INTERFACES for GYRO, LOG , GPS, VDR/S-VDR & DATA

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  AMI Gyro Interfacing Solutions

 
Interface Product Description Input Output
KW903-SP Synchro Retransmission Unit – High Power   Stepper, 4 to 35 V +/ -, and NMEA 0183 gyro heading.   360:1 Synchro (Adapter required for Anchutz), can drive up to 6 repeaters 
KW903-SX Synchro Retransmission Unit – Low Power  NMEA 0183   Synchro 1:1 to 360:1 
KW903-M M-Type Retransmission Unit   Heading NMEA 0183 magnetic or gyro   M-Type transmission 3 wire. 
KW909-B BEST GPS SELECTOR  2 GPS NMEA 0183  Best GPS NMEA 0183
KW909-FM3  8 Channel Data Combiner  8 channels NMEA   One combined NMEA 
KW909G GPS to PULSE LOG Interface   NMEA from GPS (must contain SOG)   NMEA 0183, and 200ppm for radar 
KW909J Direction Reversing Interface (for normal and aft facing installations)  NMEA (perhaps Wind, Gyro, Log combined)   Direction reversed NMEA (for some stern facing bridge vessels) 
KW909PPI Parallel Port Interface Centronics type 36 way standard printer parallel port  NMEA 0183 
KW909SPI Serial Port Interface  NMEA, RS232/422 (baud rate 300 - 38400),    NMEA 0183 
     20mA current loop   
KW910M Gyro Interface  Heading ratio 1:1,  9:1,  10:1,  30:1,  36:1,  180:1,  360:1. 50-500Hz        NMEA 0183 
    Rudar sensor angle; Telegraph, pitch, rudder demand                                                                    
    Wind sensor; Log Speed                                                                          
KW920SV Current Loop Converter   NMEA 0183   4-20mA current loop, or +/- 5v,  or         0~5vdc 
KW932 32 Channel Interface 

 Contract Closure/Switch Voltage, such as Alarms,

 On-off  Switches 

  NMEA 0183 
KW935 Propulsion and Telegraph interface  VDC +/- 0.5v to +/- 30 volts, and    NMEA 0183 
     4-20 mA current signals   
KW940-B Transmitting Magnetic Compass System  Magnetic Compass Top Sensor Signal (pick off coil)   NMEA 0183 heading for AIS or others
KW941 NMEA to Stepper Retransmission Unit  Low power Stepper, NMEA and Furuno AD10 format   Stepper, 6 step per deg. 24/50v or 35/70v 
KW950E Heading Repeater & Interface                               Hearding: Stepper Heading, Synchro 360:1   NMEA 0183 HDT heading with display,
  (70 functions)  Cetrek, Yokogawa, Robertson, S G Brown    with ROT bar, NMEA 0183 VBW,  
     proprietary data, Anschutz Coursebus.    NMEA 0183 SDDPT and SDDBT 
     Speed Log: 200ppm or 400ppm,     
     GPS   
     Depth: Transmit and receive pulses    
KW912 48 Step per degree RTU   NMEA 0183 heading   4 pole step transmission 
KW960 NMEA 0183 to Synchro Interface  NMEA 0183 heading   low power synchro, or resolver 
KW991 Gyro Heading Repeater   Synchro 360:1/ stepper heading   NMEA with ROT, Off course alarm 
KW991CR Universal Course Recorder & Digital Tape Heading Repeater w/ dot matrix printer  Gyro: step, synchro, NMEA and GPS    Plain language printout: time, position, course, cog, sog, date. 
NavTalk NMEA Spliter  2 NMEA channels   10 NMEA channels (incl. 3 isolated) 

Please send your enquiry to mkt@ami-gfv.com or call us at +65 6476 6057 for data sheets!!!

Welcome to visit our website at www.ami-gfv.com for VDR/SVDR and other products and solutions.

KW909-B Best GPS Selector

KW910 SYNCHRO INTERFACE When two or more GPS are fitted, this device selects the “best” for transmission to the electronic chart system, GMDSS, VDR or radar.
 The KW909 (B) recognises the quality modes of the GPS signals.

