The MD34/8/15-90V-400 interface converts NMEA 0183 protocol to 400 Hz Synchro format (ref. voltage 115 V ac; single voltage of 90 V  L-L)

SKU: F034010 Categories: ,


The MD34/8 115-90V-400 is a solid state NMEA to synchro interface designed to convert ships heading information from NMEA 0183 protocol to 400 Hz Synchro format with a reference voltage of 115 V ac and a single voltage of 90 V line to line (L-L).

The interface accepts a NMEA 0183 (IEC61162-1) $xxHDT Heading sentence and provides a 16 VA (nominal) output of 115 V ref, 90 V phase 400 Hz Synchro signal.

The MD34/8/15-90V-400 has a fan-less design; the outside of the case is air-cooled by convection. In this way the unit is maintenance free and able to provide environmental sealing to IP65. The unit is flexible in application, easy to install and simple to maintain.


  • Produces a wide range of Output Synchro Ratios: 1:1, 2:1, 36:1, 45:1, 90:1, 180:1 and 360:1
  • Variable Input Baud Rate: 4800, 9600 or 38400
  • Easy installation and set-up
  • Built-in Status Display


  • Convert ships heading information from digital NMEA 0183 protocol to analogue 400 Hz synchro format


  • Transmitting Magnetic Compass System (TMC)
  • Electro-Magnetic Compass System (EMC)


  • Weight: 5.0 kg
  • Dimensions: H 256 mm; W 284 mm; D 186 mm
  • Mounting: Bulkhead mounted
  • Connections: 3 x M20 Cable glands to internal screw terminals; M4 Earth stud
  • Construction: Steel enclosure
  • Finish: Jet Black RAL9005 fine texture powder coat paint


  • Power Supply: 115 V ac 400 Hz (from ship’s supply); Nominal power requirement = Output load + 10 watts
  • Data input: RS422 NMEA 0183 (IEC61162-1) HDT Sentence; 4800, 9600 or 38400 Baud
  • Data Output: Synchro Data Output 115 V ref 90 V phase, 400 Hz, 16 VA nominal total load, 35 VA overload rating, continuous
  • Data sentence: $xxHDT Heading sentence


  • Accuracy: ±0.25° (at 25°C); ±0.5° (full load and full operating temperature range)
  • MTBF: >30,000 hours


  • IP rating: IP65
  • Operating temp: -10°C to +55°C
  • RoHS: Compliant
  • Compass: Safe Distance 200 cm


  • Conforms with: IEC 61162-1

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