Omron SYSMAC C20K, SYSMAC C28K, SYSMAC C40K, SYSMAC C60K Installation Manual
Cat. No. W147-E1-02B
K-type Programmable Controllers
Installation Guide
Revised August 1993
C20P
C60K
C60K
C20P
iv
v
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 head precautions can result in injury to people or damage to the product.
DANGER! Indicates information that, if not heeded, is likely to result in loss of life or serious
injury.
WARNING Indicates 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 minor
injury, 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 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, means
“word” and is abbreviated “Wd” in documentation.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Indicates information of particular interest for efficient and convenient operation of the product.
Indicates lists of one sort or another, such as procedures, precautions, etc.
OMRON, 1989
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.
Note
1, 2, 3...
vi
vii
TABLE OF CONTENTS
SECTION 1
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–1 Nomenclature 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 System Configuration 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2
System Installation and Wiring 9. . . . . . . . . . . . . . . . . . . . .
2–1 General 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 Installation Environment 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 Dimensions and Installation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–4 I/O Connecting Cable 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–5 Wiring CPUs and Expansion I/O Units 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–6 I/O Wiring 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–7 Special Wiring Precautions 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–8 Settings 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3
Maintenance and Inspection 47. . . . . . . . . . . . . . . . . . . . . . .
3–1 General 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 Self–Diagnostic Functions 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 Replacing Parts 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 Preventive Measures 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–5 Inspection 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
A Standard Models 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Specifications 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Programming Console Operations 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Programming Instructions 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E System Configuration Chart 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ix
About this Manual:
This manual has been prepared to provide the information necessary to install, set up, and maintain
your C-series K-type Programmable Controller, a low-cost, compact, versatile industrial control system providing up to 148 I/O points. For information regarding system programming and operation,
refer to the operation manual.
Refer to the Appendix for a complete list of all products covered in this manual, along with their full
model numbers.
x
1
SECTION 1
Introduction
1–1 Nomenclature 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–1–1 CPUs 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–1–2 Expansion I/O Units 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–1–3 Analog Timer Unit 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–1–4 I/O Link Units 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 System Configuration 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
1–1 Nomenclature
This section gives the names and functions of the various components of
K–Type PCs and the basic Units with which they can be combined in a
System.
1–1–1 CPUs
In the diagram below, the C20K is shown as a representative model. Refer to
Appendix A Standard Models for your model’s exact specifications.
Power supply Ground Outputs Indicators
Expansion
I/O Unit,
Analog
Timer Unit, or
I/O Link Unit
connector
24–VDC output
Peripheral connector
InputsHigh–speed counter
(HDM) inputs
EP–ROM socket,
DIP switch
High–speed Counter When the high–speed counter (HDM(61)) is not being used, the two high–
speed counter input terminals can be used as normal DC input terminals.
Their ON/OFF response time, however, will be shorter (0.15 ms max.). Regardless of whether or not the high–speed counter command is being used,
DIP switch pins 7 and 8 must be off whenever the hardware reset is not being used.
Indicators The diagram below shows the functions of the various indicators, taking the
C20K as an example.
8 9 10 11
0 1 2 3 4 5 6 7
OUTPUT 1 CH
POWER
RUN
ALARM
ERROR
INPUT 0 CH
OUTPUT: Shows whether the output is ON or OFF.
POWER: Stays lit while power is turned on to the
PC.
RUN: Stays lit while the PC is operating normally.
ALARM: Blinks during battery abnormality or cycle
time overrun. At this time PC operation will be
intermittent.
ERROR: Lights when self–diagnosis detects an
abnormality. The PC will stop operating.
INPUT: Shows whether the input is ON or OFF.
0 1 2 3 4 5 6 7
Memory Each of the C–Series K–Type PCs is provided with a built–in RAM (random–
access memory), as well as a ROM (read–only memory) chip socket. Either
may be used with ease. It is recommended to use the RAM for programming
and, 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 Section 1–1
3
Beneath the cover are the DIP switch and the socket where an EP–ROM
chip may be installed. For details, see 2–7–1 Setting the CPU Dipswitch and
2–7–2 EP–ROM Installation. Only DIP switch pins 1 and 2 are on when the
CPU is delivered.