 If the status of both GPS signals is equal, channel 1 is selected as the priority channel.

 Two output options are available, selectable by jumper: -
1. The KW909 reads in the data from each GPS, and generates its own output message. The interface outputs position, COG, SOG, date and time.
2. The KW909 passes through all the data from the selected GPS.

Input :- 2 NMEA 0183 ports. Data must contain the minimum of the $GPGGA sentence. Ideal are GGA, VTG and ZDA.
Output:- 1. NMEA 0183 $GPGGA, $GPVTG and $GPZDA. Rate is in time with the input.
2. NMEA 0183 data passed through from selected channel. 5v CMOS limited 5mA drive. NMEA 0183, RS422, RS232 compatible.
Control:-  Centre-off switch to select CH1, AUTO or CH2.
Power :- 9 to 32v DC at 200mA.
Housing:- Enclosure 222 x 146 x 55mm.
Features:- LEDs on data in and out and bicolour status led.
Power fail and program run watchdog circuit.
All connections removable terminal blocks.
 
KW909-FM Serial Data Combiner Interface

KW910 SYNCHRO INTERFACE The KW909-FM model connects up to 8 NMEA 0183 talkers and combines their data on to one output port. Applications include combining the data from several sources into SVDR, VDR, ECDIS or Radar.

Attention has to be given to possible overload of the output channel, as it can not possibly pass more than 480 characters per second at the NMEA 0183 standard rate of 4800 bits/sec. ANSWER: output at 38400.

The output rate can be switched by DIP switch to 38400 so as to pass through more data. With a 38400 baud output one input port can be switched from 4800 to 38400, which will allow serial connection of interfaces, or daisy chaining.
 

Input :- 8 NMEA 0183 or IEC 61162 ports for 4800 baud data.
Output:- NMEA 0183 data is output on a first-message-in first message-out principle. Excessive input data is discarded and an overload LED lit.
Each message is delayed by at least its length, 2.1 ms per character, and it also has to wait until the current message has finished sending.
Output baud rate 4800 or 38400.
"D" model Output  Three 5 Volt CMOS drivers. Stepper output OR Furuno clock and data signals
Power :- 10 to 32v DC at 100mA..
Housing :- Textured diecast enclosure 222 x 146 x 55mm.
Fitted with compression glands.
Features:- LED’s on data in and out and bicolour status led.
KW909-G GPS to PULSE LOG Interface 

KW910 SYNCHRO INTERFACE Normally radar expects to receive speed in the form of 200 pulses per mile. In the event of a log failure, speed over ground from the GPS can be supplemented in the form of a conventional log output.

The KW909 will connect to a GPS NMEA 0183 data line. It is programmed to receive the speed over ground (SOG) and generate pulses.
Two versions are available, giving pulses according to the speed in the direction of course over ground. By supplying GPS and heading data via
a data combiner the second version will give pulses according to speed in the direction of the bow. This second version has applications with
radar, which expects speed and heading to be related.

The accuracy of pulse output is dependant on the accuracy of the GPS input, in steps of 0.1 knot. The pulse output is for speed in the direction of course over ground not the bow. A version is available that gives pulses in the direction of the bow if both gyro heading and GPS are input.

Input :- NMEA 0183 opto isolated port for GPS input. Data input must contain speed over ground sentence VTG, RMC or GGA.
Output 1:- NMEA 0183, $GPGLL and $GPVTG.
Output rate 1 per second (other sentences to order) 5v CMOS limited 5mA drive.
NMEA 0183, RS422, RS232 compatible.
Output 2:-  Two 5v CMOS drivers 5mA drive or pull-down.
200 pulse per mile. 128mS pulse. One output positive going, other port negative going. May drive most radar directly or else fit low current 5v relay.
Features:- LEDs on data in and out and bicolour status led.
Power fail and program run watchdog circuit.
All connections removable terminal blocks.
Power :- 9-32 Volts DC at 0.2 Amps.
Housing :- Duck Egg Green diecast box 222 x 146 x 55mm.
KW909-J Direction Reversing Interface

KW910 SYNCHRO INTERFACE Modern navigation aids send their data in NMEA 0183 format, and heading is related to ship’s bow. On a ferry with a stern facing bridge, the direction has to be reversed for the instruments to make sense.

