HP r5500 User Manual

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Installation 19 
  IMPORTANT:  Power management software requires the communications port to be appropriately cabled 
to the host computer. 
 
 
Connecting the REPO port 
  WARNING:  The pins on the REPO port are polarity sensitive. Be sure to verify polarity 
while connecting the REPO port. 
 
  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.