APC Smart-UPS VT Installation Manual download pdf (Page 47)

Electrical Installation – Communication Wiring to EPO and Optional

990-2283 Smart-UPS® VT 10-40kVA 400V Site Preparation and Installation Manual 39

Pin connections J108 (for EPO wiring options)

Connect the EPO cable, using one of the following 4 wiring configurations.

J108

EPO circuit

J108

1: Dry Contracts

Normally Open

2: +24V Normally Open

3: Dry Contacts

Normally Closed

4: +24V Normally

Closed

EPO circuit

EPO is activated when a

connection from pin 3 to pin 5

is opened.

EPO is activated when pin 1 is

connected to pins 3, and 5.

EPO is activated when an

isolated SELV 24V

voltage

is supplied on pin 1 with

reference to pin 2.

EPO is activated when a SELV

24V

voltage is removed

from pin 3 with reference to

pin 4.

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 59 60

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APC Smart-UPS VT Installation Manual Page 47