Inverter Cut-off Enable/Disable
Enabled: the user configured inverter cut-off threshold is used. Disabled: the default FXM inverter cut-off
threshold is used.
Inverter Cut-off Threshold
Defines the point where the unit will switch from Inverter to Standby when the battery is considered to be low or in
order to preserve the battery.
The inverter cut-off threshold is configurable in 0.1Vdc increments according to the battery voltage as de- scribed
in the following table.
24Vdc Battery
48Vdc Battery
Parameter
Default Minimum Maximum Default Minimum Maximum
Inverter Cut-off (Vdc)
21.5
21.5
23
42
42
46
Battery Low Warning Threshold (Vdc)
Vset + 1
Vset + 2
UPS Maintenance > Relay & Load Shed
The Alpha FXM has up to 6 dry contacts (C1 to C6) on the front panel, which can be configured to open or close
for any of the following trigger conditions:
On Battery
Timer 3
Low Battery
48 Vdc (Only available with contact
C6)
Timer 1
Generator
Alarm
Temperature
Fault
Low Battery, Shutdown
Disabled
Low Battery and Line
Timer 2
LVD
Figure 25 shows the defaults for Relays C1 to C5. For Relay C6, the default factory configuration is +48 Vdc
output, but it can be factory configured as a dry contact.
See Table S on page 80 for factory defaults.
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