欧姆龙PLC操作手册_c20p_c28p_c40p_c60p

Cat. No. W167-E1-4A

SYSMACProgrammable ControllersC20P/C28P/C40P/C60PP-type Programmable Controllers

Installation Guide

Revised July 1994

C20PC60PC60PC20Piv

Notice:

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

The following conventions are used to indicate and classify precautions in this manual. Always heedthe information provided with them. Failure to heed precautions can result in injury to people or dam-age to the product.

DANGER!

Indicates information that, if not heeded, is likely to result in loss of life or seriousinjury.

WARNINGIndicates information that, if not heeded, could possibly result in loss of life or

serious injury.

Caution

Indicates information that, if not heeded, could result in relative serious or minorinjury, damage to the product, or faulty operation.

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refersto 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 “PC” means Programmable Controller and is not used as an abbreviation for any-thing else.

Visual Aids

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

NoteIndicates information of particular interest for efficient and convenient operation

of the product.1, 2, 3...

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

?OMRON, 1989

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

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON isconstantly striving to improve its high–quality products, the information contained in this manual is subject to changewithout notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes noresponsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the informa-tion contained in this publication.

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vi

TABLE OF CONTENTS

SECTION 1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

System Installation and Wiring. . . . . . . . . . . . . . . . . . . . .

2-1General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Installation Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3Dimensions and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4I/O Connecting Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Wiring CPUs and Expansion I/O Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6I/O Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7Special Wiring Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Switch Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3

Maintenance and Inspection. . . . . . . . . . . . . . . . . . . . . . .

3-1General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Self-diagnostic Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Replacing Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Preventive Measures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.Standard Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B.Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.Programming Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D.

Programming Console Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

27

13

1414162124274446

51

5252535659

61

61677379

8789

vii

About this Manual:

This manual has been prepared to provide the information necessary to install, set up, and maintainyour C-series P-type Programmable Controller, a low-cost, compact, versatile industrial control sys-tem providing up to 148 I/O points. For information regarding system programming and operation,refer to the Operation Manual.

Analog I/O Units are also not described in detail in this manual because a separate manual is pro-vided for them (SYSMAC K-type Analog I/O Units Operation Guide, Cat.No. W122)

Section 1 describes the basic Units that can be used to build a K-type PC, explains how the Unitscan be combined, and provides example system configurations.

Section 2 covers actual system installation and wiring, including switch settings.Section 3 provides information on maintaining your PC in good working condition.

WARNINGFailure to read and understand the information provided in this manual may result in

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

ix

SECTION 1Introduction

1-1

Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1CPUs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-2Expansion I/O Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-3Analog Timer Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-4I/O Link Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

223567

1-2

1

NomenclatureSection 1-1

1-1Nomenclature

1-1-1CPUs

EPROM socket,DIP switch

High-speed Counter

Indicators

Memory

2

This section gives the names and functions of the various components ofP-type PCs and the basic Units with which they can be combined in aSystem.

In the diagram below, the C28P is shown as a representative model. Refer toAppendix A Standard Models for your model’s exact specifications.

Power supplyGround

Outputs

Indicators

CPU,

Expansion I/OUnit, AnalogTimer Unit,Analog I/OUnit, or I/OLink Unitconnector

High-speed counterInputs24-VDC output(HDM(98)–) inputs

Peripheral connector

When the high-speed counter (HDM(98)) is not being used, the two

high-speed counter input terminals can be used as normal DC input termi-nals. Their ON/OFF response time, however, will be shorter (0.15 ms max.).Regardless of whether or not the high-speed counter command is beingused, DIP switch pins 7 and 8 must be off whenever the hardware reset isnot being used.

The diagram below shows the functions of the various indicators, taking theC20P as an example.

OUTPUT 5 CH

0 1 2 3 4 5 6 7OUTPUT: Shows whether the output is ON or OFF.POWER: Stays lit while power is turned on to thePC.

RUN: Stays lit while the PC is operating normally.

POWERRUNALARM: Blinks during battery abnormality or scantime overrun. At this time PC operation will be ALARMintermittent.

