Load
Analog commons are internally connected
in the module. Channels are not isolated
from each other.
earth
ground
earth
ground
Do not jumper
unused outputs.
0
1
2
3
4
5
6
7
OUT 0
ANL COM
OUT 1
ANL COM
OUT 2
ANL COM
OUT 3
ANL COM
Publication 1746-UM005B-EN-P - June 2004
2-6 Quick Start for Experienced Users
6. Configure system I/O configuration. Reference
Configure your system I/O configuration for the particular slot the analog module is in. When
assigning an I/O module to a slot location, select the module from the displayed list. If not listed,
select OTHER at the bottom of the list and enter the module’s ID code at the prompt.
Catalog No. Module ID Code
1746-NI4 4401
1746-NIO4I 3201
1746-NIO4V 3202
1746-NO4I 5401
1746-NO4V 5402
7.
Check that the module is operating correctly.
Chapter 4
(Module
Operation
and System
Considerations)
Chapter 5
(Testing Your
Module)
Reference
ATTENTION
Machine motion during system checkout can be
hazardous to personnel. During all checkout
procedures, you must disconnect all devices which,
when energized, might cause machine motion.
Apply power to the fixed or modular system. The analog module LED (red) should be
illuminated, indicating that the module is receiving 24V dc power.
Publication 1746-UM005B-EN-P - June 2004
Quick Start for Experienced Users 2-7
8. Understanding analog inputs. Reference
Analog inputs convert current and voltage signals into 16–bit (max.) integer values and place
them in the input image for the slot that the analog module resides in.
Address 1746-NI4 1746-NI04I, -NI04V
I:e.0 Input Channel 0 Input Channel 0
I:e.1 Input Channel 1 Input Channel 1
I:e.2 Input Channel 2
I:e.3 Input Channel 3
Note: The e is the slot number.
Voltage/Current Range Integer Representation
-10V dc to +10V dc -32,768 to +32,767
0 to 10V dc 0 to 32,767±10V dc
0 to 5V dc 0 to 16, 384
Chapter 4
(Module
Operation and
System
Considerations)
1 to 5V dc 3,277 to 16,384
-20 mA to +20 mA -16,384 to +16,384
0 to 20 mA 0 to 16,384±20 mA
4 to 20 mA 3,277 to 16,384
Publication 1746-UM005B-EN-P - June 2004
2-8 Quick Start for Experienced Users
9. Understanding analog outputs. Reference
Analog outputs convert 16-bit integer values placed in the output image to voltage or current
signals for the slot that the analog card is in.
Address 1746-NO4 1746-NI04I, -NI04V
O:e.0 Output Channel 0 Output Channel 0
O:e.1 Output Channel 1 Output Channel 1
O:e.2 Output Channel 2
O:e.3 Output Channel 3
1746-NO4I, -NIO4I 1746-NO4V, -NIO4V
Current Range Decimal Representation
for Output Word
Voltage Range Decimal Representation
for Output Word
0 to 21 mA 0 to 32,764 -10 to +10V dc -32,768 to +32,764
0 to 20 mA 0 to 31, 208 0 to 10V dc 0 to 32,764
Chapter 4
(Module
Operation and
System
Considerations)
4 to 20 mA 6,242 to 31,208 0 to 5V dc 0 to 16,384
1 to 5V dc 3,277 to 16,384
10. Write ladder logic to process the module’s analog data. Reference
Several programming examples are provided in chapter 6 that demonstrate how to scale the raw
data from the analog card into engineering units such as psi, percent, etc. Study these examples
and apply them to your application as appropriate.
Chapter 5
(Testing Your
Module)
Chapter 6
(Programming
Examples)
Publication 1746-UM005B-EN-P - June 2004
Chapter
3
Installing and Wiring Your Analog Module
To obtain the maximum performance from an analog module, proper
module installation is imperative. This chapter describes the
procedures that you must follow to install the analog module in an
SLC 500 system. The following items are described:
• European Union Directive Compliance
• determining your power requirements
• configuring your module
• selecting a slot in the chassis
• installing your module
• wiring considerations
– system wiring guidelines
– grounding your cable
– determining the cable length
• wiring the analog module
• minimizing electrical noise on the analog module
European Union Directive Compliance
If this product is installed within the European Union or EEA regions
and has the CE mark, the following regulations apply.
EMC Directives
This product 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.
