The inverter output side cannot connect to the capacitor or surge absorber. Otherwise, it may
cause frequent inverter protection and even damage the inverter.
In case the motor cable is too long, it may generate electrical resonance easily due to the
impact of distributed capacitance, thus damaging the motor insulation or generating higher
leakage current to invoke over current protection of the inverter. When the length of motor cable
is longer than 100 meters, it needs to install a AC output reactor.
F) Earth terminal PE:
This terminal shall be earthed reliably, with resistance of earth cable of less than 0.1Ω.
Otherwise, it may cause fault or damage the inverter.
Do not share the earth terminal and zero line of the power supply.
3.2.5 Control terminal and connection
1) Control terminals and connection:
Fig.3-8 Layout of Control Circuit Terminals
2) Function description of control terminal:
Table 3-3 Description of Control Terminal Function of MD320 Inverter
Type Terminal Symbol Terminal Name Function Description
Power Supply
+10V-GND
External 10V
power supply
Provide +10V power supply for external- units,
and the maximum output current is 10mA.
It is generally used as the operating power
supply for the external potentiometer. The
potentiometer resistance range is 1kΩ
～
5kΩ.
+24V-COM
External 24V
power supply
Provide +24V power supply for external units. It
is generally used as the operating power supply
for digital input/output terminals and the external
sensor.
The maximum output current is 200mA.
OP
External power
input terminal
Connect to 24V by default upon delivery
When external signal is used to drive DI1
～
DI5, OP needs to connect to the external power
supply and disconnect from the +24V power
terminal
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