ERRORERROR: Lights when self-diagnosis detects anINPUT 0 CH

abnormality. The PC will stop operating.0 1 2 3 4 5 6 7INPUT: Shows whether the input is ON or OFF.

8 9 10 11Each of the C-series P-type PCs is provided with a built-in RAM (random-ac-cess memory), as well as a ROM (read-only memory) chip socket. Eithermay be used with ease. It is recommended to use the RAM for programmingand, when the program is completed, to save it in a ROM chip for protection.The memory capacity in either case is 1,194 addresses.

Nomenclature

ROM Socket and DIPSwitch

Section 1-1

Beneath the cover are the DIP switch and the socket where an EPROM chipmay be installed. For details, see 2-8-1 Setting the CPU DIP Switch and2-8-2 EPROM Installation. Only DIP switch pins 1 and 2 are on when theCPU is delivered.

ROM socket87654, 32, 1Turn ON to use hardware reset (0001).Turn OFF if FUN 61 is not used.Turn ON for English display.Turn ON to inhibit ALARM indicator.ROM: ON (RAM: OFF)RAM: ON (ROM: OFF)CAUTION: In case of battery failure, data stored in

the RAM, the DM area, the HR area, etc., will not be preserved.

1-1-2Expansion I/O Units

In the diagram below, the C20P is shown as a representative model. Refer toAppendix A Standard Models for your model’s exact specifications.

Power supplyGround

Outputs

Indicators

CPU,

ExpansionI/O Unit, or I/O Link Unitconnector

CPU,

ExpansionI/O Unit,

Analog TimerUnit, AnalogI/O Unit, or I/O Link Unitconnector

CPU left/rightselector

Inputs24-VDC output

3

Nomenclature

Indicators

CPU Left/Right Selector

Horizontal Mounting

4

Section 1-1

The following diagram shows the functions of the various indicators, takingthe C20P as an example.

OUTPUT 5 CH

0 1 2 3 4 5 6 7OUTPUT: Shows whether the output is ON or OFF.

POWER

POWER: Stays lit while power is turned ON to theI/O Unit.

INPUT 0 CH

0 1 2 3 4 5 6 78 9 10 11INPUT: Shows whether the input ON or OFF.

The C20P, C28P, C40P, and C60P Expansion I/O Units all have CPU left/right selector switches. The C16P and C4K do not. For those models whichhave the switch, care must be taken to set it so that it corresponds with thedirection of the I/O Connecting Cable. If the switch is set in the wrong direc-tion, the System will operate as if the I/O Unit were not there. Set the switchso that the CPU connector side (Left or Right) is “in,” as shown in the follow-ing diagram. Do not change the switch setting after power has been turnedON, as this will cause the I/O bus to malfunction.

LRLin RoutFromTo I/O CPU

LinkUnit

LRRin LoutTo I/O FromLinkCPU

Unit

The following example diagrams show the proper switch settings for horizon-tal and vertical mounting of Units.

All Units can be positioned horizontally.

C20P-CN501CPUI/O UnitSet to Left in Right outNomenclature

Vertical Mounting

Section 1-1

All Units except the C16P and C4K can be positioned vertically.

CPUC20P-CN411

I/O UnitSet to Right in Left out

1-1-3Analog Timer Unit

CPU connector

Install and connect the ExpansionI/O Unit and the CPU horizontally;otherwise the Analog Timer Unitcannot be connected to the CPU.

Internal variable resistors

These variable resistors are used to set the timersand, from left to right, correspond to T0 to T3. Thesettings of these resistors are effective only when thecorresponding IN/EXT selector is set to IN. To set oradjust the time, use the screwdriver supplied with theAnalog Timer Unit. Turn the variable resistor shaftsclockwise to increase the time value.

Min.Max.Two M4 mounting screws (self-rising pressure plate)Indicators

The SET indicators in the toprow light while timer valuesare being set. The TIME UPindicators in the bottom rowlight when the correspondingtimer contact (T0 to T3) turnsON. Numbers 00 to 03 corre-spond to T0 to T3.

