APC SC620 pinouts
The connector/pinout information may be applied to the APC model SC620
APC Smart UPS DB9 cable pinout APC Part# 940-0024C, # 940-0024B, # 940-0024D or 940-1524(black cable). Compatible with most APC UPSs that have a DB9 serial port. Should work with APC PowerChute or Apcupsd(UPS Server for Linux)