ROM socket
8 Turn ON to use hardware reset (0001).
7 Turn OFF if HDM(61) is not used.
6 Turn ON for English display.
5 Turn ON to inhibit ALARM indicator.
4, 3 ROM: ON (RAM: OFF)
2, 1 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.
1–1–2 Expansion I/O Units
In the diagram below, the C20P is shown as a representative model. Refer to
Appendix A Standard Models for your model’s exact specifications.
Power supply Ground Outputs Indicators
CPU,
Expansion
I/O Unit,
Analog
Timer Unit, or
I/O Link Unit
connector
24–VDC outputInputsCPU left/right
selector
CPU,
Expansion
I/O Unit, or
I/O Link Unit
connector
ROM Socket and DIP
Switch
Nomenclature Section 1–1
4
Indicators The following diagram shows the functions of the various indicators, taking
the C20P as an example.
8 9 10 11
0 1 2 3 4 5 6 7
OUTPUT 5 CH
POWER
INPUT 0 CH
OUTPUT: Shows whether the output is ON or OFF.
POWER: Stays lit while power is turned ON to the
I/O Unit.
INPUT: Shows whether the input ON or OFF.
0 1 2 3 4 5 6 7
CPU Left/Right Selector 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 which
have the switch, care must be taken to set it so that it corresponds with the
direction of the I/O Connecting Cable. If the switch is set in the wrong direction, the System will operate as if the I/O Unit were not there. Set the switch
so that the CPU connector side (Left or Right) is ”in,” as shown in the following diagram. Do not change the switch setting after power has been turned
ON, as this will cause the I/O bus to malfunction.
Lin Rout
To I/O
Link
Unit
From
CPU
LR
Rin Lout
To I/O
Link
Unit
From
CPU
LR
The following example diagrams show the proper switch settings for horizontal and vertical mounting of Units.
Horizontal Mounting (All Units can be positioned horizontally.)
Set to Left in Right out
C20P–CN501
CPU
I/O Unit
Nomenclature Section 1–1
5
Vertical Mounting (All Units except the C16P and C4K can be positioned vertically.)
C20P–CN411
Set to Right in Left out
CPU
I/O Unit
1–1–3 Analog Timer Unit
Internal variable resistors
These variable resistors are used to set the timers
and, from left to right, correspond to T0 to T3. The
settings of these resistors are effective only when the
corresponding IN/EXT selector is set to IN. To set or
adjust the time, use the screwdriver supplied with the
Analog Timer Unit. Turn the variable resistor shafts
clockwise to increase the time value.
Min.
Max.
Two M4 mounting screws
(self–rising pressure plate)
Indicators
The SET indicators in the top
row light while timer values
are being set. The TIME UP
indicators in the bottom row
light when the corresponding
timer contact (T0 to T3) turns
ON. Numbers 00 to 03 correspond to T0 to T3.
This connector is not used.
Do not remove the cover.
External variable resistor connectors
When using external variable resistors to set the timers, connect the
resistors to these connectors. The corresponding IN/EXT selector
must be set to the EXT position. These connectors correspond to
T0 to T3 from left to right. Use 20 k
Ω external variable resistors.
CPU connector
Install and connect the Expansion
I/O Unit and the CPU horizontally;
otherwise the Analog Timer Unit
cannot be connected to the CPU.
I/O Connecting Cable
C4K–CN502
One cable is supplied with the
Analog Timer Unit
IN/EXT selectors
When using the internal variable
resistor, set the corresponding pin to
IN; when using an external variable
resistor, set the corresponding pin to
EXT. These selectors correspond to
T0 to T3 from left to right.
Nomenclature Section 1–1
6
External Variable Resistor The contactor employs solderless terminals and must be wired as shown be-
low, using AWG 28 to 22 lead wires.