I/O Connecting CableC4K-CN502

One cable is supplied with theAnalog Timer Unit

IN/EXT selectors

When using the internal variableresistor, set the corresponding pin toIN; when using an external variableresistor, set the corresponding pin toEXT. These selectors correspond toT0 to T3 from left to right.

This connector is not used. Do not remove the cover.

External variable resistor connectors

When using external variable resistors to set the timers, connect theresistors to these connectors. The corresponding IN/EXT selectormust be set to the EXT position. These connectors correspond toT0 to T3 from left to right. Use 20 kW external variable resistors. AConnecting Cable with a 2-m lead is available for a variable resistor(C4K-CN223).

5

Nomenclature

External Variable Resistor

Section 1-1

The contactor employs solderless terminals and must be wired as shown be-low, using AWG 22 to 28 lead wires.

Analog Timer Unitconnector

External variableresistor (20 kW)

1-1-4I/O Link Units

The I/O Link Unit must be used as a Remote I/O Slave, and must be usedwith a Remote I/O Master. Refer to the Remote I/O Unit Operation Guide fordetails.

Operation output terminalIndicates that the power is ONand that the CPU is in RUN orMONITOR mode with no errors.

Repeater Output Terminal

Sends repeater signals to a LinkAdapter. The repeater output is ONwhen power is ON in the CPU andI/O Link Unit. (See the Link AdapterManual for details.)

Power indicator

Transmitting error indicator

Blinks during normal transmission.Lights continuously to indicate atransmission or connection error.

Optical fiber connectors

CPU or ExpansionI/O Unit connector

AC power supply

Ground

6

System ConfigurationSection 1-2

1-2System Configuration

Depending on your control requirements, you can combine various Units fora total number of I/O points ranging anywhere from 20 to 148.

A P-type PC consists of a CPU Unit plus one or more of the following Units:Expansion I/O Units, Analog Timer Units, Analog I/O Units, or an I/O LinkUnit. All of these Units are connected in series with the CPU Unit at one end.An I/O Link Unit, if included, must be on the other end (meaning only one I/OLink Unit can be used) and an Analog Timer Unit cannot be used with. Therest of the Units can be in any order desired. The Units from which P-typePCs can be built are shown below.

Unit type

CPU

C20PC28PC40PC60P

Expansion I/O Unit

C4KC20PC28PC40PC60P

Special I/O Units

Analog Timer UnitC4K Analog Input UnitC1K Analog Input UnitAnalog Output UnitI/O Link Unit

Name

Wordsoccupied22442224422222

Inputsprovided12 points16 points24 points32 points12 points16 points24 points32 points4 timer inputs4 analog inputs1 analog input1 analog output

16 input and 16 output bits

Outputsprovided8 points12 points16 points24 points8 points12 points16 points24 points

4 input points or 4 output points

When determining which configuration to use, another factor to consider isthe ease with which I/O points can be assigned. In order to make the processas simple as possible, it is recommended that a CPU be used which has

more I/O points than the largest Expansion I/O Unit. For example, rather thancombining a C20P CPU with a C20P Expansion I/O Unit, it would be prefer-able to use a C40P CPU. Similarly, combining a C60P CPU with a C40 Ex-pansion I/O Unit would be better than using a C40P CPU and a C60P Expan-sion I/O Unit.

The tables on the following pages show the possible configurations for aP-type PC. Although the tables branch to show the various possibilities atany one point, there can be no branching in the actual PC connections. Youcan choose either branch at any point and go as far as required, i.e., you canbreak off at any point to create a smaller PC System.When implementing asystem there is a physical restriction on the total cable length allowable. Thesum of the lengths of all cables in the system must be limited to less than 1.2meters.

The tables also show I/O word allocations for the Units in the systems andwhich words will be input words and which words will be output words. All ofthese are determined by the position of the Unit in the configuration exceptfor the C4P and C16P Expansion I/O Units, in which case the model of theUnit determines whether the words are input or output.

