APC BackUPS ES (old) cable wiring pinout

connector or cable wiring

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

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9 pin D-SUB male connector
to the UPS

Pinouts.ru > GPS, UPS, Switches and other devices cables and adapters schematics > Pinout of APC BackUPS ES (old) cable wiring and layout of 9 pin D-SUB male connector and 9 pin D-SUB male connector	Document status:	unknown
Source(s) of this and additional information: www.apcupsd.com Contributor: William Stock	0 reports
Last updated at Thu Jan 10 2008. Submit additions or corrections for this document.	Is this document correct or incorrect? What is your opinion?

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