MD81/24 DATASHEET
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PROJECT SPECIFIC PRODUCT RANGE POWER & DATA DISTRIBUTION / POWER SUPPLIES MD81/24 POWER SUPPLY UNIT SKU: F081001 View Online › OVERVIEW FEATURES The MD81/24 is a power supply unit which operates from a ship’s 24 V DC Power from Vessel’s Main AC Supply 110 V / 220 V ac 50 / 60 Hz single phase supply and provides a 24 V Type 35 V, 50 V or 70 V dc outputs for legacy equipment (option). Automatically Switches to 24 V dc Backup Supply if Main AC Supply Fails The MD81/24 has an automatic changeover facility to switch to the Alarm Indication if Main AC Supply Fails supply failure. The MD81/24 also incorporates a power failure alarm Remote Trigger for an External Alarm Rugged, Marinised Aluminium Enclosure High surge current capability All inputs and outputs are fuse protected The main and backup (standby) power supply inputs can be isolated dc output. The MD81/24 can also be factory configured to provide ‘S’ ship’s backup (standby) 24 V dc supply in the event of a main power circuit which meets IMO recommendations. Power failure is indicated visually on the front of the enclosure and a relay contact is provided to activate an external alarm system if required. Constructed in a robust die-cast aluminium enclosure and finished in RAL9005 Jet Black fine texture paint, the MD81/24 is designed to complement existing marine navigation equipment. The MD81/24 is supplied with fixing centres for bulkhead mounting. The MD81/24 Power Supply from Marine Data: flexible in application, easy to install and simple to maintain. Suitable for supplying 24 V dc to ships navigation equipment where security of supply requires the automatic changeover to a backup dc supply in the event of a main ac power failure RELATED PRODUCTS MD04UPS - Uninterruptible Power Supply MD94DDU - Data Distribution Unit This product is an example of a baseline specification which we are not currently stocking as a standard product. Please contact us with your project-specific requirements, and we can discuss opportunities to provide a bespoke solution. All Marine Data Navigation Equipment requiring a safeguarded 24 V dc

Bulkhead mounted 4x M20 cable glands; M4 earth stud; 2x internal barrier strips Die cast aluminium enclosure RAL9005 Jet Black, fine texture Operating temp: ELECTRICAL APPROVALS Toroidal transformer Power Input: 24 V dc Backup (Standby) supply; 220 V or 110 V ac; 50 / 60 Hz main power Power Output: External Alarm: Volt Free Contacts Complies with: IMO Recommendations ADDITIONAL The trigger circuit for the external alarm sounder is closed loop (volt free) rated at 3 A; 24 V dc Normally open (NO) and normally closed (NC) configurations are supported Copyright © 2019 Marine Data Systems Ltd....