2-20
2-2 Wiring
2
Design
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
mm
2
), 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
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
64
Thermistor
PLC
HO2AMFMTHFW8
CM1 5 3 11413 11 AL1
L O OI AMI P24 PLC CM1
7 6 4 2 15 CM2 12 AL0 AL2
Terminal screw size M3 Tightening torque 0.7 N·m (0.8 max.)
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