Spectrum Controls 1746sc-INO4vi User Manual

Owner’s Guide 0300128-03 Rev. D

™

SLC 500
A

NALOG

Catalog Numbers
1746sc-INO4i
1746sc-INO4vi

I

O

UTPUT

SOLATED

M

ODULES

Important Notes

1. Please read all the information in this owner’s guide before installing
the product.

2. The information in this owner's guide applies to hardware and
firmware version 1.0 or later.

3. This guide assumes that the reader has a full working knowledge of
the relevant processor.

Notice

The products and services described in this owner's guide are useful in a
wide variety of applications. Therefore, the user and others responsible
for applying the products and services described herein are responsible
for determining their acceptability for each application. While efforts
have been made to provide accurate information within this owner's
guide, Spectrum Controls assumes no responsibility for the accuracy,
completeness, or usefulness of the information herein.

Under no circumstances will Spectrum Controls be responsible or liable
for any damages or losses, including indirect or consequential damages
or losses, arising out of either the use of any information within this
owner's guide or the use of any product or service referenced herein.

No patent liability is assumed by Spectrum Controls with respect to the
use of any of the information, products, circuits, programming, or
services referenced herein.

The information in this owner's guide is subject to change without notice.

Limited W arranty

Spectrum Controls warrants that its products are free from defects in
material and workmanship under normal use and service, as described in
Spectrum Controls literature covering this product, for a period of 1 year.
The obligations of Spectrum Controls under this warranty are limited to
replacing or repairing, at its option, at its factory or facility, any product
which shall, in the applicable period after shipment, be returned to the
Spectrum Controls facility, transportation charges prepaid, and which
after examination is determined, to the satisfaction of Spectrum Controls,
to be thus defective.

This warranty shall not apply to any such equipment which shall have
been repaired or altered except by Spectrum Controls or which shall have
been subject to misuse, neglect, or accident. In no case shall the liability
of Spectrum Controls exceed the purchase price. The aforementioned
provisions do not extend the original warranty period of any product
which has either been repaired or replaced by Spectrum Controls.

Table Of Contents

Preface

Overview And
Specifications

Installing And Wiring Your
Module

Things To Consider Before
Using Y our Module

Who Should Use This Guide....................................................................... iii

What This Guide Covers ............................................................................. iii

Related Allen-Bradley Documents.............................................................. iii

Terms & Abbreviations You Should Know ................................................... iv

Chapter 1

General Features And Benefits....................................................................1

Detailed Specifications.................................................................................2

Chapter 2

Avoiding Electrostatic Damage.................................................................... 6

Determining Power Requirements............................................................... 6

Setting The DIP Switch ................................................................................ 7

Selecting A Rack Slot ..................................................................................8

Inserting Your Module Into The Rack ........................................................... 8

Wiring Y our Module ....................................................................................10

Chapter 3

How The Processor Communicates With Your Module.............................. 13

Channel Update Time ................................................................................ 13

Temperature Calibration Time.................................................................... 14

Output Mode Change Time (-INO4vi only) ................................................14

Your Module’s Response To Slot Disabling................................................14

Using Your Output Module

Testing Y our Module

Chapter 4

Entering Your Module’s ID Code ................................................................15

Configuring Each Output Channel .............................................................18

Optional: Setting The Output Data Limits (or User-Defined Scale)............21

Controlling Each Output Channel’s Signal.................................................24

Monitoring Each Output Channel............................................................... 25

Checking Each Output Channel’s Configuration And Status..................... 25

Chapter 5

Inspecting Y our Module ..............................................................................29

Disconnecting Prime Movers .....................................................................30

Powering Up...............................................................................................30

Interpreting The LED Indicators .................................................................31

Interpreting I/O Error Codes ......................................................................31

Troubleshooting..........................................................................................32

ii SLC 500™ Isolated Analog Output Modules

Maintaining Your Module
And Ensuring Safety

Chapter 6

Preventive Maintenance.............................................................................33

Safety Considerations................................................................................33

