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Summary of Contents for MARINE DATA MD77HR
- Page 1 …navigation with innovation USER MANUAL MD77HR F077052 - HEADING REPEATER MD77HR-MA-v04r08 2015-03-27 ENGLISH...
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Page 3: Table Of Contents
MD77HR CONTENTS MD77HR HEADING REPEATER ............5 DOCUMENT ..................6 About This Manual ..................6 NOTICE ....................7 Copyright ...................... 7 DESCRIPTION ..................8 PRINCIPLE OF OPERATION .............. 9 APPLICATION ................... 10 SPECIAL FEATURES ............... 10 MAJOR DIMENSIONS ..............11 INSTALLATION ................. - Page 4 12.2 Fault-Finding ....................21 12.2.1 MD77HR does not operate ............. 21 12.2.2 MD77HR aligns to 000° but does not follow the source heading ..21 12.2.3 Display illumination not functioning ..........21 12.2.4 Display illumination flashing or Alarm indications present ....21 12.3 Technical Support ..................
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Page 5: Md77Hr Heading Repeater
MD77HR 1 MD77HR HEADING REPEATER Bulkhead Bracket Mounted (Option) Rear View - Panel Mounted (Standard) -
Page 6: Document
About This Manual This Manual provides installation, operating Instructions and fault-finding procedures for the MARINE DATA MD77HR Heading Repeater. After installation, this manual should remain with the vessel to which it relates. This manual may also be made available in electronic Portable Document Format (PDF). -
Page 7: Notice
Vittlefields Technology Centre Forest Road NEWPORT Isle of Wight PO30 4LY UNITED KINGDOM tel: +44 (0)1983 822180 email: info@marine-data.co.uk fax +44(0)1983 822181 web: www.marine-data.co.uk MARINE DATA SYSTEMS LIMITED reserves the right to make changes to its products and specifications without notice... -
Page 8: Description
MD77HR 4 DESCRIPTION The MD77HR is a rotating dial Compass Heading Repeater. It is designed to display Ship’s heading as part of a Gyro-Compass or Transmitting Magnetic Compass System, receiving data via a NMEA 0183 digital transmission. The MD77HR has a dial of 118mm diameter marked in 1 degree increments with numeric values every 10 degrees plus cardinal and inter-cardinal markers. -
Page 9: Principle Of Operation
MD77HR 5 PRINCIPLE OF OPERATION The MD77HR accepts serial azimuth data from a Gyro-Compass or Transmitting Magnetic Compass (TMC) in digital format using standard NMEA 0183 (IEC61162-1) True or Magnetic sentences. The input is processed by electronic circuitry contained within the Repeater enclosure, powered from 18V to 32V DC derived from the ship’s supply. -
Page 10: Application
MD77HR 6 APPLICATION The MD77HR displays True or Magnetic Heading Data transmitted from NMEA 0183 (IEC 61162-1) compatible marine equipment (Gyro-Compass, TMC, EMC, GPS Compass etc.) The following NMEA 0183 sentences (in priority order) may be used to display Heading:... -
Page 11: Major Dimensions
MD77HR 8 MAJOR DIMENSIONS All dimensions mm Panel mounting and bulkhead mounting (option) shown here:... -
Page 12: Installation
Connect the MD77HR in accordance with table 9.3 - Pin Connections (by function). The MD77HR is designed to use 24V DC and accept a digital RS422 data signal using the NMEA 0183 protocol. Ensure all incoming supply and signal cables are either suitably insulated and/or connected, or bonded to the vessel’s earth where appropiate. -
Page 13: Pin Connections (By Function)
MD77HR Pin Connections (by function) Cable core Pin: Type: Function: Description: colour Positive Input +24V DC Supply (Main) Input Negative 24V DC Supply Return Optional External Dimmer Input. 0V = 0-24V Minimum Illumination; 24V = Maximum Rotary Illumination Input Analogue... -
Page 14: Pin Identification
MD77HR Pin Identification Pin Idents of the 15-pin fixed D-type socket connector (view looking on the rear panel of the MD77HR): Typical Wiring Diagram (shown with remote dimmer option) -
Page 15: Commissioning The System
Ensure that the installation complies with section 9 - Installation. Apply system power (24V DC) to the MD77HR. The MD77HR Heading Repeater will initially align to 000° degrees; it will then adopt the heading which is being transmitted from the heading source. -
Page 16: Operation
MD77HR 11 OPERATION 11.1 Operator Controls A. Function Button B. Acknowledge Button C. Repeater Status (Green) D. Alarm Status (Red) E. True Heading (Blue) F. Magnetic Heading (Yellow) G. Dimmer & Control [Increase & Save Button] H. Dimmer & Control [Decrease &... -
