6
Optional Installation
2
EPO Port Connection
This optional feature is only for those
applications which require connection to
afacility’sEmergencyPowerOff(EPO)
circuit. When the UPS is connected to
this circuit, it enables emergency
shutdown of the UPS’s inverter.
Using the cable provided, connect the
EPOportofyourUPS(see
2a
) to a user-
supplied normally closed or normally
open switch according to the circuit
diagram (see
2b
).TheEPOportisnota
phonelinesurgesuppressor;donot
connect a phone line to this port.
3
External Battery
Connection
TheSMART2500XLHGisequippedwith
anexternalbatterycapabilityfor
applicationsneedingextendedruntime.
The back of the unit includes the
externalbatterypackconnectorand
charger rate switch. To access the
connector, its factory-installed cover
must be removed.
The charger rate switch is set to the
internalbatterysetting(INT.BATT)by
default.Whenusinganexternalbattery
pack, the switch needs to be set to
externalbatterysetting(EXT.BATT).The
connection of a battery pack and setting
the switch can be done while the unit is
operational.
Note: Leaving the charger rate switch on INT.
BATT while connected to an external battery
will not damage the unit. However, it will
extend the time needed to recharge the
batteries after a power event.
2a
2b
3
External
Battery
Connector
Cover
Charger
Rate
Switch
12-10-307-93-3181.indb 6 11/2/2012 9:27:46 AM
