Rackmount Solutions XRT Series - Manual (Page 39)

38
REMOTE DIRECT COMMUNICATIONS
Pin 1: Not Used
Pin 2: LBW Output signal from UPS (RS232 levels)
High signal (+3 to +12 volts)= Low
Battery Warning
Pin 3: UPS Shutdown Input signal to UPS, Shuts down
UPS (RS232 levels)
High signal (+3 to +12 volts) = UPS OFF
Pin 4: AC Fail NO. Output signal from UPS, open
collector, High impedance = AC OK
Low impedance to ground = AC Failed
Pin 5: Ground Common Return
Pin 6: Low Battery Warning Output signal from UPS, open
collector
High impedance = OK
Low impedance to ground = Low
Battery Warning
Pin 7: AC Fail NC Output signal from UPS, open
collector High impedance = AC Failed
Low impedance to ground = AC OK
Pin 8: AC Fail Logic Signal Output signal from UPS, logic level
Logic High (+3 to +12 volts) =
AC failed
Logic Low (0 volts) = AC OK
Pin 9: Remote Shutdown Input signal to UPS, pulled to 5
VDC through 10 K ohms
>2.4 VDC = Normal output
<0.8 VDC = Output off