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Note:
(1) When using analog input, filter capacitor or common mode inductor should be installed between AI and
GND.
(2) The resistance ranges of the potentiometer connected between the control terminal 10V and GND is 5 ~
10K.
(3) Analog input and output signals are vulnerable to external interference. Shielded cables must be used for
wiring and well grounded. The length of wiring should be as short as possible and no more than 20m.
2-4-3. Digital I/O wiring
(1) Digital input terminal
Generally, shielded cables are required, and the wiring distance should be as short as possible, not more than
20m. When active driving mode is selected, necessary filtering measures should be taken for the crosstalk of
power supply. The contact control mode is recommended, and the specific wiring diagram is as follows:
Single inverter leakage wiring mode
Single VFD uses internal 24V leakage wiring Single VFD uses external 24V leakage wiring
The most common wiring method is to use the internal 24V power supply of the inverter.
Short circuit the COM and 24V of the inverter, connect the 0V of the frequency converter with the 0V of the
external controller, connect the X terminal with the signal terminal of the external controller, and control the
inverter through the ON-OFF of the loop.
If external 24V is used, the COM terminal of the inverter shall be connected to the external 24V, and the
external power supply 0V shall be connected to the corresponding X terminal through the control contact of the
external controller.
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