HALS-EMG-48-2L-LED
Larson Electronics, LLC
Phone: (800) 369-6671
Fax: (903) 498-3364
www.larsonelectronics.com
2
of
2
EMERGENCY BACKUP BALLAST OPERATION
During normal operation, AC power is supplied to the ballast through the backup micro inverter and the inverter charges
the battery. Connecting the inverter wires (red and white) enables the emergency circuit and supplies power to the
control/monitor circuit. The backup micro inverter detects AC input voltage (120-277V AC) and automatically set the
output voltage during emergency operation.
When AC power fails, the backup micro inverter automatically switches to emergency mode, keeping the load illuminated
for a minimum of 90 minutes. When AC power is restored, the backup micro inverter returns to charge mode to recharge
the battery. The backup micro inverter consists of a low- battery voltage disconnect which is reset when AC power is
restored. The unit can also detect an abnormal load condition (open or shorted load) during emergency mode operation
and will protect the inverter from damage.
