Connecting the repo port, Connecting to a normally-open contact – HP Parallel Uninterruptible Power System User Manual
Page 30
UPS installation 30
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.
WARNING:
To meet the requirements stated in NEC (NFPA 70) Articles 645-10 and 645-11, a
UPS installed in a computer equipment room must be connected to a REPO circuit.
NOTE:
Wire the connector block using stranded, nonshielded wire (AWG #22 - #18, or
equivalent).
HP recommends using different colors for the positive and negative wires.
To avoid inadvertant EPO:
•
Minimize wire strain while connecting the REPO port.
•
Avoid allowing the wires to hang in the rear of the UPS.
•
Use tie wraps and tie wrap blocks to secure the wires tightly to the rack and the rear of the UPS.
For more information about the REPO port, see "REPO port (on page
)" .
For information about verifying the REPO connection, see "Verifying the REPO port connection (on page
)"
.
Connecting to a normally-open contact
IMPORTANT:
The remote switch must be in the open position to enable power to the UPS output.