Wiring Control Circuit Terminals; Arrangement Of The Control Circuit Terminal Block; Selecting The Input Control Logic - Omron 3G3RX User Manual

Wiring Control Circuit Terminals

• Terminals L and CM1 are insulated from each other via the input and output signal common
terminals.
Do not short-circuit or ground these common terminals.
Do not ground these common terminals via external equipment. (Check the external equipment
ground conditions.)
• For wiring the control circuit terminals, use twisted shielded cables (recommended size: 0.75
2
mm ), and connect the shielded cable to each common terminal.
• The control circuit terminal connection cables should be 20 m or less.
• Separate the control circuit terminal connection cables from the main circuit cable (power cable)
and the relay control circuit cable.
• For the connection of the TH (thermistor input) terminal, twist cables with the terminal CM1
individually, and separate them from other PLC common cables.
Since a weak current flows through the thermistor, the thermistor connection cable must be
separated from the main circuit cable (power cable). The thermistor connection cable should be
20 m or less.
• To use a relay for the multi-function output terminal, connect a surge-absorbing diode in parallel
with the coil.
• Do not short-circuit the analog power supply terminals (between H and L) and/or the interface
power supply terminals (between P24 and CM1).
Doing so may result in failure of the Inverter.
Arrangement of the Control Circuit Terminal Block
H O2 AM
L O OI AMI
Terminal screw size M3
 Selecting the Input Control Logic
By factory default the terminal FW and the multi-function input terminal are set to source logic
(PNP).
To change the input control logic to sink logic (PNP), remove the short-circuit bar between the
terminals PLC and CM1 on the control circuit terminal block, and connect it between the terminals
P24 and PLC.
TH FW 8 CM1 5
PLC CM1 7 6 4
FM TH FW 8
CM1
P24 PLC CM1
7
Tightening torque 0.7 N·m (0.8 max.)
PLC
Thermistor
5 3 1 14
6 4 2 15 CM2
2-2 Wiring
13 11 AL1
12 AL0 AL2
2-20
2