APC BackUPS Pro

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connector or cable wiring APC Part# 940-0095B. Should work with APC PowerChute Pro software.

9 pin D-SUB male connector layout 9 pin D-SUB male connector to the UPS

9 pin D-SUB female connector diagram 9 pin D-SUB female connector to the computer

UPS Signal Name DB-9 Male (UPS end) DB-9 Female (PC end) PC Signal Name
RX / Shutdown 1 via R=4k to 3 TxD, also connected via R=4kOhm to pin 1 (DCD)
TX / AC Fail 2 2,9 RxD, RI
Common 4,9 5 GND

At the PC end pins 4,6,8 (DTR, CTS, DSR) shorted.

    1-----------------^^^---\-----------3 
                       R     \-----^^^--1 
                                    R 
    2-----------------------------------2 and 9 (shorted) 
    4----\ 
          |---------------------------- 5 
    9----/                            
                                        4 and 8 and 6 (shorted) 
    R=4KOhm. 

Another variant:

    Signal Computer                  UPS 
                DB9F                     DB9M 
          DTR    4   ----* 
          CTS    8   ----| 
          DSR    6   ----| 
          DCD    1   ----* 
          GND    5   ---------------*----  4  Ground 
                                    | 
                                    *----  9  Common 
          RI     9   ----* 
                         | 
          RxD    2   ----*---------------  2  On Battery 
          TxD    3   ----------[####]----  1  Kill UPS Power 
                               4.7K ohm 

Notes

References

Category:Miscellaneous Cables

 

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