This interface is programmed to reverse the direction of GYRO, RELATIVE WIND and DUAL AXIS LOG

A KW909 FM data combiner would be required to combine the data from the three instruments mentioned above to feed into the direction reversing KW909J.

Input :- NMEA 0183 port. Opto isolated. Programmed for all NMEA heading sentences, required by specification $HEHDT, $WIMWV and $VDVBW.
NMEA 0183 out. Reversed data NMEA 0183.
$HEHDT output rate default is 1 per second and whenever heading changes.
$WIMWV, wind data in time with input.
$VDVBW, dual axis log in time with input.
5v CMOS limited 5mA drive.
NMEA 0183, RS422, RS232 compatible.
Housing:- Duck Egg Green diecast box 222 x 146 x 55mm fitted with compression glands.
Power :- 9-32 Volts DC at 0.2 Amps.
Features:- LEDs on data in and out and bicolour status led.
Power fail and program run watchdog circuit.
All connections removable terminal blocks.
KW909-PPI Parallel Port Interface

KW910 SYNCHRO INTERFACEMany ships have a data-logging printer to print engine revs, telegraph, etc.

This interface converts that data into a form that can be used by modern electronics.
· NMEA 0183 suitable for a voyage data recorder
· RS232 compatible data for a printer

The interface appears as a printer to the ship’s computer so it need not know the difference. For the NMEA 0183 or IEC 61162 output the data is filtered so that only permitted characters are transmitted. Data fields become comma-separated to ease later analysis.

Input 1:- Centronics type 36 way. This is the standard printer parallel port connection.
Input 2:- Optional NMEA 0183 from a GPS. (GGA, VTG, RMC, ZDA)
Output 1:-  NMEA 0183, 5 volt level via 47 ohms per leg at 10 mA.
$ERTXT,01,N,T, followed by the data from the parallel port input, filtered as described.
“N” increases with each sentence from 01 to 99.
“T” is a number 1 to 4, set by DIP switch 3 & 4, to permit 4 interfaces to be used in a system.
Optional output: (switch 1 set on) $GPGGA, $GPVTG and $GPZDA sentences.
Data rate: in time with the GPS GGA input, which is expected to be 1 per second.
Output 2:-  RS232 compatible 5 volt level. Repeats the parallel port data at 4800 baud.
This output is to be used by a new printer, and contains any original control codes.
Power :- 18 to 36 volts DC at less than 0.2 amps. Intended for 24 volt professional systems.
Power is isolated from the interface so that the output data may be grounded safely.
Enclosure:- 222 x 155 x 55 mm diecast aluminium box painted duck-egg blue.
KW909-SPI Serial Port Interface

KW910 SYNCHRO INTERFACESome ships are fitted with alarm or instrumentation systems which output their status as proprietary serial data. This is not suitable for sending to a VDR. Examples...
· Autronica fire alarm.
· Pizzorno engine telegraph
· Radar data in proprietary format
· Engine room or hull stress monitor system
· Meteorological instrumentation

The KW909-SPI converts the data into the standard required · NMEA 0183 or IEC 61162
The principle of this interface is simplicity, with any complexity waiting for the time of replay. It makes no attempt to translate or interpret the contents of the proprietary data being input.

Example of use: A ship has a system periodically sending a line of data to a printer, giving RPM, pitch, and rudder angle in a printable form with the data separated by spaces. The KW909-SPI converts the data string to an NMEA 0183 proprietary $PAMI sentence and sends it to the VDR. (It does not convert it to $ERRPM or $IIRSA or similar sentences although that could be possible to special order.)

The data can be replayed from a VDR memory, passed through the interface, and output in the original proprietary format. The meaning of the data might be displayed using a PC program available from the instrumentation manufacturer. Alternatively it can be translated by eye and hand using the original manufacture’s documentation. For the previous example the replayed data could be fed via the interface directly to a printer so it would be seen just as it would have been on the ship.

