Communication 75
o
Standalone UPS configuration—See "Powering up the standalone UPS (on page 25)."
o Parallel UPS configuration—See "Powering up the parallel system (on page 39)."
Communication options
The UPS has serial communication capabilities through the DB-9 communication port or through an X-Slot
card in one of the available bays.
The UPS supports two serial communication devices.
NOTE: Relay, signal inputs, and the serial port baud rates are configurable through the front
panel menus.
X-Slot 1 (independent) X-Slot 2 (multiplexed) DB-9 communication port (multiplexed)
HP UPS Management Module
HP Parallel UPS Card Available
HP UPS Management Module
Not in use Available
DB-9 communication port
To establish communication between the UPS and a computer, connect the computer to the UPS
communication port using the supplied communication cable.
For the communication port location, see "Installing communication options and control terminals (on page
74)."
Serial communications port pin assignment
Pin number Signal name Function Direction from the UPS
1
— No connection —
2
TxD Transmit to external device Out
3
RxD Receive from external device In
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