APC BackUPS ES (old) cable wiring

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connector or cable wiring APC part # 940-0119A

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

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

The BackUPS ES has a straight through serial cable with no identification on the plugs.

     computer           ----------- BackUPS-ES ----------------- 
     DB9-M              DB-9F 
     pin    signal      pin 
      
      4      DSR   ->    4 --+ 
                             |  diode   resistor 
      6      DTR   ->    6 --+---->|----/\/\/\---o kill power 
      
      1      DCD   <-    1 --+ 
                             | 
      2      RxD   <-    2 --+----------------+--o low battery 
                                              | 
      7      RTS   ->    7 --------+--/\/\/\--+ 
                                   | 
                                   +--/\/\/\--+ 
                                              | 
      8      RI    <-    8 --+----------------+--o on battery 
                             | 
      9      CTS   <-    9 --+ 
      
      5      GND   ---   5 ----------------------o ground 
      
      3      TxD         3 nc 

Notes

References

Category:Miscellaneous Cables

 

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