7

System Configuration

8

Section 1-2

The symbols used in the table represent the following:

C20P/C28PInputOutputC20P or C28P CPU Unit

C40P/C60PInputOutputInputOutputC40P or C60P CPU orExpansion I/O Unit

C4K/C16PInput or OutputC4K or C16P Expansion I/O Unit

C20P/C28P/TU/AN/LUC20P Expansion I/O Unit, C28P Expansion I/O Unit,InputOutputAnalog Timer Unit, Analog I/O Unit, or I/O Link Unit

Dimensions and InstallationSection 2-3

Horizontal Mounting

Vertical Mounting

20

Another factor to consider is the I/O wiring (see 2-6 I/O Wiring). If the CPUand/or Expansion I/O Units are mounted vertically, a minimum of 70 mmopen space is required for ease of I/O wiring. The spacing of the mountingholes, for both vertical and horizontal mounting is as shown below.

5Four, M4Two, M4BF–10Four, M4BDCCPUExpansionAnalog I/O UnitTimer UnitA ± 0.2FA ± 0.2GA ± 0.2EBTwo, M4110 ± 0.2HC4KC ± 0.2DI/OLink230250FA ± 0.2Unit120Two, M45Four, M4BDCCPUC ± 0.2I–10IDExpansionI/O UnitA + 0.2I–10I230I/OLink230UnitTwo, M4110 ± 0.2120I/O Connecting Cable

ModelCPU

C20PC28P

I/O Unit

C40PC60P

I/O Unit

C16PC4K

Analog TimerUnitF15 to 40

C4K-TM

A±0.2B2402402903401453131

2502503003501554040

C±0.2D100100100120100100100

110110110140110110110

E55515555

Section 2-4

G15 to 35

H20 to 40

I80 to 130

Attach End Plates (PFP-M) to both ends (as shown below) when connectingCPUs, Expansion I/O Units, or Analog Timer Units to a DIN Rail. It is alsorecommended that a Spacer (PFP-S) be installed between a CPU and Ex-pansion I/O Unit when they are mounted horizontally.

10PC5I/O Unit10XXEnd plateDIN RailSpacerEnd plateMounting screws are included with CPUs, Expansion I/O Units, and AnalogTimer Units. They must be purchased separately for I/O Link Units.

2-4I/O Connecting Cable

Applicable connecting cable will vary according to which Units are connectedand whether they are mounted horizontally or vertically. All Expansion I/OUnits except the C16P and C4K use C20P-CN501 cable (5 cm) for horizontalmounting and C20P-CN411 cable (40 cm) for vertical mounting. The C16Pand C4K cannot be mounted vertically. The C16P can use either of theabove-mentioned cables for horizontal mounting. The C4K can use onlyC4K-CN502 cable (5 cm). For connecting I/O Link Units, use C20P-CN711cable (70 cm).

CautionAlways be sure to use only the cable that is included with the Unit. Using the

wrong cable (such as the C20 I/O Connecting Cable or I/O Link ConnectingCable) for connecting Expansion I/O Units can cause serious damage to theUnits.

21

I/O Connecting CableConnecting Analog TimerUnits

22

Section 2-4

The following diagrams illustrate the appropriate cables for connecting CPUs,Expansion I/O Units, and I/O Link Units either horizontally or vertically.

Horizontal Mounting

5 to 30 cmCPUI/O UnitI/O LinkUnit

I/O Connecting Cable C20P-CN501I/O Link ConnectingCable C20P-CN711

Vertical Mounting

I/O Link ConnectingCable C20-CN711CPUI/O Link100 to 200mmUnitI/O UnitI/O ConnectingI/O UnitCable C20P-CN411I/O Link100 to 200mmUnitCPUI/O Link ConnectingI/O Connecting Cable C20P-CN711

Cable C20P-CN411

One Analog Timer Unit can be connected directly to a CPU or to any combi-nation of a CPU and Expansion I/O Units. In either case, as shown in the fol-lowing diagram, the Units must be mounted horizontally.