Tables

Figures

Table 1. Related Allen-Bradley documents ................................................. iv

Table 2. Electrical specifications—module ................................................... 2

Table 3. Electrical specifications—outputs ................................................... 3

Table 4. Physical specifications....................................................................3

Table 5. Environmental specifications.......................................................... 4

Table 6. Backplane current consumed......................................................... 7

Table 7. Channel update time (channels already enabled) ........................ 14

Table 8. Output module ID code ................................................................15

Table 9. Channel configuration word details, Output Words 4 and 5 ......... 18

Table 10. Data format definitions ............................................................... 20

Table 11. Channel status word details, Input Words 4 through 7 ...............26

Table 12. LED definition .............................................................................31

Figure 1. Ferrite EMI suppressor for CE compliance ................................. 11

Figure 2. Wiring diagrams (showing differential outputs). .......................... 12

Figure 3. Output and input scans............................................................... 13

Figure 4. Output and input words............................................................... 16

Figure 5. Example relationship between output signal and channel data.. 24

Figure 6. LED block ................................................................................... 31

Figure 7. Problem resolution flowchar t ...................................................... 32

Who Should Use This
Guide

Preface

Read this preface to familiarize yourself with the rest of the owner’s
guide. This preface covers:

• who should use this guide

• what this guide covers

• related Allen-Bradley documents

• terms & abbreviations you should know

Use this guide if you design, install, program, or maintain a control
system that uses Allen-Bradley Small Logic Controllers.

You should have a basic understanding of SLC 500 products. You should
also understand electronic process control and the ladder program
instructions required to generate the electronic signals that control your
application. If you do not, contact your local Allen-Bradley
representative for the proper training before using these products.

What This Guide Covers

Related Allen-Bradley
Documents

This guide covers the 1746sc-INO4i and 1746sc-INO4vi isolated analog
output modules. It contains the information you need to install, wire, use,
and maintain these modules. It also provides diagnostic and
troubleshooting help should the need arise.

Table 1 lists several Allen-Bradley documents that may help you as you
use these products.

iv SLC 500™ Isolated Analog Output Modules

Table 1. Related Allen-Bradley documents

Allen-Bradley Doc. No. Title

1747-2.30 SLC 500 System Overview
SGI-1.1 Application Considerations for Solid State Controls
1770-4.1 Allen-Bradley Programmable Controller Grounding and

1747-6.2 Installation & Operation Manual for Modular Hardware

1747-NI001 Installation & Operation Manual for Fixed Hardware Style

1747-6.4 Allen-Bradley Advanced Programming Software (APS)

1747-6.11 Allen-Bradley Advanced Programming Software (APS)

1747-6.3 Getting Started Guide for Advanced Programming

Wiring Guidelines

Style Programmable Controllers

Programmable Controllers

User Manual

Reference Manual

Software (APS)

Terms & Abbreviations
You Should Know

ABT-1747-TSG001 SLC 500 Software Programmers’s Quick Reference

Guide
1747-NP002 Allen-Bradley HHT (Hand-Held Terminal) User Manual
1747-NM009 Getting Started Guide for HHT (Hand-Held Terminal)

SD499 Allen-Bradley Publication Index
AG-7.1 Allen-Bradley Industrial Automation Glossary

To obtain a copy of any of the Allen-Bradley documents listed, contact
your local Allen-Bradley office or distributor.

You should understand the following terms and abbreviations before
using this guide. For the definitions of terms not listed here, refer to
Allen-Bradley’s Industrial Automation Glossary, Publication AG-7.1

Attenuation – The reduction in magnitude of a signal as it passes
through a system. The opposite of gain.

Channel – Refers to one of the sets of signal interfaces available on a
module’s terminal block.

Channel update time – For analog outputs, the time required for the
channel to convert the data received from the processor to analog output
signals at the terminals.

Chassis – See rack.

Preface v

Common mode voltage – The voltage difference between the negative
terminal and analog common during normal differential operation.

