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Instructions, M-6522, Software Rev. T.
Rev. 12/19/2023
IMPORTANT SAFETY INSTRUCTIONS
WARNING
SHOCK
There is a danger of electric shock.
Ensure you have sufficient electrical supply for supporting the requirements of the controller.
The M-522 Enclosure must be grounded. See appropriate wiring diagrams included herein.
ALWAYS remove and lock out/tag out electrical power before performing maintenance.
GENERAL DESCRIPTION
The function of the M-522 Sound and Light Control is to provide convenient operation of sound
signaling devices including navigation horns (ship's whistles), and Morse Light from a single
control panel. "At-Will" signaling of any sounding device or light connected can be
accomplished from this panel. Automated signals for Restricted Visibility and Maneuvering
Signaling, as required by IMO (COLREGS) are programmed for output from this unit. In
addition, the M-522 generates the SOLAS General Emergency Alarm Signal and Abandon Ship
signals, to be activated by external push buttons if installed. External General Alarm Systems
that generate the GEA signal can be alternatively connected to the M-522, passing the signal
through to all sound devices and lights connected to the M-522. The M-522 Sound and Light
Control is also designed to be operated in conjunction with external Sound Surveillance Systems
and/or Public Address systems.
Multiple M-522 units can be utilized on the vessel and will communicate with each other in
cases where multiple control stations are required. The M-522 operates on both A.C. and D.C.
electrical current and thereby will operate on the main voltage of the vessel, and on the backup
24 Volt D.C. emergency voltage in case of main power failure.
The M-522 is a compact solid state electronic control enclosed in an IP65 gasketed enclosure
that allows for bulkhead or console mounting. It includes four watertight cable glands for 10-14
mm cable entry. All electrical connections are made internal to the enclosure. The unit is
operated from a flush mounted, dimmable, illuminated membrane switch keypad with
embossed keys.
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