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Normal Mode Operation
When AC power is applied, the driver is in normal mode where the output current is at the
programmed setpoint. The Illuminated Test Switch light is ON (not flashing) indicating the batteries
are being charged.
Emergency Mode Operation
When power fails, the emergency driver automatically switches to emergency power, operating the
emergency LED load at required illumination. When the AC power is restored, the emergency driver
returns to the Normal Mode of Operation. This emergency driver will operate an LED lighting load with
a voltage between 10.0 VDC and 55.0 VDC and up to 10W of output power. The LED driver ensures
that there is light output for a minimum of 90 minutes.
Self-Testing Operation
The OSRAM self-testing emergency driver unit contains a control/monitor circuit that automatically
performs a 30-second discharge test once a month and a full 90-minute discharge test once a year.
During automated routine testing, the self-testing emergency driver simulates an AC power failure
causing the unit to automatically switch to emergency mode. The unit monitors the operation of the LED
load, battery voltage and LED load connections. If the unit detects any failures, the indicator light will
flash as per failure condition (see Troubleshooting section) until the condition has been corrected and
the unit passes the next test. To reset a failure indication, push the three wire Illuminated Test Switch
for at least 5 seconds. If the driver detects that condition has not been corrected, the unit will detect the
failure and signal the failure condition.
Test Switch
The below illustration shows the test switch that is provided as an accessory with the Emergency
driver.
Figure 1: 3-Wire Illuminated Test Switch
