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5
Application Precautions
xxii
•
Be sure that terminal blocks and connectors are connected in the specified
direction with the correct polarity. Not doing so may result in malfunction.
•
Leave the labels attached CPM1 or CPM2A Units when wiring to prevent wir-
ing cuttings from entering the Units.
•
Attach the labels supplied with CPM1A or CPM2C Units or provide other pro-
tective covers when wiring to prevent dust or wiring cuttings from entering the
Units.
•
Remove the labels after the completion of wiring to ensure proper heat dissipa-
tion. Leaving the labels attached may result in malfunction.
•
Use the connectors and wiring materials specified in the relevant manual(s).
•
Be sure to wire according to the relevant manual(s). Incorrect wiring may result
in burning.
I/O Connection and System Startup
•
Disconnect the functional ground terminal when performing withstand voltage
tests.
•
Always use the power supply voltages specified in the operation manual(s). 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.
•
Do not apply voltages to the input terminals in excess of the rated input voltage.
Excess voltages may result in burning.
•
Do not apply voltages or connect loads to the output terminals in excess of the
maximum switching capacity. Excess voltage or loads may result in burning.
•
Double-check all wiring and switch settings before turning ON the power sup-
ply. Incorrect wiring may result in burning.
•
Check the user program for proper execution before actually running it on the
Unit. Not checking the program may result in an unexpected operation.
Handling Precautions
•
When using, storing, or transporting the product, keep within the specifications
listed in the relevant manual(s).
•
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 PC.
•
Force-setting/force-resetting any bit in memory.
•
Changing the present value of any word or any set value in memory.
•
Before touching a Unit, be sure to first touch a grounded metallic object to dis-
charge any static built-up. Not doing so may result in malfunction or damage.
•
Do not touch the Expansion I/O Unit Connecting Cable while the power is be-
ing supplied to prevent any malfunction due to static electricity.
•
Do not pull on the cables or bend the cables beyond their natural limit. Doing
either of these may break the cables.
•
Do not place objects on top of the cables. Doing so may break the cables.
•
When disposing of Units or other products, be sure to do so according to local
laws and regulations.
•
When using a Temperature Sensor Unit with a thermocouple input
(CPM1A-TS001/002, CPM2C-TS001), observe the following precautions:
•
With the CPM1A-TS001/002, do not remove the cold junction compensa-
tor attached at the time of delivery. If the cold junction compensator is
removed the Unit will not be able to measure temperatures correctly.