Omron SYSMAC CJ1W-AD04U, SYSMAC CJ1W-AD04U-SL Operation Manual

Universal Input Units

Cat. No. W466-E1-02

SYSMAC CJ Series
CJ1W-AD04U
CJ1W-AD04U-SL

OPERATION MANUAL

SYSMAC CJ Series

CJ1W-AD04U
CJ1W-AD04U-SL
Universal Input Units

Operation Manual

Revised December 2007

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Notice:

OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.

The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or dam­age to property.

!DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury. Additionally, there may be severe property damage.

!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury. Additionally, there may be severe property damage.

!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury, or property damage.

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.

The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.

The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program­ming Device displays to mean Programmable Controller.

Visual Aids

The following headings appear in the left column of the manual to help you locate different types of
information.

Note Indicates information of particular interest for efficient and convenient opera-

tion of the product.

1,2,3...

1. Indicates lists of one sort or another, such as procedures, checklists, etc.

 OMRON, 2006

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, or
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission of
OMRON.

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con­stantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.

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TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

1 Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

2 General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

5 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

SECTION 1

Features and System Configuration . . . . . . . . . . . . . . . . 1

1-1 Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1-3 Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-4 Functions Listed by Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SECTION 2

Specifications and Component Names . . . . . . . . . . . . . . 9

2-1 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2-2 Input Types and Data Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2-3 Nomenclature and Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SECTION 3

Installation and Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3-1 Installing the Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3-2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

SECTION 4

Input Functions and Operating Procedures . . . . . . . . . . 23

4-1 Exchanging Data with the CPU Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4-2 Detailed Description of User Settings Area Data . . . . . . . . . . . . . . . . . . . . . . . . . 33

4-3 Expansion Setting Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

SECTION 5

Error Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

5-1 Indicators and Error Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5-2 Errors Detected by the Universal Input Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5-3 Errors Related to the CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5-4 Restarting Special I/O Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5-5 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

viii

TABLE OF CONTENTS

Appendices

A Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

B Supplementary Explanations of Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

C Data Coding Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

ix

About this Manual:

This manual describes the specifications, installation, troubleshooting, and other information on the
CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units. This manual includes the sections
described below.

Please read this manual and the other manuals related to the Universal Input Units carefully and be
sure you understand the information provided before attempting to install and operate the Units. The
manuals used with the Universal Input Units are listed in the following table. The suffixes have been
omitted from the catalog numbers. Be sure you are using the most recent version for your area.

Section 1 introduces the features and primary functions, describes the system configuration, and out­lines the operating procedure.

Section 2 describes the specifications, component names, and switch settings of the CJ1W-AD04U
and CJ1W-AD04U-SL Universal Input Units.

Section 3 explains how to install and wire the CJ1W-AD04U and CJ1W-AD04U-SL Universal Input
Units.

Section 4 describes the input functions and operating procedures of the CJ1W-AD04U and CJ1W­AD04U-SL Universal Input Units.

Section 5 explains how to troubleshoot errors and alarms that occur in the CJ1W-AD04U and CJ1W­AD04U-SL Universal Input Units.

Appendix A provides details on dimensions.

Appendix B provides supplementary explanations of functions.

Appendix C provides data coding tables.

Name Cat. No. Contents

SYSMAC CJ-series
CJ1G-CPU@@, CJ1G/H-CPU@@H, CJ1M-CPU@@
Programmable Controllers Operation Manual

W393 Describes the installation and operation

of the CJ-series PLCs.

SYSMAC CS/CJ-series
CS1G/H-CPU@@-EV1, CS1G/H-CPU@@H, CJ1G­CPU@@, CJ1G/H-CPU@@H, CJ1M-CPU@@
Programmable Controllers Programming Manual

W394 Describes the programming methods

required to use the functions of the CS/
CJ-series PLCs.

SYSMAC CS/CJ-series
CS1G/H-CPU@@-EV1, CS1G/H-CPU@@H, CJ1G­CPU@@, CJ1G/H-CPU@@H, CJ1M-CPU@@
Programmable Controllers Instructions Reference Manual

W340 Describes the ladder diagram program-

ming instructions supported by CS/CJ­series PLCs.

SYSMAC WS02-CXPC1-EV70
CX-Programmer Ver. 7.0 Operation Manual

W446 Provides information on how to use the

CX-Programmer, a programming device
that supports the CS/CJ-series PLCs.

SYSMAC CS/CJ-series
CQM1H-PRO01-E, CQM1-PRO01-E, C200H-PRO27-E
Programming Consoles Operation Manual

W341 Provides information on how to program

and operate CS/CJ-series PLCs using a
Programming Console.