Analog Timer Unit
connector
External variable
resistor (20 k
Ω)
1–1–4 I/O Link Units
The I/O Link Unit must be used as a Remote I/O Slave, and must be used
with a Remote I/O Master. Refer to the Remote I/O Unit Operation Guide for
details.
Operation output terminal
Indicates that the power is ON
and that the CPU is in RUN or
MONITOR mode with no errors.
Repeater Output Terminal
Sends repeater signals to a Link
Adapter. The repeater output is ON
when power is ON in the CPU and
I/O Link Unit. (See the Link Adapter
manual for details.)
Optical fiber connectors
Transmitting error indicator
Blinks during normal transmission.
Lights continuously to indicate a
transmission or connection error.
AC power supply
Ground
CPU or Expansion
I/O Unit connector
Power indicator
Nomenclature Section 1–1
7
1–2 System Configuration
Depending on your control requirements, you can combine various Units for
a total number of I/O points ranging anywhere from 20 to 148.
For example, a single C20K CPU, with no Expansion I/O Units connected,
has a total of 20 I/O points, broken down into 12 input points and 8 output
points. If it is used in combination with a C4K Input Unit, there will be a total
of 16 input points and 8 output points. If combined with a C4K Output Unit,
the total will be 12 input points and 12 output points.
If the C20K is combined with a C16P Expansion I/O Unit, there will be a sum
total of 36 I/O points. If the C16P is an Input Unit, they will be broken down
into 28 input points and 8 output points; if it is an Output Unit, there will be 12
input points and 24 output points. For a listing of possible Unit combinations
and numbers of I/O points, see Appendix E System Configuration Chart.
Only one Expansion I/O Unit with the suffix ”P” can be connected to any
given CPU. It is possible to add more than one C4K, but under no circumstances can the total number of I/O points exceed 148. Either one Analog
Timer Unit or one I/O Link Unit can be added to any other possible combination of Units.
When determining which configuration to use, another factor to consider is
the ease with which I/O points can be assigned. In order to make the process
as 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 than
combining a C20P CPU with a C20P Expansion I/O Unit, it would be preferable to use a C40P CPU. Similarly, combining a C60P CPU with a C40 Expansion I/O Unit would be better than using a C40P CPU and a C60P Expansion I/O Unit.
This is intended only as a brief overview of system configuration possibilities.
In addition to Appendix E System Configuration Chart (mentioned above),
see the I/O tables in the operation manual for details on various possible
combinations of Units and the particular I/O bits and IR area work bits which
are available for use in each configuration.
System Configuration Section 1–2
9
SECTION 2
System Installation and Wiring
2–1 General 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 Installation Environment 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 Dimensions and Installation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–4 I/O Connecting Cable 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–5 Wiring CPUs and Expansion I/O Units 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–6 I/O Wiring 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–6–1 Unit Wiring Diagrams 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–6–2 I/O Device Connection Examples 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–7 Special Wiring Precautions 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–8 Settings 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–8–1 Setting the CPU DIP Switch 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–8–2 EP–ROM Installation 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–8–3 High–Speed Counter 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–8–4 Inhibiting the ALARM Indicator 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–8–5 Setting the I/O Link Unit 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
2–1 General
This section explains how to install and set up your Control System, with specifics on the proper environment, actual mounting, applicable cable, wiring,
and switch settings.
2–2 Installation Environment
Although the K–Type Programmable Controller is quite durable, the following
conditions must be observed in order for your System to operate at its highest level of reliability.
Ambient temperature Operating: 0° to 55°C*
Storage: –20 to 65
°C
Humidity 35% to 85% RH (without condensation)
Must be free from the following:
• Corrosive gases
• Abrupt temperature changes
• Direct sunlight
Atmosphere
• Concentration of dust, salt, iron particles
• Splatter from water, oil, other chemicals
Vibration and shock Must not receive direct impact or vibration
*The ambient operating temperature for the Programming Console is 05 to 455
CAUTION
In low humidity conditions, excessive static electricity of over 8 KV can damage internal components such as ICs. Therefore, before touching the PC, be
sure to first touch a grounded metallic object to discharge any static electricity buildup.
