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PS-ON Signal is a remote on/off signal to a personal computer power supply unit. It turns on the power supply when it is switched from high to low and turns off the power supply when switched from low to high, or open-circuited. 
- "SG6516 PC Power Supply Supervisors" (PDF). Fairchild Semiconductor. Archived from the original (PDF) on 2018-08-21. Retrieved August 21, 2018.
- "Desktop Platform Form Factors Power Supply Design Guide" (PDF). Intel Corporation. Retrieved August 21, 2018.