Analog Timer Unit

CPUConnecting CableC4K-CN502Analog Timer UnitCPUI/O UnitConnecting CableC4K-CN502

I/O Connecting Cable

Connecting I/O Link Units

Section 2-4

One I/O Link Unit can be connected directly to a CPU or to any combinationof a CPU and Expansion I/O Units. It cannot be used in the same PC Systemwith an Analog Timer Unit.

Follow these four steps to connect Expansion I/O Unit, Analog Timer, and I/OLink Unit Connecting Cables.

Remove the connector cover from the CPU, using a screwdriver if nec-essary.

Insert one of the cable’s connectors into the cover. (Once inserted, theconnector cannot be removed.)

Reinsert the cover/connector combination into the CPU.Repeat this procedure on the other end of the cable.

Connection Procedure

1, 2, 3...1.

2.3.4.

Cover

Optical Fiber Cable

Optical fiber cable can be used for extending transmission distance and re-ducing noise. There are three types, and the appropriate cable for any givensituation will depend on the desired transmission distance and the particularUnits which need to be connected.

All-plastic optical fiber cable (APF) is for short-distance transmission (up to20 m) and can be used only by Units with the suffix “-P” attached. Plas-tic-clad optical fiber cable (PCF) is for middle-distance transmission (up to200 m for Units with “-P” and 800 m for Units without “-P”). Crystal opticalfiber cable (AGF) is for long-distance transmission (up to 3 km) and can beconnected only to certain Link Adapters.

Although laying optical fiber cable does not basically differ from laying wirecable, there are certain precautions which should be observed. For details,refer to the Optical Remote I/O Systems Manual.

Link Adapters

Although it is normally possible to connect Units in series, a failure (powerfailure, disconnection, etc.) in one of the Units will cause all the subsequentUnits to cease operating. You can use Link Adapters to prevent this type ofsituation from occurring. Even if a power failure occurs in a Unit connected toa branch line of a Link Adapter, the Link Adapter will bypass that Unit andcontinue to transmit signals to the other Units. You can also use Link Adapt-ers for branching and for converting between various types of wire and opti-cal cable. For details on these and other functions of Link Adapters, refer tothe Link Adapter Manual.

23

Wiring CPUs and Expansion I/O UnitsSection 2-5

2-5Wiring CPUs and Expansion I/O Units

Use a commercially available 24-VDC, 100 to 120-VAC, or 200 to 240-VACPower Supply

Wiring

24

power supply (depending on your model) for the CPU. When an ExpansionI/O Unit(s) or an I/O Link Unit is used, the power supply must also be con-nected to each of these Units. Where possible, use independent powersources for the inputs, the output loads, and the CPU. All of the CPUs andExpansion I/O Units may be connected to the same power source. If a CPUand an Expansion I/O Unit are connected to separate power supplies, thenthe CPU (as well as the Programming Console, etc.) will not operate unlesspower is turned on to the Expansion I/O Unit.

The following diagram illustrates the proper wiring for CPUs and ExpansionI/O Units with the suffix “-A.” These models use a power supply of 100 to 240VAC, with an operating voltage range of 85 to 264 VAC. The internalnoise-reduction system in these Units is sufficient for general power linenoise, but ground noise can be greatly reduced by using a 1:1 insulating

transformer. Ground only the primary side of the transformer. To prevent volt-age drop, use wires 2 mm2 or less in cross sectional area, twisting them asshown in the diagram. When power is turned on, the incoming current will beapproximately 10 A.

Insulating transformer1:1

Breaker

M3.5 screws

Wiring CPUs and Expansion I/O UnitsSection 2-5

Connect an I/O Link Unit as shown in the following diagram, using M4 termi-nal screws.

