Fire-Lite Alarms MS-4412B, Инструкция по эксплуатации

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System Events 3. System Operation
MS-4412B/MS-4424B Instruction Manual PN 15125:G1 10/22/02
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Brownout Condition
The total power being provided to the system’s power supply should not exceed the current draw during
fully loaded panel operation. Brownout circuitry annunciates degradation of the incoming AC voltage
supply. A brownout condition is annunciated when the AC power decreases. When the brownout threshold
is reached, the system reacts as if AC power is totally lost:
• Battery backup begins supplying power to operate the control panel
• General Trouble Relay contact transfers
• Green AC Power LED turns off
• Yellow System Trouble LED illuminates
• The piezo will sound one second on, one second off, and repeat until the Trouble is cleared.
When the AC voltage returns or increases above the brownout threshold, the green AC Power LED will
illuminate. The power supply circuitry will return to primary power functions and begin to recharge the
backup battery supply.