1 Publication 1746-UM005B-EN-P - June 2004
3-2 Installing and Wiring Your Analog Module
Determining Your Power Requirements for a Modular Controller
Analog modules require both 5V dc and 24V dc power from the
backplane of the SLC 500 system. However, the NO4I and NO4V
analog modules can use an external 24V dc power supply. This
eliminates the 24V dc backplane power requirement, providing
configuration flexibility if SLC power supply loading is critical. These
two modules provide user-supplied external 24V dc power supply
connections.
The 24V dc user power connection on a fixed SLC 500 can power an
NO4I or NO4V analog module. However, the regulation of the 24V dc
user connection on a modular SLC 500 power supply, Catalog Number
1746-P1, -P2, -P4 is outside of the requirements of the NO4I and
NO4V analog modules and cannot be used.
The following table shows the power requirements for each analog
module using backplane power. Use this table to calculate the total
load on the modular system power supply. For more information refer
to the SLC 500 user manual for modular controllers.
IMPORTANT
The analog modules do not supply loop power for
the input device. You must supply the appropriate
loop power for loop-powered input devices.
Determining Your Power Requirements for a Fixed Controller
Catalog Number 5 Volt Current 24 Volt Current
1746-NI4 35 mA 85 mA
1746-NIO4I 55 mA 145 mA
1746-NIO4V 55 mA 115 mA
1746-NO4I 55 mA
1746-NO4V 55 mA
(1)
Omit these values from your SLC power supply loading calculations if you decide to use an external
power supply.
195 mA
145 mA
(1)
(1)
The chart starting on the next page provides available analog module
combinations in the expansion chassis of a fixed controller.
valid combination
•
invalid combination
valid combination when used with
∇
external power supply
BASIC net = Basic Module is supplying power to an
AIC. No other device requiring power is connected
to the AIC.
Publication 1746-UM005B-EN-P - June 2004
Installing and Wiring Your Analog Module 3-3
NI4 NIO4I NIO4V NO4I NO4V
• • • _ • IA4
• • •
• • •
• • •
• • •
• • •
• • •
• • •
• • •
• • •
• • •
• • •
• • •
• •
• • •
• • •
∇
∇
∇
∇
∇
∇
∇ ∇
∇ ∇
∇
∇
∇
∇
∇
∇
∇ ∇
∇
∇
• IA8
• IA16
• IM4
• IM8
• IM16
• OA8
OA16
OAP12
• IB8
• IB16
• IV8
• IV16
• IG16
• OV8
OV16
• OB8
• OG16
• •
•
• • •
• •
•
•
•
•
• • •
• •
∇ ∇
∇ ∇
∇ ∇
∇
∇ ∇
∇ ∇
∇ ∇
∇ ∇
∇ ∇
∇ ∇
∇ ∇
∇ ∇
∇
∇ ∇
∇ ∇
OW4
OW8
OW16
• IO4
IO8
IO12
NI4
NIO4I
NIO4V
DCM
HS
OB16
• IN16
BASIC net
BASIC
OB32
OV32
Publication 1746-UM005B-EN-P - June 2004
3-4 Installing and Wiring Your Analog Module
NI4 NIO4I NIO4V NO4I NO4V
• • •
∇
• IV32
• • •
•
∇
∇ ∇
∇ ∇ ∇ ∇ ∇
∇ ∇ ∇ ∇ ∇
• • •
• • •
• • •
• •
• •
• • •
• • •
IMPORTANT
The NO4I and NO4V modules provide user supplied
∇
∇
∇
∇ ∇
∇ ∇
∇
∇
external 24V dc power supply connections. When
the NO4I module is used in a fixed controller, you
must provide an external power supply.
• IB32
OX8
NO4I
NO4V
• ITB16
• ITV16
• IC16
OBP16
OVP16
• NT4
• NR4
When the NO4I or NO4V is used with an external 24V dc power
supply and is placed in a fixed controller expansion chassis, it is
compatible with those modules noted in the compatibility chart
starting on the previous page. When set for external power, the
module will only draw the 5V current off the backplane. Refer to the
next section for details on how to configure your module for external
power.
The 24V dc user power connection on a fixed SLC 500 can power an
NO4I or NO4V analog module. However, the regulation of the 24V dc
user connection on a modular SLC 500 power supply, Catalog Number
1746-P1, -P2, and -P4 is outside of the requirements of the NO4I and
NO4V analog modules and cannot be used.
