pinout (распиновка)

APC Back-UPS Cable (PN 940-0020B) pinout

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9 pin D-SUB MALE connector  to the UPS

DB-9 Male (UPS end) DB-9 Female (PC end) Signal Name N/C 1  N/A N/C 2  N/A N/C 3  N/A 1 4  Data Terminal Ready 4,9 5  Signal Ground* N/C 6  N/A N/C 7  N/A 2 8  Clear To Send N/C 9   N/A

9 pin D-SUB FEMALE connector  to the computer

* There are two different configuration, one in which both 4 and 9 on the male end are connected to 5 on the female end, and one in which only 4 on the male end is connected to 5 on the male end.