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.
1
2
3
4
5
6
J108
EPO circuit
1
2
3
4
5
6
J108
1
2
3
4
5
6
J108
1
2
3
4
5
6
J108
1: Dry Contracts
Normally Open
2: +24V Normally Open
3: Dry Contacts
Normally Closed
4: +24V Normally
Closed
EPO circuit
EPO circuit
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
DC
voltage
is supplied on pin 1 with
reference to pin 2.
EPO is activated when a SELV
24V
DC
voltage is removed
from pin 3 with reference to
pin 4.
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