Xtreme Power Conversion P91 - 5.2 CNTL board (Control Board); 5.3 Communication board; 5.4 EMI board

Xtreme Power Conversion Corporaon
P91, TX91, TX91L, TXVR Service Manual
Page 12
Uninterrupble Power Supply
5.2 CNTL board (Control Board)
The CNTL board is the core of the UPS system. It controls the acons of the semiconductors and other mechani-
cal switches, the display of the LED/LCD, the sound of the buzzer, the communicaon with the computer, and
other important tasks.
5.3 Communicaon board
The Communicaon board provides RS232/USB interface to the users, and it also provide one EPO port
to cut o the output immediately.
5.4 EMI board
The EMI board can prevent the UPS from external electronic/magnec noise generated by other electronic
systems, and also prevent other systems from the noise generated inside of the UPS system. And the MOV is also
on the EMI board which can absorb the surge to protect the UPS system.