KW960C fitted with transformer adapterNMEA 0183 to SYNCHRO or RESOLVER INTERFACE. KW960 C


IN, NMEA 0183 data
OUT, synchro

The interface outputs synchro signals with power to drive at least one small synchro motor repeater or numerous electronic interfaces.

Gyro heading 1:1 to 360:1 synchro
Wind direction synchro
Pitch and roll synchros
Log Speed synchro
Wind speed rotation synchro 

It is designed for the lower voltage synchros such as Anshutz, 50 v ref 24 v line to line. For higher voltages (115/90) external transformers may be fitted. (Shown under the main board in the picture.) The phase output power is greater than 5VA.

Applications include reproducing synchro in specialist systems, and on retrofitting a modern gyro which does not have a synchro transmission. It can even be used to generate wind instrument and rudder angle synchro signals.

The synchro output turns smoothly from one heading to another without jerks or jumps, and the turn rate is controlled by a rotary switch on the PCB.

360:1, 180:1 90:1, 36:1, 30:1, 9:1 or 1:1 ratio signals.
 Synchro or optionally "sine-cos" or resolver output. 

KW960C with transformer adapterCOARSE & FINE transmissions are popular on naval craft for driving turret servo systems. Two of the interfaces would be used supplying, for example, 1:1 and 36:1.

SOME GYRO SYSTEMS SUCH AS GYLOT have a coarse/fine arrangement in the steering stand. This interface will allow a modern gyro to be installed whilst retaining the existing Gylot autopilot and steering stand.

115/90v SYNCHROS: Step-up transformers may be fitted for 115/90v synchros. In practice the interface has enough power to drive them directly at reduced voltage without transformers, and our tests show that 115v/90v Microtechnica synchros follow perfectly.

Tests also show that 500 Hz Vega or Kurs gyro repeaters follow perfectly at low voltage 50 Hz.

FREQUENCY: As standard the interface outputs 50/60 Hz synchro. If operated from 400/500 Hz it will output 400/500 Hz synchro. It may also operate from 50/60 Hz, but produce 400/500 Hz phases, if supplied with low voltage 400/500 Hz reference source.

WIND SYNCHRO. An option jumper allows the interface to accept wind angle from NMEA input, and simulate a wind vane transmission.

200 KNOTS/REV SPEED is also available. 

NMEA 0183. All relevant sentences.
From the interfaces's mains transformer at frequency of the input.
Normally 50v or 25 volt nominal output. 2 voltages jumper selectable. (50 - 500 Hz)
The reference supply is centre-tapped to ground.
OUTPUT Synchro S1, S2, S3
Voltage level adjustable by potentiometer. Nominal 12 to 30 volts.
Virtual ground at centre of three synchro poles.
Synchro precision approx 9 bits. 360:1 accuracy better than 0.1 degree.
Switch controlled follow up rate.
EPROM selectable option for resolver or sin-cos output, relative to ground.
Option: use an external low voltage reference as typically supplied by an autopilot, about 2 volts RMS. This gives PHASE OUTPUT at frequency of the external source. 
Square wave excitation will give a near square wave phase output.
115/240 v AC at 50/60 Hz.
400/500 Hz using 400 Hz external source.
Grey  electrical enclosure with door 350 x 250 x 150 mm

Right click for darta sheet DATA SHEET

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