53
Environmental Monitoring Probe can be attached to obtain
humidity, temperature, smoke alarm, and security information.
●
Relay Interface Card
- has isolated dry contact relay outputs for
UPS status: Utility failure, Low battery, UPS alarm/OK, or On
bypass.
See Figure 20, 21 on page
48, 49 for the location of the
communication bay.
Figure 23 Optional Connectivity Cards
NOTE:
Before installing the connectivity card, please remove the
clip from the bay. Refer to the user's manual of the appropriate
cards.
Emergency Power-off
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.
WARNING
The EPO circuit is an IEC 60950 safety extra low voltage
(SELV) circuit. This circuit must be separated from any
hazardous voltage circuits by reinforced insulation.
CAUTION
● The EPO must not be connected to any utility connected
circuits. Reinforced insulation to the utility is required. The
EPO switch must have a minimum rating of 24 Vdc and 20
mA and be a dedicated latching-type switch not tied into
another circuit. The EPO signal must remain active for at