APC BackUPS dumb cable (on-battery only)

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connector or cable wiring APC Part# - 940-0023A

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

This cable can only be used on voltage-signalling UPSes, and apparently only provides the On Battery signal. As a consequence, this cable is pretty much useless, because all APC UPSes support more than just On Battery.

     Signal Computer                  UPS 
            DB9F                     DB9M 
      DCD    1   --------------------  2  On Battery 
      
                   3.3K ohm 
      TxD    3   --[####]-* 
                          | 
      DTR    4   ---------* 
      GND    5   ---------------*----  4  Ground 
                                | 
                                *----  9  Common 
                                 

9 pin D-SUB male connector diagram

9 pin D-SUB male connector to the UPS

Notes

References

Category:Miscellaneous Cables

 

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