Omron TJ1-DRT Hardware Reference Manual page 11

Safety warnings and precautions
Caution
Always connect to a class-3 ground (to 100Ω or less) when install-
ing the Units.
Not connecting to a class-3 ground may result in electric shock.
Caution
Always turn off the power supply to the system before attempting
any of the following.
Not turning off the power supply may result in malfunction or elec-
tric shock.
- Mounting or dismounting expansion Units, CPU Units, or any
other Units.
- Assembling the Units.
- Setting dipswitches or rotary switches.
- Connecting or wiring the cables.
- Connecting or disconnecting the connectors.
Caution
Be sure that all mounting screws, terminal screws, and cable con-
nector screws are tightened to the torque specified in this manual.
Incorrect tightening torque may result in malfunction.
Caution
Leave the dust protective label attached to the Unit when wiring.
Removing the dust protective label may result in malfunction.
HARDWARE REFERENCE MANUAL
Caution
Remove the dust protective label after the completion of wiring to
ensure proper heat dissipation.
Leaving the dust protective label attached may result in malfunc-
tion.
Caution
Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals.
Connection of bare stranded wires may result in burning.
Caution
Double-check all the wiring before turning on the power supply.
Incorrect wiring may result in burning.
Caution
Wire correctly.
Incorrect wiring may result in burning.
Caution
Mount the Unit only after checking the terminal block completely.
Caution
Be sure that the terminal blocks, expansion cables, and other
items with locking devices are properly locked into place.
Improper locking may result in malfunction.
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