MD77RDI DATASHEET

MD77RDI DATASHEET

MD77RDI DATASHEET

Product catalog summary
Overview: The MD77RDI is a NMEA-based Rudder Angle Indicator designed for marine use, featuring a robust aluminium enclosure and a touch panel dimmer for illumination control. It offers a clear 118 mm analogue display with 1-degree increments from 45 degrees PORT to 45 degrees STARBOARD, suitable for compact spaces and can be mounted on a bulkhead or panel.
Applications: The device is intended for external use on seagoing vessels, displaying RSA Rudder Sensor Angle Data compatible with the NMEA 0183 protocol. It supports dual rudder position display with two units.
Accessories: Includes a panel mounting kit, bulkhead bracket mounting kit, and remote dimmer control. Related products include the MD61 Rudder Angle Transmitter and MD94DDU Data Distribution Unit.
Features: The MD77RDI features a clear dial display, automatic data loss indication, and supports both local and remote dimming control. It is Wheelmark approved when part of a Marine Data Rudder Angle Indication System.
Operational Specifications: The device offers ±0.5° accuracy, a 40°sec-1 follow-up rate, and backlit white illumination. It indicates data loss by positioning the pointer upright and illuminating a red fault LED.
Environmental Specifications: It operates within -15°C to +55°C and stores between -25°C to +70°C. It is RoHS compliant and has specific compass safe distances.
Physical Specifications: Weighing 1.25 kg, the device dimensions are H 166 mm, W 200 mm, D 87 mm, with a fascia of 144 x 144 x 6 mm. It requires a 140 mm square panel cut-out and is constructed from aluminium alloy with a Jet Black finish.
Electrical Specifications: The power supply ranges from 24 V to 28 V dc, consuming 10 W. It supports RS422 NMEA 0183 data protocol with various baud rates and includes a 2.5 m multi-core data cable.
Approvals: The MD77RDI conforms to several standards including BS EN 60945:2002, BS EN 61162-1:2016, and ISO 20673:2007. It has DNV GL Wheelmark type approval when installed as part of the Marine Data Rudder Angle Indicator System.
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Catalog excerpts

MD77RDI DATASHEET-1

RUDDER INSTRUMENTATION / RUDDER ANGLE INDICATORS MD77RDI DIAL RUDDER ANGLE INDICATOR SKU: F077202 View Online › OVERVIEW The MD77RDI is a NMEA-based Rudder Angle Indicator, housed in a robust, compact aluminium enclosure. Fitted with touch panel dimmer Clear and Easily Read Dial Display Automatic indication of lost valid rudder sensor angle data Automatic detection of previously lost heading data with no reset required Panel or Bulkhead Mounted Accepts NMEA data from a Rudder Angle Transmitter Local and Remote Dimming Control Supports digital RS422 NMEA 0183 Wheelmark Approved when installed as part of a Marine Data Rudder Angle Indication System control for background and pointer illumination. The MD77RDI provides a clear and easy to read 118 mm diameter analogue display graduated in 1 degree increments from 45 degrees PORT to 45 degrees STARBOARD. Compact and rugged, the MD77RDI offers a solution for locations where the available space is limited and may be either bulkhead or panel mounted. Finished in Jet Black (RAL9005) Fine-texture Powder Coat to complement other marine navigation equipment. The MD77RDI from Marine Data: flexible in application, easy to install and simple to maintain. External use on a seagoing vessel Used to display RSA Rudder Sensor Angle Data transmitted from marine equipment compatible with the NMEA 0183 data protocol Two units may be used to display dual rudder positions Panel Mounting Kit (Supplied) Bulkhead Bracket Mounting Kit Remote Dimmer Control (0-24 V dc) RELATED PRODUCTS • MD61 - Rudder Angle Transmitter MD94DDU - Data Distribution Unit The complete range of Rudder Angle Indicators from Marine Data

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MD77RDI DATASHEET-2

H 166 mm; W 200 mm; D 87 mm (on bracket) Fascia 144 x 144 x 6 mm deep; dial Ø 118 mm 140 mm square panel cut out required Panel or optional Bulkhead mounted 1 x data cable to 15-pin D-sub plug Aluminium alloy enclosure Jet Black (RAL9005) Fine-texture Powder Coat ±0.5° accuracy; 40°sec-1 follow-up rate Dial Illumination: Backlit white illumination Remote Dimmer Control Rudder Angle; range 0-40°; scale graduated in 1° increments; full scale deflection 45º Loss of Valid Data: Pointer assumes the vertical upright position, and the Red Fault LED will be illuminated ENVIRONMENTAL IEC 60945 Equipment...

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