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5
Application Precautions
xvi
•
Interlock circuits, limit circuits, and similar safety measures in external circuits
(i.e., not in the Programmable Controller) must be provided by the customer.
•
Always use the power supply voltages specified in the operation manuals. 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-circuit-
ing in external wiring. Insufficient safety measures against short-circuiting 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.
•
Leave the label attached to the Unit when wiring. Removing the label may re-
sult in malfunction if foreign matter enters the Unit.
•
Remove the label after the completion of wiring to ensure proper heat dissipa-
tion. Leaving the label attached may result in malfunction.
•
Use crimp terminals for wiring. Do not connect bare stranded wires directly to
terminals. Connection of bare stranded wires may result in burning.
•
Wire all connections correctly.
•
Double-check all wiring and switch settings before turning ON the power sup-
ply. Incorrect wiring may result in burning.
•
Mount Units only after checking terminal blocks and connectors 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.
•
Do not lay communications cables near power lines or high-voltage lines.
•
Always lay communications cables in ducts.
•
Do not pull on the communications cables or bend the communications cables
beyond their natural limit. Doing either of these may break the cables.
•
Do not place objects on top of the communications cables or other wiring lines.
Doing so may break the cables.
•
Before touching a Unit, be sure to first touch a grounded metallic object in order
to discharge any static built-up. Not doing so may result in malfunction or dam-
age.
•
When transporting or storing Units, place them in special packing boxes and
do not allow them to be subject to excessive shock or vibration during trans-
portation.