Noise Prevention Use twisted pair cables with cross–sectional areas of at least 2 mm
2
/conductor (AGW 14) to prevent noise. Avoid mounting the PC close to high–power
equipment, and be sure to mount it at least 200 mm away from power lines.
Wherever possible, use wiring ducts to contain and protect the PC wiring.
The I/O wiring should not be placed in the same duct with the power line or
other wiring. Standard wiring conduits are sufficient as long as the I/O wiring
and power lines are kept separate.
200mm
min.
200mm min.
PC
Installation Environment Section 2–2
11
Duct Work When CPUs and Expansion I/O Units are mounted horizontally, be sure that
no ducts or wiring passes between them. The diagram shows an example of
unacceptable mounting.
If the controlled system requires either 10 A at 400 V max. or 20 A at 220 V
max. power cables, and if the conduits are run parallel to each other, a minimum distance of 300 mm must be provided between the I/O lines and the
power cable. If the I/O lines and the power cables must be placed in the
same duct at the point of connection to the equipment, be sure to screen
them with a grounded metal plate.
3
Metal (iron) plate
200 mm min.
Grounding (at a ground resistance of less than 100
Ω )
1 PC I/O circuit
2 PC power circuit
3 General control circuit/Power circuit
1
2
Weak current cable
300 mm min.
300 mm min.
Control cable
Power cable
Ground (at a resistance of
less than 100
Ω )
1
2
3
Installation Environment Section 2–2
12
2–3 Dimensions and Installation
This section gives dimensions and other information necessary for mounting
the CPUs, Expansion I/O Units, Analog Timer Units, and I/O Link Units. All
measurements are in mm.
CPUs (The C20K is shown as an example.)
A
240
240
290
340
Model
C20K
C28K
C40K
C60K
B
250
250
300
350
C
100
100
100
120
Four M4 screws
D
110
110
110
140
E
5
5
5
15
Expansion I/O Units (The C20P is shown as an example.)
Four M4 screws
Dimensions and Installation Section 2–3
13
Expansion I/O Units cont.
Model
C16P
C20P
C28P
C40P
C60P
A
145
240
240
290
340
B
155
250
250
300
350
C
100
100
100
100
120
D
110
110
110
110
140
E
5
5
5
5
15
2–M4
C4K
Analog Timer Units C4K–TM
I/O Link Units C20–LK011(–P)
Two M4 holes
Dimensions and Installation Section 2–3
14
DIN Rails
*
5
15
––
Model
PFP–50N
PFP–100N
PFP–100N2
L
50 cm
1 m
1 m
* Use the PFP–100N2 for the C60P.
If the PFP–50N or PFP–100N are
used, the Unit will be slanted.
PFP–50N/PFP–100N
PFP–100N2
Endplate PFP–M
Eight M4
panhead
screws
Spacer PFP–S
Mounting A CPU and Expansion I/O Unit may be mounted either vertically or horizon-
tally in relation to each other but the orientation of each unit itself must remain horizontal as described by the following mounting diagrams. If mounting
the units vertically, position the CPU above the Expansion I/O Unit; if mounting horizontally, position the CPU to the left.
When installing the CPUs, Expansion I/O Units, and I/O Link Units, allow sufficient space between the Units for cooling. Models taking a 100– to
240–VAC power supply require a minimum cooling space of 10 mm between
Units. Avoid mounting any units in warm areas or over a heat source of any
kind.In addition, if the CPU is installed in a control box, allow sufficient space
for maintenence and ventilation. It may be necessary to install a ventilation
fan in the control box to maintain the required ambient temperature as indicated in Appendix B Specifications.
Control Box
Fan
PC
Vent
Dimensions and Installation Section 2–3
15
Another factor to consider is the I/O wiring (see 2–5 I/O Wiring). If the CPU
and/or Expansion I/O Units are mounted vertically, a minimum of 70 mm
open space is required for ease of I/O wiring. The spacing of the mounting
holes, for both vertical and horizontal mounting is as shown below.