Common mode voltage range – The largest voltage difference allowed
between either the positive or negative terminal and analog common
during normal differential operation.

Configuration word – Contains the channel configuration information
needed by the module to configure and operate each channel. Information
is written to the configuration word through the logic supplied in your
ladder program.

D/A – Refers to digital-to-analog conversion. The conversion produces
an analog output signal whose magnitude is proportional to the digital
value.

dB (decibel) – A logarithmic measure of the ratio of two signal levels.
Data scaling - The data format that you select to define the logical

increments of the channel data word.
Data word – A 16-bit integer that represents the value of the analog

output channel. The channel data word is valid only when the channel is
enabled and there are no channel errors.

Differential operation – The difference in voltage between a channel’s
positive and negative terminals.

Effective resolution – The number of bits in the channel data word that
do not vary due to noise.

Full-scale error (gain error) – The difference in slope between the
actual and ideal analog transfer functions.

Full-scale range (FSR) – The difference between the maximum and
minimum specified analog values.

Gain drift – The change in full-scale transition voltage measured over
the operating temperature range of the module.

LSB (least significant bit) – The bit that represents the smallest value
within a string of bits. The “weight” of this value is defined as the full­scale range divided by the resolution.

Maximum differential voltage – The largest voltage difference allowed
between the negative terminal and positive terminal during normal
differential operation.

Module ID code – A unique number associated with each 1746 I/O
module. The code defines for the processor the type of I/O or specialty
module residing in a specific slot in the 1746 chassis.

Module update time – See channel update time.

vi SLC 500™ Isolated Analog Output Modules

Overall accuracy – The worst-case deviation of the signal over the full
range, expressed in percent of full scale.

Rack – A hardware assembly that houses devices such as I/O modules,
adapter modules, processor modules, and power supplies.

Repeatability – The closeness of agreement among repeated
measurements of the same variable under the same conditions.

Resolution – The smallest detectable change in a measurement, typically
expressed in engineering units (e.g. 0.15 °C) or as a number of bits. For
example, a 12-bit system has 4096 possible output states. It can therefore
measure 1 part in 4096. See also effective resolution.

Safe state – The state of the analog outputs entered when the processor is
not in RUN mode. The user must ensure that this state is a safe state for
the application.

Status word – Contains status information about the channel’s current
configuration and operational state. You can use this information in your
ladder program to determine whether the channel data word is valid.

Step response time – The time required for the output signal to reach
95% of its expected, final value, given a full-scale step change in the
output data word.

Useful resolution – See effective resolution.

Chapter

Overview And Specifications

The 1746sc-INO4i provides four isolated channels of current outputs,
while the 1746sc-INO4vi provides four isolated channels of current or
voltage outputs (in any combination). In both modules, the voltage and/or
current ranges are independently configurable for each channel. These
modules also provide new, advanced features to make your control
systems more dependable and flexible.

1

General Features And
Benefits

Read this chapter to familiarize yourself further with your isolated analog
module (shown above). This chapter covers:

• general features and benefits

• detailed specifications

Increased System Accuracy and Reliability

Both modules provide 750 Vdc channel-to-channel isolation, which
means no electrical noise crosstalk between channels (resulting in a high
usable resolution). They also provide 750 Vdc field-wiring-to-backplane
isolation to protect the processor and rack. These modules even feature
onboard temperature compensation to maintain their accuracy with
fluctuating ambient temperatures, which is important for crowded control
cabinets.

Reduced System Costs

Because isolation is built into these modules, you can improve system
accuracy while saving hundreds of dollars on system installation costs.
Expensive, external isolation blocks are simply not required. They also

2 SLC 500™ Isolated Analog Output Modules

provide a single-slot solution for applications requiring up to four, mixed
analog outputs, so you don’t have to buy more I/O than you need.

State-of-the-Art Perf ormance

These modules incorporate proprietary Allen-Bradley technology, so they
operate and perform like the latest Allen-Bradley products. They also
provide 16-bits of resolution, user-programmable range settings,
continuous temperature compensation (no field calibration), software
configuration, programmable output limits, and programmable safe states
in case of a fault.

