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Multi-inverter source wiring mode
Multi-inverter uses internal 24V source wiring Multi-inverter uses external 24V source wiring
Note: Under this connection mode,X terminals of different frequency converters cannot be connected in parallel,
otherwise it may cause X malfunction: if the X terminal needs to be connected in parallel (between different
frequency converters), the diode (anode connected to X) shall be connected in series at the X terminal, and the
diode shall meet the following requirements: IF>40mA, VR>40V.
(2) Digital output terminal
When the digital output terminal needs to drive the relay, freewheeling diodes should be installed on both sides
of the relay coil. Otherwise, it is easy to damage the DC24V power supply. The driving capacity is no more than
50mA.
Note: the polarity of freewheeling diode must be correctly installed. As shown in the figure below. Otherwise,
when the digital output terminal has output, the DC24V power supply will be burnt out immediately. Selection
standard of freewheeling diode: the reverse withstand voltage is greater than 5 ~ 10 times of the load voltage,
and the current is greater than the load current.
(3) Relay output terminal
Inductive loads (relays, motors, indicator lights) can cause voltage spikes when the current is cut off. The relay
contacts are protected by varistors, and the inductive load is equipped with absorption circuits, such as varistors,
RC absorption circuits, diodes, etc., to ensure the minimum interference current when turning off.
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