Horizontal Mounting
A ± 0.2 A ± 0.2
G
A ± 0.2
D C
4–M4 4–M4 2–M4
Expansion
I/O Unit
CPU
Analog
Timer Unit
B B
F–10
A ± 0.2
2–M4
B
F
F
C ± 0.2
D
C4K
230 250
5
E
H
110
± 0.2
120
2–M4
I/O
Link
Unit
Vertical Mounting
D C
4–M4
CPU
B
5
A ± 0.2
Expansion
I/O Unit
D
230
120
2–M4
110 ± 0.2
230
I–10
I–10
C ± 0.2
I
I
I/O
Link
Unit
Dimensions and Installation Section 2–3
16
Model
CPU
I/O Unit
I/O Unit
Analog
Timer
Unit
C20K
C28K
C40K
C60K
C16P
C4K
C4K
–TM
A
±0.2
240
240
290
340
145
31
31
B
250
250
300
350
155
40
40
C±0.2
100
100
100
120
100
100
100
D
110
110
110
140
110
110
110
E
5
5
5
15
5
5
5
F
15 to 40G15 to 35H20 to 40I80 to 130
Attach End Plates (PFP–M) to both ends (as shown below) when connecting
CPUs, Expansion I/O Units, or Analog Timer Units to a DIN Rail. It is also
recommended that a Spacer (PFP–S) be installed between a CPU and Expansion I/O Unit when they are mounted horizontally.
XX
510 10
End plate
DIN Rail
Spacer End plate
CPU I/O Unit
Mounting screws are included with CPUs, Expansion I/O Units, and Analog
Timer Units. They must be purchased separately for I/O Link Units.
2–4 I/O Connecting Cable
Applicable connecting cable will vary according to which Units are connected
and whether they are mounted horizontally or vertically. All Expansion I/O
Units except the C16P and C4K use C20P–CN501 cable (5 cm) for horizontal mounting and C20P–CN411 cable (40 cm) for vertical mounting. The
C16P and C4K cannot be mounted vertically. The C16P can use either of the
above–mentioned cables for horizontal mounting. The C4K can use only
C4K–CN501 cable (5 cm). For connecting I/O Link Units, use C20P–CN711
cable (70 cm).
CAUTION:
Always 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 Connecting
Cable) for connecting Expansion I/O Units can cause serious damage to the
Units.
I/O Connecting Cable Section 2–4
17
The following diagrams illustrate the appropriate cables for connecting CPUs,
Expansion I/O Units, and I/O Link Units either horizontally or vertically.
5 to 30 cm
I/O Connecting
Cable C20P–CN501
100 to 200mm
100 to 200mm
Horizontal Mounting
CPU
I/O Unit
CPU
I/O Unit
I/O Unit
CPU
I/O Link Connecting
Cable C20P–CN711
I/O Link
Unit
I/O Link
Unit
I/O Link
Unit
Vertical Mounting
I/O Connecting
Cable C20P–CN411
I/O Link Connecting
Cable C20P–CN711
I/O Link Connecting
Cable C20–CN711
I/O Connecting
Cable C20P–CN411
One Analog Timer Unit can be connected directly to a CPU or to any combination of a CPU and Expansion I/O Units. In either case, as shown in the following diagram, the Units must be mounted horizontally.
Analog
Timer Unit
Connecting Cable
C4K–CN501
Analog
Timer Unit
Connecting Cable
C4K–CN501
CPU
CPU
I/O Unit
Connecting Cable
C20P–CN501
Connecting Analog Timer
Units
I/O Connecting Cable Section 2–4
18
Connecting I/O Link Units One I/O Link Unit can be connected directly to a CPU or to any combination
of a CPU and Expansion I/O Units. It cannot be used in the same PC System
with an Analog Timer Unit.
Connection Procedure Follow these four steps to connect Expansion I/O Unit, Analog Timer, and I/O
Link Unit Connecting Cables.
1, 2, 3... 1. Remove the connector cover from the CPU, using a screwdriver if nec-
essary.
