Displays, Audio Alarm And Control Button - FSP Technology EP450 series Specifications

10 Displays, Audio Alarm and Control Button

10.1 Control button
ON/ OFF Button: Push it to turn on UPS, and push again to turn off UPS. (Please refer
to Chapter 3 for cold start & AC start)
10.2 Audio alarm
The buzzer is controlled by pin16 of CPU. When CPU sends a HI signal to buzzer from
pin16, buzzer is beeping. And CPU sends LOW signal to stop buzzer.
10.3 Display ( Figure S-8)
There are 3 LEDs on front panel.
While control button is turned on, CPU sends a HI signal to turn on LED.
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Figure S-8 Display Circuit
Rev. A