|PM-P006UPS-R10 - how to set up to support for AT-mode?|
|How to setup this DC-DC module for AT/ATX-power modes?|
You can short signal pins 'PS_ON and GND' together on CN2 connector to support AT-power mode
If your motherboard need ATX-mode:
You can use for all 4*pins on CN2:
If your motherboard need AT-mode:
You no needed to use above pin#1 and pin#2 or disconnect it and then, You can short pin#3 and pin#4 by wire/jumper!