!WARNING Failure to read and understand the information provided in this manual may result in per-

sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

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Read and Understand this Manual

Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON­INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.

LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.

In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

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Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.

At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:

• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.

• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.

• Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND INSTALLED
FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.

xiii

Disclaimers

CHANGE IN SPECIFICATIONS

Product specifications and accessories may be changed at any time based on improvements and other
reasons.

It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.

PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.

ERRORS AND OMISSIONS

The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

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xv

PRECAUTIONS

This section provides general precautions for using the Universal Input Units.

The information contained in this section is important for the safe and reliable application of the Universal Input
Unit. You must read this section and understand the information contained before attempting to set up or operate
a Universal Input Unit.

1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

xvi

Intended Audience 1

1 Intended Audience

This manual is intended for the following personnel, who must also have
knowledge of electrical systems (an electrical engineer or the equivalent).

• Personnel in charge of installing FA systems

• Personnel in charge of designing FA systems

• Personnel in charge of managing FA systems and facilities

2 General Precautions

The user must operate the product according to the performance specifica­tions described in the operation manuals.

Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amuse­ment machines, safety equipment, and other systems, machines, and equip­ment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.

Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.

This manual provides information for operating the OMRON Universal Input
Units. Be sure to read this manual before attempting to use a Universal Input
Unit and keep this manual close at hand for reference during operation.

!WARNING It is extremely important that a PLC and all PLC Units be used for the speci-

fied purpose and under the specified conditions, especially in applications that
can directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PLC System to the above-mentioned appli­cations.

3 Safety Precautions

!WARNING Do not attempt to take any Unit apart while power is being supplied. Doing so

may result in electric shock.

!WARNING Provide safety measures in external circuits (i.e., not in the Programmable

Controller), including the following items, in order to ensure safety in the sys­tem if an abnormality occurs due to malfunction of the PLC or another exter­nal factor affecting the PLC operation. Not doing so may result in serious
accidents.

• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.

• The PLC will turn OFF all outputs when its self-diagnosis function detects
any error or when a severe failure alarm (FALS) instruction is executed.
As a countermeasure for such errors, external safety measures must be
provided to ensure safety in the system.

• The PLC outputs may remain ON or OFF due to deposition or burning of
the output relays or destruction of the output transistors. As a counter-

xvii

Operating Environment Precautions 4

measure for such problems, external safety measures must be provided
to ensure safety in the system.

• When the 24-VDC output (service power supply to the PLC) is overloaded
or short-circuited, the voltage may drop and result in the outputs being
turned OFF. As a countermeasure for such problems, external safety
measures must be provided to ensure safety in the system.

!WARNING Do not apply a voltage or current outside the specified range to this Unit.

Doing so may result in malfunction or fire.

!Caution When wiring crossovers between terminals, the total current for both terminals

will flow in the line. Check the current capacities of all wires before wiring
crossovers.

!Caution Tighten the screws on the terminal block of the AC Power Supply Unit to the

torque specified in the operation manual. The loose screws may result in
burning or malfunction.

!Caution Execute online edit only after confirming that no adverse effects will be

caused by extending the cycle time. Otherwise, the input signals may not be
readable.

4 Operating Environment Precautions

!Caution Do not operate the control system in the following places:

• Locations subject to direct sunlight.

• Locations subject to temperatures or humidity outside the range specified
in the specifications.

• Locations subject to condensation as the result of severe changes in tem­perature.

• Locations subject to corrosive or flammable gases.

• Locations subject to dust (especially iron dust) or salts.

• Locations subject to exposure to water, oil, or chemicals.

• Locations subject to shock or vibration.

!Caution Take appropriate and sufficient countermeasures when installing systems in

the following locations:

• Locations subject to static electricity or other forms of noise.

• Locations subject to strong electromagnetic fields.

• Locations subject to possible exposure to radioactivity.

• Locations close to power supplies.

xviii

Application Precautions 5

5 Application Precautions

Observe the following precautions when using the PLC.

!WARNING Always heed these precautions. Failure to abide by the following precautions

could lead to serious or possibly fatal injury.

• Always connect to a class-3 ground (to 100

Ω or less) when installing the

Units. Not connecting to a class-3 ground may result in electric shock.

• Always turn OFF the power supply to the PLC before attempting any of
the following. Not turning off the power supply may result in malfunction or
electric shock.

• Mounting or dismounting I/O Units, CPU Units, Memory Cassettes, or
any other Units.

• Assembling the Units.

• Setting DIP switch or rotary switches.

• Connecting or wiring the cables.

!Caution Failure to abide by the following precautions could lead to faulty operation of

the PLC or the system, or could damage the PLC or PLC Units. Always heed
these precautions.

• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal
lines, momentary power interruptions, or other causes.

• Always use the power supply voltage specified in this manual. An incor­rect voltage may result in malfunction or burning.

• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied. Be particularly careful in places
where the power supply is unstable. An incorrect power supply may result
in malfunction.

• Install external breakers and take other safety measures against short-cir­cuiting in external wiring. Insufficient safety measures against short-cir­cuiting may result in burning.

• Do not apply voltages to input sections in excess of the rated input volt­age. Excess voltages may result in burning.

• Do not apply voltages or connect loads in excess of the maximum switch­ing capacity to output sections. Excess voltage or loads may result in
burning.

• Be sure that all the mounting screws, terminal screws, and cable connec­tor screws are tightened to the torque specified in the relevant manuals.
Incorrect tightening torque may result in malfunction.

• Wiring correctly, as indicated in this manual.

• Do not attempt to disassemble, repair, or modify any Units.

• Be sure to confirm that the DIP switch and the data memory (DM) are
properly set.

• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction.

• Remove the labels after the completion of wiring to ensure proper heat
dissipation. Leaving the label attached may result in malfunction.

xix

Application Precautions 5

• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals. Connection of bare stranded wires may result in
burning.

• Do not pull on cables and cords and do not bend them past their natural
bending radius.

• Do not place any heavy objects on cables or cords.

• Mount the Unit only after checking the terminal block completely.

• Be sure that the terminal blocks, Memory Units, expansion cables, and
other items with locking devices are properly locked into place. Improper
locking may result in malfunction.

• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera­tion.

• Double-check all the wiring before turning on the power supply. Incorrect
wiring may result in burning.

• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.

• Changing the operating mode of the PLC (including the setting of the
startup operating mode).

• Force-setting/force-resetting any bit in memory.

• Changing the present value of any word or any set value in memory.

• Touch a grounded metal object to discharge static electricity from your
body before touching any Unit.

• The following precautions apply to Power Supply Units with Replacement
Notification.

• When the LED display on the front of the Power Supply Unit starts to
alternately display “0.0” and “A02” or the alarm output automatically
turns OFF, replace the Power Supply Unit within 6 months.

• Separate the alarm output cables from power lines and high-voltage
lines.

• Do not apply a voltage or connect a load to the alarm output that ex­ceeds the rated voltage or load.

• Maintain an ambient storage temperature of

−20 to 30°C and humidity

of 25% to 70% when storing the product for longer than 3 months to
keep the replacement notification function in optimum working condi­tion.

• Always use the standard installation method. A nonstandard installa­tion will decrease heat dissipation, delay the replacement notification
signal, and may degrade or damage the internal elements.

• This product is EMC compliant when assembled in a complete PLC sys­tem of the specified PLC Series. Refer to the applicable manual for
grounding, cable selection, and any other conditions for EMC compliance.

• This is a class A product. In residential areas it may cause radio interfer­ence, in which case the user may be required to take adequate measures
to reduce interference.

xx

Conformance to EC Directives 6

6 Conformance to EC Directives

Applicable Directives •EMC Directives

• Low Voltage Directive

Concepts

■ EMC Directives

OMRON supplies electric devices that are used built into other devices or
manufacturing equipment. These OMRON products are designed to conform
to the related EMC standards (see note) so that the devices or equipment in
which they are used can more easily conform to EMC standards.

EMC-related performance of the OMRON devices that conform to EC Direc­tives will vary depending on the configuration, wiring, and other conditions of
the equipment or control panel on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices
and the overall machine conform to EMC standards.

Note Applicable EMC (Electromagnetic Compatibility) standards are as follows:

EMS (Electromagnetic Susceptibility)

EN 61000-6-2

EMI (Electromagnetic Interference)

EN 61000-6-4 (Radiated emission: 10-m regulations)

■ Low Voltage Directive

Always ensure that devices operating at voltages of 50 to 1,000 V AC and 75
to 1,500 V DC meet the required safety standards for the PLC (EN 61131-2.)

Conformance to EC
Directives

CJ-series products conform to EC Directives. However, the following precau­tions must be observed to ensure that the machine or device in which the CJ­series PLC is used conforms to EC Directives:

1. The CJ-series PLC must be installed within a control panel.

2. You must use reinforced insulation or double insulation for the DC power
supplies used for the I/O power supplies. The DC power supply connected
to the power supply terminals on PLCs using DC power must have an out­put hold time of at least 10 ms.

3. CJ-series products conforming to EC Directives also conform to EN
61000-6-4 for EMI. Radiated emission characteristics (10-m regulations)
may vary depending on the configuration of the control panel used, other
devices connected to the control panel, wiring, and other conditions. You
must therefore confirm that the overall machine or equipment conforms to
EC Directives even when using CJ-series products that conform to EC Di­rectives.

