both the main panel and the common signal device at the remote repeater cabinet. The trouble signal is silenced
by operating the "SILENCE" switch, which will silence the panel trouble buzzer. The "TROUBLE SILENCE"
switch on the repeater cabinet will silence the common signal device at the repeater cabinet. Both these are
provided with ringback. After elimination of trouble, the trouble buzzer will sound until the "SILENCE" switch is
returned to normal.
7.14
Power Supplies
The KMSD System employs dual redundant power supplies. If the output voltage of Power Supply No. 1 falls
below 85% of nominal, or if the input or output fuse to Power Supply No. 1 fails, the panel automatically switches
to Power Supply No. 2.
Failure of Power Supply No. 1 or any of its components or fuses results in illumination of the front panel LED,
Power Supply No. 1 and a common trouble signal, which sounds the common trouble buzzer in both the detector
cabinet and common signal device at the remote repeater cabinet.
The trouble buzzer is silenced by operating the "SILENCE" switch on the control cabinet and the common signal
device may be silenced by the "trouble silence switch" at the remote repeater unit. Ringback is provided when
the trouble condition is cleared. The trouble buzzer will resound until the "TROUBLE SILENCE" switch is restored
to the normal position.
Off-normal position of the "TROUBLE SILENCE" switch is indicated by a trouble silence light, which appears
above the "TROUBLE SILENCE" switch.
Power failure alarm is operated by:
a.
Failure of ship's power. Should the AC power appearing on Power Supply No. 1 fail for any reason, including
the failure of fuse 1, the power failure alarm will sound.
Power failure alarm is indicated by illumination of the power failure lamp and energizing of the trouble buzzer,
at the detector cabinet and the common signal device at the remote repeater cabinet.
The power failure audible signal is silenced by operating the power failure alarm silence switch. Operating
this switch illuminates the power failure silence lamp. If power is restored while the "POWER FAILURE
SILENCE" switch is in the "SILENCE" position, the trouble buzzer will resound (ringback).
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