Relay Control Circuit - Veichi AC310 Service Manual

2.5 Relay Control Circuit

1. Circuit composition
Controls the 24V power switch according to the received DSP drive signal to control
the relay to close and disconnect
2. Failure type
Operation undervoltage, soft start resistor burned out, no vibration
3. Inspection Methods
Static test Overhaul according to the various device detection methods provided in the
appendix Dynamic test
After static testing, rule out device abnormalities.
When the DC adjustable voltage source is used to energize the bus voltage, the signal
source from the CPU changes from high level (5V) to low level (RCE level changes from
high to low and the main relay opens), and when the voltage is under-voltage, the signal
source from the CPU changes from low to high (5V) (RCE level changes from high to low
and the main relay opens), and the signal source from the CPU changes from low to high
(5V) (RCE level changes from high to low and the main relay opens).
AC310 Universal AC Drive Service Manual
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