2. Insert one of the cable’s connectors into the cover. (Once inserted, the
connector cannot be removed.)
3. Reinsert the cover/connector combination into the CPU.
4. Repeat this procedure on the other end of the cable.
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 given
situation will depend on the desired transmission distance and the particular
Units which need to be connected.
All–plastic optical fiber cable (APF) is for short–distance transmission (up to
20 m) and can be used only by Units with the suffix ”–P” attached. Plastic–
clad optical fiber cable (PCF) is for middle–distance transmission (up to 200
m for Units with ”–P” and 800 m for Units without ”–P”). Crystal optical fiber
cable (AGF) is for long–distance transmission (up to 3 km) and can be connected only to certain Link Adapters.
Although laying optical fiber cable does not basically differ from laying wire
cable, 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 (power
failure, disconnection, etc.) in one of the Units will cause all the subsequent
Units to cease operating. You can use Link Adapters to prevent this type of
situation from occuring. Even if a power failure occurs in a Unit connected to
a branch line of a Link Adapter, the Link Adapter will bypass that Unit and
continue to transmit signals to the other Units. You can also use Link Adapters for branching and for converting between various types of wire and optical cable. For details on these and other functions of Link Adapters, refer to
the Link Adapter manual.
I/O Connecting Cable Section 2–4
19
2–5 Wiring CPUs and Expansion I/O Units
Power Supply Use a commercially available 24–VDC, 100– to 120VAC, or 200– to
240–VAC power supply (depending on your model) for the CPU. When an
Expansion I/O Unit(s) or an I/O Link Unit is used, the power supply must also
be connected to each of these Units. Where possible, use independent
power sources for the inputs, the output loads, and the CPU. All of the CPUs
and Expansion I/O Units may be connected to the same power source. If a
CPU and an Expansion I/O Unit are connected to separate power supplies,
then the CPU (as well as the Programming Console, etc.) will not operate
unless power is turned on to the Expansion I/O Unit.
Wiring The following diagram illustrates the proper wiring for CPUs and Expansion
I/O Units with the suffix ”–A.” These models use a power supply of 100 to 240
VAC, with an operating voltage range of 85 to 264 VAC. The internal noise–
reduction system in these Units is sufficient for general power line noise, but
ground noise can be greatly reduced by using a 1:1 insulating transformer.
Ground only the primary side of the transformer. To prevent voltage drop, use
wires 2 mm2 or less in cross sectional area, twisting them as shown in the
diagram. When power is turned on, the incoming current will be approximately 10 A.
Breaker
Insulating
transformer
1:1
M3.5 screws
Wiring CPUs and Expansion I/O Units Section 2–5
20
Connect an I/O Link Unit as shown in the following diagram, using M4 terminal screws.
M4 screws
100 to 240 VAC
Insulating
transformer
1:1
Breaker
The following diagram illustrates the proper wiring for CPUs and Expansion
I/O Units with the suffix ”–D.” These models use a power supply of 24 VDC
with an operating voltage range of 20.6 to 26.4 VDC. Be careful to connect
the positive and negative terminals correctly. When power is turned ON, the
incoming current will be approximately 30 A.
Breaker
M3.5 screws
Ground The Line Ground (LG) terminal is a noise filter neutral terminal which does
not 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 2
mm
2
(AWG 14) to the GR terminal, to avoid electrical shock. Ground resis-
Wiring CPUs and Expansion I/O Units Section 2–5
21
tance must be less than 100 Ω. Do not use a ground–wire longer than 20 m.
Care must be taken because ground resistance is affected by the nature of
the ground, water content, season, and the amount of time that has elapsed
since the wire was laid underground.
CPU operation may be adversely affected if the ground–wire is shared with
other equipment, or if grounding is attempted by attaching the ground–wire to
the metal superstructure of a building. When either Expansion I/O Units or
I/O Link Units are used, they also require grounding at the GR terminal.
These may all be included on the same ground.
LG
GR
Wiring CPUs and Expansion I/O Units Section 2–5
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