HP Parallel Uninterruptible Power System - Manual (Page 45)

UPS installation 45
2. Attach the UPS front bezel.
Connecting the ground bonding cable
The ground bonding screw is provided as an attachment point for conductors. Use a ground bonding cable
if the rack contains any conductors for the purpose of functional grounding or bonding of ungrounded metal
parts.
The ground bonding cable is not included.
Connecting the REPO port
This UPS has two REPO ports, normally-open and normally-closed. Before connecting to a REPO port, review
and observe all warnings.
WARNING: The pins on the REPO port are polarity sensitive. Be sure to verify polarity while
connecting the REPO port in parallel with other HP UPSs.