Publication 1746-UM005B-EN-P - June 2004
Installing and Wiring Your Analog Module 3-5
Configuring Your Module
The NI4, NIO4I and NIO4V analog modules have user selectable DIP
switch settings which allow you to configure the input channels as
either current or voltage inputs. The switches are located on the
analog module board. The following illustration shows the ON and
OFF switch settings. Switch orientation is also provided on the
nameplate of the module.
ON – Configures channel for current input
OFF – Configures channel for voltage input
ATTENTION
Care should be taken to avoid connecting a voltage
source to a channel configured for current input.
Improper module operation or damage to the
module can occur.
Switch Settings for the 1746–NI4
The NI4 has 4 individual DIP switches that control the input mode of
input channels 0 through 3. A switch in the ON position configures
the channel for current input. A switch in the OFF position configures
the channel for voltage input.
Current
1
O
N
Voltage
2
3
Switch 1 = Channel 0
4
Switch 2 = Channel 1
Switch 3 = Channel 2
Switch 4 = Channel 3
Switch Settings for the 1746-NIO4I and -NIO4V
The NIO4I and NIO4V have 2 individual switches labeled 1 and 2.
These switches control the input mode of input channel 0 and 1. A
switch in the ON position configures the channel for current input. A
switch in the OFF position configures the channel for voltage input.
Current
12
O
N
Switch 1 = Channel 0
Switch 2 = Channel 1
Voltage
Publication 1746-UM005B-EN-P - June 2004
3-6 Installing and Wiring Your Analog Module
External Power Switch for the 1746-NO4I and -NO4V
The NO4I and NO4V analog output modules have an external
24V dc power switch, SW1, which gives you the option of using an
external power supply. In the UP position, power is drawn from an
external power source. In the DOWN position, power is drawn from
the backplane of the module. The switch is located on the analog
module board. Switch orientation is also provided on the nameplate
of the module.
The 24V dc user power connection on a fixed SLC 500 can power an
NO4I or NO4V analog module. However, the regulation of the 24V dc
user connection on a modular SLC 500 power supply, Catalog Number
1746-P1, -P2, is outside of the requirements of the NO4I and NO4V
analog modules and cannot be used.
External
Choosing a Slot in the Chassis
Installing Your Module
24V dc
Power
Selector
Backplane
Two factors determine where the analog module should be located in
the chassis: ambient temperature and electrical noise. Consider the
following conditions when selecting a slot for an analog module.
Position the module:
• in a slot away from ac or high voltage dc module
• in the chassis closest to the bottom of the enclosure where the
SLC 500 system is installed
• away from the chassis power supply if installed in a modular
system
All modules are mounted in a single slot. Remember that in a modular
system the processor always occupies the first slot of the first chassis.
Sw 1
Publication 1746-UM005B-EN-P - June 2004
When installing the analog module in a chassis, it is not necessary to
remove the terminal block from the module. However, if the terminal
block is removed, use the write-on label located on the side of the
terminal block to identify the module location and type.
Installing and Wiring Your Analog Module 3-7
ATTENTION
Never install, remove, or wire modules with power
applied to the chassis. Also, do not expose analog
modules to surfaces or other areas that may typically
hold an electrostatic charge. Electrostatic charges can
destroy the analog circuitry.
SLOT ____
RACK ____
MODULE _____
Removing the Analog Module Terminal Block
To remove the terminal block, grasp it on the top and bottom and pull
outward and down.
IMPORTANT
The potentiometer sets the voltage during factory
calibration to 2.5 volts. It is set and sealed at the
factory and does not require any adjustments.
1. Verify that all switches are set correctly for the application.
ATTENTION
Care should be taken to avoid connecting a voltage
source to a channel configured for a current input.
Publication 1746-UM005B-EN-P - June 2004
3-8 Installing and Wiring Your Analog Module
2. Align the circuit board of the analog module with the card guide
of the chassis.
3. Slide the module in until both top and bottom retaining clips are
secured.
Top and Bottom Module Release(s)
Wiring Considerations
Card Guide
4. To remove the module, depress the retaining clips at the top and
bottom of the module and slide the module out.
The following section provides system wiring guidelines, how to
ground your Belden cable, and how to determine the cable length.
ATTENTION
Before wiring any analog module, disconnect power
from the SLC 500 system and from any other source
to the analog module.
Publication 1746-UM005B-EN-P - June 2004
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