M4 screws

100 to 240 VAC

Breaker

Insulatingtransformer1:1

The following diagram illustrates the proper wiring for CPUs and ExpansionI/O Units with the suffix “-D.” These models use a power supply of 24 VDCwith an operating voltage range of 20.6 to 26.4 VDC. Be careful to connectthe positive and negative terminals correctly. When power is turned ON, theincoming current will be approximately 30 A.

Breaker

M3.5 screws

25

Wiring CPUs and Expansion I/O Units

Ground

Section 2-5

The Line Ground (LG) terminal is a noise filter neutral terminal which doesnot normally require grounding. When electrical noise is a problem, however,this terminal should be connected to the GR terminal.

Attach an independent ground-wire with a cross-sectional area of at least 2mm2 (AWG 14) to the GR terminal, to avoid electrical shock. Ground resis-tance must be less than 100 W. Do not use a ground-wire longer than 20 m.Care must be taken because ground resistance is affected by the nature ofthe ground, water content, season, and the amount of time that has elapsedsince the wire was laid underground.

CPU operation may be adversely affected if the ground-wire is shared withother equipment, or if grounding is attempted by attaching the ground-wire tothe metal superstructure of a building. When either Expansion I/O Units orI/O Link Units are used, they also require grounding at the GR terminal.These may all be included on the same ground.

GR

LG

26

I/O WiringSection 2-6

2-6I/O Wiring

This section shows I/O wiring diagrams for representative models of all theCPUs, Expansion I/O Units, and I/O Link Units covered in this manual. It alsogives connection examples for the sensors and switches which can be con-nected as input devices.

2-6-1Unit Wiring Diagrams

The following items are all available for use as outputs. Do not mix themwithin the same common circuit.

OutputRelayTransistorTriac

Load Power SupplyUp to 250 VAC/24 VDC5 to 24 VDC

100 to 120/200 to 240 VAC

When using transistor outputs, connect the common line (COM) to the loadpower supply negative side. For an induction load, connect the diode to theload in parallel, as shown in the diagram, such that the cathode is on thepositive side of the power supply.

L+OUTCOM

When using the high-speed counter (HDM(98)) instruction, wire input 0000as the high-speed counter input and input 0001 as the hardware reset input.If the HDM(98) is not used, inputs 0000 and 0001 may be used as generalinput terminals. Their response time (0.15 ms), however, will be shorter thanthe other inputs.

Do not connect the NC terminals to anything. The DC inputs in the followingI/O wiring diagrams are NPN (positive common). Reverse the polarity if PNP(negative common) is used.

In the diagrams, representative models are sometimes used to cover severalmodels with similar wiring. In such cases, the type of Unit (i.e., CPU C60P) islisted first, followed by the suffix of the applicable model number. A space leftblank (j) in the model number indicates that any of several numbers couldbe inserted there.

27

I/O Wiring

CPU C20P, C28P, C40P(CDj-A)

Section 2-6

The inputs can use the Unit’s 24-VDC power supply output. If the maximumoutput current of 0.3 A is not sufficient a separate DC power supply must beused.

Not in C20P

LoadLoadLoadLoadpowerpowerpowerpower

Groundsupplysupplysupplysupply

Loadpowersupply

Loadpowersupply

Not in C20P or C28P

Loadpowersupply

Relay contact outputsTransistor outputsTriac outputs

Powersupply(100 to240 VAC)

NCNC

M3.5 screws

7.5 max.7.5 max.Inputs (24 VDC)

High-speedcounterinput

24-VDC output

(0.3 A max.)

Hardware reset input

Not in C20P

Not in C20P or C28P

COM

NC: Do not connect the NC terminals to anything.

28

I/O Wiring

CPU C20P, C28P, C40P(CAj-A)

Section 2-6

Inputs 0000 and 0001 can use the Unit’s 24-VDC power supply output. If themaximum output current of 0.3 A is not sufficient a separate DC power sup-ply must be used. Inputs 0002 to 0107 take a 100-VAC power supply.

