HP R12000 User Manual page 55

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Secure the REPO wires tightly to the rack and the rear of the power unit with tie wraps and tie wrap
blocks after installing the power unit in the rack.
Connecting the R18000DF serial communications port
To flash the UPS firmware, or to communicate with another device, connect a computer interface cable
between the power unit serial communications port and the serial port on a host computer or device.
Installation 55