35
7
RING
Output
Ring
8
LNFAIL1
Output
Line fail
9
VCC
--
Power supply
RS-232 communication port
5.2 Emergency Power Off (EPO)
The EPO function of the UPS is used to shutdown the equipment remotely. This
feature can be used for shutting down the load during an emergency.
Warning:
This circuit must be separated from hazardous voltage circuits by
reinforced insulation.
Caution:
The EPO must not be connected to any mains supply source. Cabling for
the EPO circuit should be isolated from sources of interference i.e.
mains supply. The EPO Switch must have a minimum rating of 24VDC
and 20mA and be a dedicated latching-type switch not tied into any
other circuit. The EPO signal must remain active for at least 20ms for
proper operation.
EPO Connections
Wire Function Terminal Wire Size Rating Suggested Wire Size
EPO 4-0.32mm
2
(12-22AWG) 0.82mm
2
(18AWG)
Note: Leave the EPO connector installed in the EPO port on the UPS even if the
EPO function is not required.