Omron CS1W-CRM21 - 5 Application Precautions

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Application Precautions 5
5 Application Precautions
Observe the following precautions when using a CompoNet Network.
• When more than one CompoNet system use Flat Cables, always sepa-
rate the Flat Cables from each other by at least 5 mm regardless of
whether Flat Cable I or II cables are used. Do not bundle the Flat Cables.
This is to prevent unstable operation of the system due to interference.
• 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, emergency stop circuits, and similar safety
measures in external circuits (i.e., not in the Programmable Controller)
must be provided by the customer.
• Always configure control circuits so that they turn ON power to the I/O
Slave Units before turning ON power to the PLC. If the PLC power supply
is turned ON first, normal operation will not be possible temporarily.
• Do not attempt to disassemble, repair, or modify any Units. Any attempt to
do so may result in malfunction, fire, or electric shock.
• When installing the Unit, ground to 100
Ω min.
• Make sure that all the Backplane mounting screws, Slave Unit mounting
screws, terminal block screws, and cable connector screws are tightened
to the torque specified in the relevant manuals. Incorrect tightening torque
may result in malfunction.
• Wire all connections correctly according to instructions in this manual.
• Confirm the orientation and polarity before connecting terminal blocks or
connectors.
• Confirm voltage specifications before wiring communications lines, power
supplies, and I/O circuits. Incorrect specification may result in malfunc-
tions.
• Install external breakers and take other safety measures against short-cir-
cuiting in external wiring. Insufficient safety measures against short-cir-
cuiting may result in burning.
• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.
• Remove the label after the completion of wiring to ensure proper heat dis-
sipation. 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 wiring and switch settings before turning ON the power
supply. Incorrect wiring may result in burning.
• Make sure that the terminal blocks, connectors, expansion cables, com-
munications cables, and other items with locking devices are properly
locked into place. Improper locking may result in malfunction.
• Disconnect the functional ground terminal when performing withstand
voltage tests. Not disconnecting the functional ground terminal may result
in burning.
• Always use the power supply voltages specified in the operation manual.
An incorrect voltage may result in malfunction or burning.