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Application Precautions
• Disconnect the LG terminal on the Power Supply Unit from the GR terminal
before executing insulation resistance or withstand voltage tests.
• Be sure that all the mounting screws, terminal screws, and cable connector
screws are tightened to the torque specified in this manual. Incorrect tighten-
ing torque may result in malfunction.
• Do not apply a force greater than 100 N on the terminal block when tightening
the terminals.
• Do not drop the product or subject it to excessive vibration or shock.
• 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.
• Double-check all wiring and switch settings before turning ON the power sup-
ply. Incorrect wiring may result in burning.
• Wire correctly. 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.
• 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. (This includes changing the start-
up operating mode.)
• Force-setting/force-resetting any bit in memory.
• Changing the present value of any word or any set value in memory.
• Resume operation only after transferring to the new CPU Unit the contents of
the DM Area, HR Area, and other data required for resuming operation. Not
doing so may result in an unexpected operation.
• 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 or other wiring lines. Doing so may
break the cables.
• Use crimp terminals for wiring. Do not connect bare stranded wires directly to
terminals. Connection of bare stranded wires may result in burning.
• When replacing parts, be sure to confirm that the rating of a new part is correct.
Not doing so may result in malfunction or burning.
• 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 wiring crossovers between terminals, the total current for both terminals
will flow in the line. Check the current capacities of all wires before wiring cross-
overs.
• The following precautions apply to Power Supply Units with Replacement Noti-
fication.
• When the LED display on the front of the Power Supply Unit starts to alter-
nately display "0.0" and "A02" or the alarm output automatically turns OFF,
replace the Power Supply Unit within 6 months.
• Separate the alarm output cables from power lines and high-voltage lines.
• Do not apply a voltage or connect a load to the alarm output that exceeds
the rated voltage or load.
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