UPS devices  > Powercom pinouts
Signal Name
DB-9 Male
(UPS end)
DB-9 Female
(PC end)
Signal Name
RxD 1 2  
AC Fail 2 9 Contact closure
n/a 3 1 not used
GND 4 5 Common ground
Bat Low 5 6 Contact closure
TxD 6 3  
GND 7 8  
RTS 8 7  
DTR 9 4  

AC Fail and Bat Low - normally open (shorted to GND when active).

9 pin D-SUB male connector layout
9 pin D-SUB male connector
at the UPS
9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the computer
According to 3 reports in our database (2 positive and 1 negative) this pinout should be correct.

Is this pinout
PowerCom King UPS cable visual pinout:
PowerCom King UPS cable diagram
click to enlarge
Source(s) of this and additional information: UPS FAQ in russian
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