APC Back-UPS Pro PNP BP280PNP pinouts
The connector/pinout information may be applied to the APC model Back-UPS Pro PNP BP280PNP
APC Dumb UPS cable (simple) pinout APC Part# 940-0020 (grey cable). Should work with APC PowerChute Plus software.
APC BackUPS Pro PNP cable pinout APC part # 940-0095A