Not in C20P

LoadLoadLoadLoadpowerpowerpowerpower

Groundsupplysupplysupplysupply

Loadpowersupply

Loadpowersupply

Not in C20P or C28P

Loadpowersupply

Relay contact outputsTriac outputs

Powersupply(100 to240 VAC)

NCNC

M3.5 screws

7.5 max.7.5 max.0000, 0001 24-VDC inputs0002 to 0101 100-VAC inputsHigh-speedcounterinput

Hardwarereset input

Not in C20P

24-VDC output

(0.3 A max.)

Not in C20P or C28P

100 to 120 VAC

NC: Do not connect the NC terminals to anything.

29

I/O Wiring

CPU C20P, C28P, C40P(CDj-D)

A separate power supply must be used for the DC inputs.

Not in C20P

LoadLoadLoadLoadpowerpowerpowerpower

Groundsupplysupplysupplysupply

Loadpowersupply

Loadpowersupply

Section 2-6

Not in C20P or C28P

Loadpowersupply

Relay contact outputsTransistor outputs

Powersupply(24 VDC)

NCNC

M3.5 screws

7.5 max.7.5 max.Inputs (24 VDC)

High-speedcounterinput

NCNC

Hardwarereset input

Not in C20P or C28P

Not in C20P

COM +24 VDC

NC: Do not connect the NC terminals to anything.

30

I/O Wiring

CPU C60P (CDj-A)

Section 2-6

The inputs can use the Unit’s 24-VDC power supply output. If the maximumoutput current of 0.3 A is not sufficient, however, a separate DC power supplymust be used.

Powersupply

(100 toLoad powersupply240

VAC)

Ground

Relay contact outputsTransistor outputsTriac outputs

LoadpowersupplyLoadpowersupplyLoadpowersupplyLoadpowersupply

Upper terminal block

M3.5 screws

7.5 max.7.5 max.Lower terminal block

Inputs (24 VDC)

High-speedcounterinput

24-VDCoutput(0.3 Amax.)

Hardware reset input

31

I/O Wiring

CPU C60P (CAj-A)

Section 2-6

Inputs 0000 and 0001 can use the Unit’s 24-VDC power supply output. If themaximum output current of 0.3 A is not sufficient, however, a separate DCpower supply must be used. Inputs 0002 to 0115 take a 100-VAC power sup-ply.

Powersupply

(100 toLoad powersupply240

VAC)

Ground

Relay contact outputsTriac outputs

LoadpowersupplyLoadpowersupplyLoadpowersupplyLoadpowersupply

Upper terminal block

M3.5 screws

7.5 max.7.5 max.Lower terminal block

High-speedcounterinput

24-VDCoutput(0.3 Amax.)

Hardwarereset input

100 to 120 VAC

0000, 0001 24-VDC inputs0002 to 0115 100-VAC inputs

32

I/O Wiring

Section 2-6

CPU C60P (CDj-D)

A separate power supply must be used for the DC inputs.

Ground

PowersupplyLoadLoadLoadLoadRelay contact outputs(24Load powerpowerpowerpowerpowerTransistor outputs

VDC)

supply

supplysupplysupplysupply

Upper terminal block

M3.5 screws

7.5 max.7.5 max.Lower terminal block

Inputs (24 VDC)

High-speedcounterinput

Hardware reset input

Do not connect the NC terminals to anything.

33

I/O Wiring

I/O Unit C20P/C28P/C40P(EDj-A)

Section 2-6

The inputs can use the Unit’s 24-VDC power supply output. If the maximumoutput current of 0.3 A is not sufficient, however, a separate DC power supplymust be used.

Not in C20P

Powersupply(100 to240 VAC)

LoadLoadLoadLoadpowerpowerpowerpower

Groundsupplysupplysupplysupply

Loadpowersupply

Loadpowersupply

Not in C20P or C28P

Loadpowersupply

Relay contact outputsTransistor outputsTriac outputs

NCNC

M3.5 screws

7.5 max.7.5 max.Inputs (24 VDC)

Not in C20P

Not in C20P or C28P

COM

24-VDC output

(0.3 A max.)

34

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