Detailed Specifications

Table 2. Electrical specifications—module

Backplane Current Consumption (maximum)

1746sc-INO4i 120 mA @ 5 Vdc

250 mA @ 24 Vdc

1746sc-INO4vi 120 mA @ 5 Vdc

250 mA @ 24 Vdc
Backplane Power Consumption (typical) 0.6 W
Number Of Channels 4 (differential, individually isolated)
I/O Chassis Location Any 1746 I/O module slot except slot 0
A/D Conversion Method Sigma-Delta
Calibration Factory calibrated

Temperature compensation once a minute

Opto-Electrical Isolation 750 Vdc channel-to-channel

750 Vdc field wiring-to-backplane

Module ID Code

1746sc-INO4i 3521
1746sc-INO4vi 3519

Thermal Dissipation 4.5 W maximum

Chapter 1: Over view And Specifications 3

Table 3. Electrical specifications—outputs

Output Current Ranges
(selectable for each channel) 4 to 20 mA

0 to 20 mA
0 to 21 mA

Output Voltage Ranges—INO4vi only
(selectable for each channel) -10 to +10 Vdc

0 to 10 Vdc

0 to 5 Vdc
1 to 5 Vdc

SLC Communication Formats
(selectable for each channel) Scaled engineering units

Scaled for PID

Proportional counts

1746-NO4 format

User-defined scale
Output Impedance

Current Outputs Greater than 1 MΩ
Voltage Outputs—INO4vi only Less than 1.0 Ω

Load Range

Current Outputs 0 to 500 Ω

Voltage Outputs—INO4vi only 1 kΩ and greater
Max. Current, Voltage Mode—INI4vi only 10 mA
Output Step Response Time 1 ms (0–95% of full scale)
Channel Update Time (maximum) 33.7 ms for all 4 channels in parallel
Output Resolution 16-bit

Current Outputs 366 nA/count

Voltage Outputs—INO4vi only 320 µV/count
Overall Accuracy

Current Outputs 0.08% of full scale @ 25 °C

0.15% of full scale @ 60 °C

Voltage Outputs—INO4vi only 0.08% of full scale @ 25 °C

0.35% of full scale @ 60 °C

Table 4. Physical specifications

LED Indicators Four green channel status indicators, one for each channel

One green module status indicator
Recommended Cable Belden 8761 (shielded, twisted-pair) or equivalent
Wire Size (maximum) One 12–24 AWG wire per terminal
Terminal Block Removable (supplied)

4 SLC 500™ Isolated Analog Output Modules

Table 5. Environmental specifications

Operating Temperature 0 to 60 °C (32 to 140 °F)
Storage Temperature -40 to 85 °C (-40 to 185 °F)
Relative Humidity 5 to 95% non-condensing
Certifications UL/CUL and CE
Hazardous Environment Classifications Class I Division 2 Groups ABCD

Chapter

Installing And Wiring Your Module

Read this chapter to install and wire your module. This chapter covers:

• avoiding electrostatic damage

• determining power requirements

• setting the DIP switch

• selecting a rack slot

• inserting your module into the rack

• wiring your module
Note that although your module has a jumper on its printed circuit board,

this jumper is for the manufacturer’s use only. Also, your module was
calibrated by the manufacturer, so you don’t need to perform this task.

2

Important - For UL and CUL compliance, power and input/output (I/O)
wiring must be in accordance with Class I, Division 2, wiring methods
[Article 501-4 (b) of the National Electrical Code , NFPA 70] and in
accordance with the authority having jurisdiction. Also, you must observe
the warnings shown below. Failure to observe these warnings can cause
personal injury.

WARNING

!

EXPLOSION HAZARD

Substitution of components may impair suitability for
Class I, Division 2;

When in hazardous locations, turn off power before
replacing or wiring modules;

Do not disconnect equipment unless power has been
switched off or the area is known to be non-hazardous.