SMPS630 Quick Reference AC- LOSS This output is an open collector output that will turn on the transistor after the SMPS is powered on. and it is delayed 3 seconds, and it will turn off immediately after you disconnect the SMPS from your power line, however, this output will not function if you are using the standby switch option. This output was made available to control your turn on delay circuit or any other function is possible. 12V AUX This output is a 12VDC 300mA maximum coming from the standby SMPS, and it is totally independent from all other outputs on the SMPS. Stand By SMPS stand by switch to be connected here to turn ON / OFF the SMPS, and small switch will do the job DC-Error This input is used to shutdown the SMPS in case of amplifier failure, however this input needs special circuit to trigger it. A good example is the (First One amplifier DC detect board). +-15 V Regulated output of the +-15 voltage Output connectors table Connector reference on PCB Function AC-LOSS Pin 1 --> Collector Pin 2 --> Emitter 12V AUX Pin 1 --> +12 VDC Pin 2 --> GND +-15V Pin 3 --> +55 VDC Pin 4 --> GND Pin 5 --> GND Pin 6 --> -55 VDC Type Output Isolated output Pin 1 --> -15 VDC Pin 2 --> GND Pin 3 --> +15 VDC Pin 1 --> +18 VDC Pin 2 --> GND Main SMPS outputs Note 300 mA Output 200 mA Output 200 mA Isolated output 350 mA Output 4.5A Output 4.5A Pin 1 & 2 from the main SMPS output which is marked VDR on the PCB is for CLASS_D amplifier boot strap supply, and you MUST connect the GND of that output to the HV- if your application requires that. That is why the GND of that output is NOT connected to anything.