Sync input is a 2.5 mm audio jack stereo. The counterpart is a 2.5 mm audio jack plug. The scheme of this plug for synchronization signaling, see pic. 1.
Pic. 1
Pin1: Sync input
Pin2: Reserved
Pin3: Common wire
Parameters of the synchronization control pulse are shown in pic. 2.
Pic. 2
Note! In APS-7306LS power supply the signal of pin 2 input of the sync connector is also used to reset network settings to default. APS-3xxxLS power supplies do not use this signal.