1

SECTION 1

Features and System Configuration

This section introduces the features and primary functions, describes the system configuration, and outlines the operating
procedure.

1-1 Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1-3 Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-4 Functions Listed by Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2

Features and Functions Section 1-1

1-1 Features and Functions

This section introduces the features and primary functions of the CJ-series
CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units.

Four Input Channels The CJ1W-AD04U and CJ1W-AD04U-SL Universal Input Units are CJ-series

Special I/O Units with four input channels on each Unit. Each input channel
can be set independently to one of four input types: DC voltage, DC current,
thermocouple, or resistance thermometer.

Isolation between
Channels

The input channels are isolated in the Universal Input Unit, so unwanted cur­rent paths will not occur between thermocouple inputs or voltage inputs that
share the same power supply. Signal converters are not needed to prevent
interference between inputs.

DC current input
4 to 20 mA, 0 to 20 mA

DC voltage input
1 to 5 V, 0 to 5 V,

0 to 10 V

Thermocouple input
K, J, T, L, R, S, B

Platinum resistance
thermometer input

Pt100 (JIS, IEC)
Pt1000, JPt100

V

mA

Universal Input Units

Screw-terminal model: CJ1W-AD04U

Pin-terminal model: CJ1W-AD04U-SL

Channel 1

Channel 2

Channel 3

Channel 4

Universal Input Unit

Isolation

Isolation

Isolation

3

Features and Functions Section 1-1

Scaling Function This function takes the value scaled in industrial units with respect to the input

signal and transfers it to the CPU Unit as the process value. Because of this,
no ladder program is required at the CPU Unit for scaling.

Process Value Alarms Two process values can be set as alarm outputs (high and low alarms). Also,

an alarm notification can be passed directly to an output device by using the
Expansion Settings Area.

Alarm Hysteresis Settings The hysteresis values can be set for the process value alarms. Frequent ON/

OFF switching of the alarm output can be eliminated by setting a dead zone
between the alarm output’s start and stop.

Alarm Output ON Delay A fixed time delay can be set before the output starts for an alarm output (high

or low limit). The ON delay can be set between 0 and 60 s. Each channel’s
ON delay is set independently, but the same ON delay applies to the channel’s
high and low limit alarms.

Input signal

Industrial unit

4

20 mA

0

Lower limit

800 Pa

Upper limit

High limit alarm (H)

Low limit alarm (L)

Process value input

Alarm output (H)

Alarm output (L)

Hysteresis

H

y

steresis

High limit alarm (H)

Low limit alarm (L)

Process value input

Alarm output (H)

Alarm output (L)

4

Features and Functions Section 1-1

The following example shows the operation of the high limit alarm output.

Input Error Detection An error input can be detected if the input signal significantly exceeds the high

or low limit.

Note With thermocouple and platinum resistance thermometer inputs, an input

error is detected if the temperature exceeds the high or low limit of the sensor
range by 20

°C or 20°F.

With voltage and current inputs, an error is detected only for the following val­ues in the 1 to 5 V and 4 to 20 mA ranges:

• 1 to 5 V range: Converted AD value < 0.3 V

• 4 to 20 mA range: Converted AD value < 1.2 mA

Either the high or low direction can be specified for the detection of a discon­nection.

The allowable range limits are as follows:

• Temperature Input

Upper limit: Upper limit of temperature range +20

°C or +20°F

Lower limit: Lower limit of temperature range

−20°C or −20°F

• Voltage/Current Input

Upper limit: 105%

Lower limit:

−5%

Note Sensor error detection is effective only when the input type is set to thermo-

couple input, platinum resistance thermometer input, 1 to 5 V input, or 4 to
20 mA input. The Sensor Error Flag will be turned ON if there is no input sig­nal from the thermocouple input, platinum resistance thermometer input, 1 to
5 V input, or 4 to 20 mA input.

Detection of Cold
Junction Sensor Errors

If the Unit’s built-in cold junction sensor fails, the Cold Junction Sensor Error
Flag will be turned ON to indicate the error.

Zero/Span Adjustment The zero point and span point can be adjusted for a process value.

The zero adjustment offsets the line plotting values before and after adjust­ment parallel to the original line. The span adjustment changes the slope of
the line (i.e., the gain) around the minimum value in the range.

Time

Hysteresis

ON delay time

High limit alarm (H)

Process value input

Alarm output (H)

Universal Input Unit

Disconnection

Sensor

Error Flag

CPU Unit

ON

High/low designation:
high or low