Key Features; Functional Description; Monitoring Functions - IC Audio EPM 6-30-EN54 Installer Manual

6. Key features:

Not integrated Power Supply Equipment according to EN 54-4/A2
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Mains power unit providing 24V DC with Imax. b = 8A
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6 fuse protected DC outputs, maximum 30 A each at battery power
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3 Auxiliary outputs for consumers e.g. fire detectors
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Battery charger and power manager with total discharge protection
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Soft start characteristic
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Smart battery condition monitoring
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Thermal regulated end-of-charge voltage
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Battery hot swapable
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Zero interuption when switching from one to the other energy source
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7. Functional description

The DC UPS uses the on-line structure to provide constant power without interruption. The
6 channel outputs use 6 independent fuses for protection. Any short circuit of one channel, the fuse
cut the current in short time to protect the other channels from power interruption.
The smart charger provides 27.2Vdc charging voltage when thermal sensor is not used. The
charging voltage provides temperature compensation when thermal sensor is connected. The
thermal-compensated charging voltage can maximize the battery life time especially for
lead/calcium batteries.
In the normal mode, the charger will charge the battery and supply constant power to the output.
The charging current will reduce when load current increases. Sometimes if the peak load current
is over the level that charger can supply, the battery will supply the load current at the same time.
When battery is fully charged, the charging voltage will become temperature compensated. In case
of mains power failure, the charger will stop providing current, and the battery will take over to
maintain the output voltage. In addition, the EPM 6-30-EN54 provides auxiliary outputs.
Battery failure: The outputs 1,2,3 are supplied by the internal power supply with power.
The Outputs 4,5,6 are separated after 30 minutes from the internal power supply.
Main power failure: The outputs 1 ~ 6 are powered by the battery.

8. Monitoring functions

The AC IN / Charger OK – LED (green1) lights up when AC input is good and charger can provide
current to the battery. In case of blackout or charger failure, this LED goes out and the error will be
reported via the dry contact signal pin1~3, pin1, pin2 become open circuit from short. A beeper will
sound with a double beep per minute.
The Controller OK – LED (green2) lights up when the controller is operating without fault. If the
controller is not operating properly, this LED goes out and the error will be reported via the dry
contact signal pin4~6, pin4, pin5 become open circuit.
EPM 6-30-EN54
EN
6
ic audio