AOpen DE5500 Series, User Manual, Page: 17 / 22

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Ground & SW+ are for connection to extend power switch, and PS_ON is a signal to present the
system power on/off status, when PS_ON signal is low, then system is in power on status
when PS_ON signal is high, then system is in power off status
This is a screwless type spring clamp pluggable terminal block, you can insert a wire by press
the button on the terminal, please refer to the procedure below.
Step 1 please prepare a pin or rod that hard enough for pushing the button on the terminal block
Step 2 push the button in the end and hold it
Step 3 insert the wire into the hole and make sure the stripped portion is fully inserted
Step 4 release the pin or rod then the wire will clamp by the terminal block
step1 step2 step3 step4