Page 17: Normal Operation
0.5 seconds or more. When the warning is acknowledged, the audible alarm is silenced and the alarm indicator is turned OFF. The MD77HR returns to normal operation with the heading type displayed as indicated by the True Heading or Magnetic Heading indicator. -
Page 18: Alarm: Loss Of Data
11.6 Automatic Baud Rate Detection If valid data is not received and a No Data error is active, then the MD77HR will scan all available Baud rates to look for valid data at an alternative baud rate. If valid data is discovered which corresponding to the list of acceptable data sentences, then the new Baud rate will be stored and used for future data reception. -
Page 19: Heading Type Selection
MD77HR 11.7 Heading Type Selection The type of Heading displayed (depending on the available data) can be selected as True Heading or Magnetic Heading. It can also be selected as Automatic where True Heading is displayed if available. In this case Magnetic Heading will be displayed if data is available for Magnetic but not available for True. -
Page 20: Test Function
11.8 Test Function A Test Function is provided to give confirmation of the correct operation of the MD77HR electro-mechanical arrangement and illumination. To activate the Test Function, press and hold both buttons for 3 seconds until the Test Function starts. -
Page 21: Maintenance And Fault-Finding
12.1 Maintenance No scheduled maintenance is required. It is recommended to gently wipe away any accumulated dust periodically. Note: The MD77HR is a sealed unit and has no user-serviceable parts inside. Breaking the factory seal will invalidate the warranty. 12.2 Fault-Finding 12.2.1... -
Page 22: Technical Support
MD77HR 12.3 Technical Support If further technical support is required then please contact Marine Data Technical Support: • By email: support@marine-data.co.uk • Through our website: www.marine-data.co.uk All technical support enquiries must include the following basic equipment information: About your MARINE DATA Equipment: MARINE DATA Equipment Model number (e.g. -
Page 23: Specifications
MD77HR 13 SPECIFICATIONS 13.1 Physical Weight: 1.25kg (with bulkhead mounting bracket) (Bulkhead mounted): Width 200mm; Height 166mm; Dimensions: Depth 81mm Fascia Dimensions: 144mm x 144mm x 6mm Deep Mounting: Panel-mounted or optional bulkhead mounting bracket 1x 15-way D-type connector; M4 Earth stud... -
Page 24: Environmental
Supplied with 2.5m of data cable terminated with a 15-pin D-sub type connector If spare parts are required then please contact either your supplier or MARINE DATA. MARINE DATA reserves the right to makes changes to its products and specifications without... -
Page 25: Spare Parts And Accessories
MD77HR 14 SPARE PARTS AND ACCESSORIES MD Part No. Description: Illustration: MD77TB Bulkhead Mounting F0077100 Trunnion Bracket (Option) SS20001 Data Cable Assembly, 2.5m Panel Mount Remote Dimmer SS37120 Control Assembly MD69CBW F069103 8-Way Waterproof Juction Box IP65 MD96JB8 F096020 Junction Box IP54... -
Page 26: Grounding And Shielding
MD77HR 15 GROUNDING AND SHIELDING This repeater is designed to be grounded via an M4 earth stud provided on the rear panel. This earth stud provides the electrical contact for protective earth bonding. The power/data connector has a conductive outer casing which, when mated, connects to the unit enclosure. -
Page 27: Glossary Of Terms
MD77HR 17 GLOSSARY OF TERMS Term Description Electro-Magnetically Compatibility - specifically measured against MIL-SPEC-461 Electromagnetic Compass (fluxgate coil Compass) Maritime navigation and radio communication equipment and systems. EN60945 General requirements. Methods of testing and required test results. Minimum Order Quantity... -
Page 28: About Marine Data
MARINE DATA is a brand name and trademark of Marine Data Systems Limited, a British multi-award winning company established in 1978 and based on the Isle of Wight, England. MARINE DATA, now in its 35th year, has led the world in the development and manufacture of marine navigation and control systems. - Page 29 MD77HR NOTES...
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- Page 32 MARINE DATA SYSTEMS LIMITED Vittlefields Technology Centre Forest Road NEWPORT Isle of Wight PO30 4LY UNITED KINGDOM tel: +44 (0)1983 822180 fax +44(0)1983 822181 web: www.marine-data.co.uk email: info@marine-data.co.uk...
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