Hp Parallel Uninterruptible Power System Manuel d'utilisateur télécharger pdf (Page 76)

Communication 76

Pin number Signal name Function Direction from the UPS

— No connection —

GND Signal common (tied to chassis) —

— 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 MW 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.

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Hp Parallel Uninterruptible Power System Manuel d'utilisateur Page 76