HP Parallel Uninterruptible Power System - Manual (Page 76)

Communication 76
Pin number Signal name Function Direction from the UPS
4 — No connection —
5 GND Signal common (tied to chassis) —
6 — No connection —
7 — No connection —
8 — No connection —
9 — No connection —
Control terminals
The cables should be connected to the control terminal with a mating connector. Input and output terminals
have a functional isolation from terminal to terminal. They are connected to the UPS chassis through
individual 1 M
W resistors.
If using a semiconductor switch type, pay attention to the proper polarity. A relay or other mechanical control
is preferred.
Relay output contacts
WARNING: The relay output contacts must not be connected to any utility connected circuits.
Reinforced insulation to the utility is required. The relay output contacts have a maximum rating of
30 VAC/1 A and 60 Vdc/2 A nominal values.