APC Smart UPS cable

pinout

PN 940-0024C (black cable). Should work with APC PowerChute Plus, PowerChute V/S, PowerChute Pro software

9 pin D-SUB male connector  to the UPS

UPS Signal Name DB-9 Male (UPS end) DB-9 Female (PC end) PC Signal Name TX / AC Fail 2 2 Rx, Received Data RX / Shutdown 1 3 Tx, Transmitted Data Common 9 5 GND At the PC end: pins 1,4 (DCD, DTR) shorted; pins 7,8 (RTS, CTS) shorted.

9 pin D-SUB female connector  to the PC

Source:www.pinouts.ru