Omron SYSMAC CVM1 Series Operation Manual page 16

Application Precautions
! Caution
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• Always turn OFF the power supply to the PC before attempting any of the fol-
lowing. Not turning OFF the power supply may result in malfunction or electric
shock.
• Mounting or dismounting Power Supply Unit, I/O Units, CPU Units,
Memory Cassettes, or any other Units.
• Assembling the Units.
• Setting DIP switches or rotary switches.
• Connecting or wiring the cables.
• Connecting or disconnecting the connectors.
Failure to abide by the following precautions could lead to faulty operation of the
PC or the system, or could damage the PC or PC Units. Always heed these pre-
cautions.
• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal lines,
momentary power interruptions, or other causes.
• 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 voltage 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.
• Do not mount a CVM1D Power Supply Unit in a CVM1 or CV-series PC. Doing
so may result in burning or malfunction.
• Do not mount a CVM1 or CV-series Power Supply Unit on a Duplex CVM1D
PC. Doing so may result in unexpected stoppage of the PC.
• Do not apply voltages to the Input Units in excess of the rated input voltage.
Excess voltages may result in burning.
• Do not apply voltages or connect loads to the Output Units in excess of the
maximum switching capacity. Excess voltage or loads may result in burning.
• Disconnect the functional ground terminal when performing withstand voltage
tests. Not disconnecting the functional ground terminal may result in burning.
• Install the Unit properly as specified in the operation manual. Improper installa-
tion of the Unit may result in malfunction.
• 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.
• 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.
• Double-check all the wiring before turning on the power supply. Incorrect wir-
ing may result in burning.
• Mount the Unit only after checking the terminal block 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.
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