31
effective monitoring of the real-time status of UPS and timely feedback the status
to monitor when abnormal situation occurs (such as UPS failure, mains
interruption, UPS bypass and ect.). It is installed in the intelligent slot ofthe UPS.
The relaycard includes 6 output ports and one input port.Please refer to the
following table for detail.
Terminal No.
Terminal function
Terminal No.
Terminal function
1
Common source
9
Bypass altive NO
2
UPS on NO
10
Bypass altive NC
3
AC fail NO
11
UPS fail NO
4
AC fail NC
12
UPS fail NC
5
Battery low NO
CN4-1
Remote shutdown
6
Battery low NC
CN4-2
GND
7
UPS alarm NO
8
UPS alarm NC
Emergency Power-off (EPO)
(options)
EPO is used to shut down the UPS from a distance. This feature can be used for
shutting down the load and the UPS by thermal relay, for instance in the event of
room overtemperature. When EPO is activated, the UPS shuts down the output and
all its power converters immediately. The UPS remains on to alarm the fault.