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5
Application Precautions
xv
Caution
Failure to abide by the following precautions could lead to faulty operation or the
PLC or the system or could damage the PLC or PLC Units. Always heed these
precautions.
•
Use the Units only with the power supplies and voltages specified in the opera-
tion manuals.
•
Take appropriate measures to ensure that the specified power with the rated
voltage and frequency is supplied, particularly in places where the power sup-
ply is unstable.
•
Provide circuit breakers and other safety measures to provide protection
against shorts in external wiring.
•
Do not apply voltages exceeding the rated input voltage to input sections.
•
Do not apply voltages exceeding the maximum switching capacity to output
sections.
•
Always disconnect the LG terminal when performing withstand voltage tests.
•
Always connect to a class-3 ground (to 100
Ω
or less) when installing the Units.
•
Always turn the power supply to the PLC off before attempting any of the fol-
lowing:
•
Mounting or dismounting I/O Modules, CPU Units, Memory Cassettes, or
any other Units.
•
Assembling the Units.
•
Setting the DIP switch or rotary switch.
•
Connecting or wiring the cables.
•
Connecting or disconnecting the connectors.
•
Do not attempt to take any Units apart, to repair any Units, or to modify any
Units in any way.
•
Be sure that all the mounting screws, terminal screws, and cable connector
screws are tightened to the torque specified in this manual.
•
Be sure to attach labels supplied with the CPM1A onto the CPM1A when wiring
in order to prevent wiring cuttings from entering in the Unit.
•
Remove the labels after the completion of wiring to ensure proper heat dissipa-
tion.
•
Use either crimp terminals or single-wire lines for wiring. Do not connect bare
stranded wires directly to terminals.
•
Double-check all the wiring before turning on the power supply.
•
Be sure to check polarity and directions when connecting terminal blocks or
connectors.
•
Be sure that the terminal blocks, Memory Units, expansion cables, and other
items with locking devices are properly locked into place.
•
Check the user program for proper execution before actually running it on the
Unit.
•
Be sure to confirm that no adverse effect will occur in the equipment before
changing the operation mode of the PLC.
•
Be sure to confirm that no adverse effect will occur in the equipment before
executing forced set/reset.
•
Be sure to confirm that no adverse effect will occur in the equipment before
changing the set values or present values.
•
Be sure to resume operation only after transferring to the replaced CPU Unit
the contents of the data memory or hold relay required for resuming operation.
•
Never pull on, bend to extreme angles, or place heavy objects on cables.
•
Install all Units according to instructions in the operation manuals.
Summary of Contents for CPM1A-20CAR-A
Page 3: ...ii...
Page 5: ...iv...
Page 9: ...iv...
Page 29: ...14 System Configuration Section 1 2...
Page 43: ...29 Unit Components Section 2 2...
Page 65: ...51 Wiring and Connections Section 3 4...
Page 123: ...Appendix B Dimensions 2 CPM1 CIF01 90 81 21 30 205 50 56 CPM1 CIF11 90 81 21 30 205 50 61...
Page 124: ...Appendix B Dimensions 3 Dimensions with Peripheral Devices Attached Approx 90 Approx 125...
Page 125: ...Appendix B Dimensions 4...
