VF-AT series frequency converter power frequency-variable frequency switching circuit

In the figure, Ro and So are the control power supply terminals of
the inverter ; F is the forward running and stop command terminal} S3 is the power frequency/variable frequency switching terminal [ When S3 is in the "ON" state (KA3 contact is closed), it is the power frequency operation; when S3 is in the "OFF" state (KA3 contact is disconnected), it is variable frequency operation]; OUTi and OUT2 are switching execution terminals ( when OUTi is in the "ON" state, it is the signal to switch to frequency conversion operation; OUT2 is in the "ON" state) ” state is the signal to switch to the power frequency operation )} FLA and FLB are fault signal output terminals; RES is the reset terminal ; CC is the contact input common terminal.