HP R1500 HP 3 Phase UPS User Guide - Page 76
Control terminals, Relay output contacts
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Pin number Signal name Function 4 - No connection 5 GND Signal common (tied to chassis) 6 - No connection 7 - No connection 8 - No connection 9 - No connection Direction from the UPS - - - - - - 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. Communication 76