Input Port 1:- NMEA 0183 data from other interfaces.
This provides the KW909-SPI with a daisy-chain ability
Output Port 1:- NMEA 0183, 5 volt level via 47 ohms per line at 10 mA
Data from port 2, converted (or encoded) to NMEA 0183 compatible data
Data format $PAMI3,ccc,CR LF where
“3” is ID 1 to 4. Further ID available by changing location in EPROM
“ccc” is the incoming message translated to NMEA 0183 compliant form
(except that an extended length of up to 132 characters is allowed)
Data output: repeat of the input data of port 1, this gives the daisy-chain function
Input Port 2:- Opto isolated input port. NMEA 0183 or RS422 or RS232 or 20 mA current loop.
Baud rate switch selectable from 300 to 38400
Data is standard 8 or 7 bit serial data format using all codes 00 to FF hex.
Output Port 2:-  10 sec rate transmission of “CR” for request of data when required.
This ports output may be required to request information from systems.
Power :- 18 to 36 volts DC at less than 0.1 amps. Intended for 24 volt systems. Power is isolated in the interface.
Enclosure:- 222 x 155 x 55 mm diecast aluminium box powder coated black..
Data Conversion:- Future options can be provided for the direct translation of proprietary data.
Example; met data to NMEA 0183 WIMWV. Sperry Rascar tracked targets to RATTM
KW910-M Synchro Interface

KW910 SYNCHRO INTERFACE The interface converts synchro transmission to NMEA 0183 or IEC 61162 data. Applications include

• Gyro compass for radar, ECDIS and heading displays.
• Rudder Sensor Angle used with a VDR.
• Telegraph, pitch, rudder demand; The “XDR” sentence can be used for many synchro systems.
• Wind speed and direction
• Log speed

The interface is a precision device, and does not require alignment in the 1:1 mode. The interface can convert gyro ratios such as 90:1. A DIP switch selects reference voltages over the range of 40 to 220 and signals from 40 to 90. The function & choice of data output is set by a 2nd DIP switch.

Input 1:- Synchro 40 to 550 Hz. Reference 40 to 220v. Phases 40 to 90 volts.
Loading resistors 91K to 270K ohm per phase. 22K reference.
The phases have a common connection at centre of the three phase scaling resistors to the power input 0v. Reference input is isolated by transformer.
We can supply KW910’s for voltages outside the range mentioned and for extreme precision.
Conversion 12 bits, 0.1 degrees.+/- 0.5 degrees. Conversion rate 40 per second.
Inpurt 2:- NMEA 0183 port. 4800 baud.
Gyro option: Programmed for all NMEA heading sentences input.
Rudder Sensor Angle option: Input a 2nd rudder angle (or rudder demand)
Wind option: Use a 2nd interface to input speed or direction.
XDR option: A second transducer value can be input.
Output:-  5v CMOS 5 mA via 47 ohms. NMEA 0183, RS422, RS232 compatible.
Data is 4800 baud NMEA 0183 format, plus an Anschutz Coursebus option.
Generally 1 per second. Refer to option list.

Gyro options: $HEHDT, $HEROT, $HCHCC, $HCHDM.
Rudder sensor angle: $ERRSA
Wind option: $WIMWV. The interface outputs wind speed OR direction.
XDR option: $ERXDR
 
Cable Entry:- Glands for 7 mm diameter cables.
Power :- 9-32 Volts DC at 0.2 Amps.
Housing:- Duck Egg blue diecast box 222 x 155 x 55 mm for indoor bulkhead mounting.
Features:- LEDs on data in and out and bicolour status led.
Connections are lift-off terminal blocks.
KW920-SV Digital To Current Loop Convertor

A small grey converter The interface converts NMEA 0183 data from navigation instruments or sensors such as echo sounder & log into a 4 to 20 mA current loop. This is a recognised industrial standard commonly used to drive analogue indicators, data loggers, chart recorders and engine control systems. Voltages +/-10 volts dc and other variants are also used.

The interface can output: -

• 4-20 mA or
• +/-10 volts or
• +/-5v or 0 to+5 volts

 

Input :- NMEA 0183, RS422 or RS232 via opto isolated channel.
4-20 mA Output:- Max voltage 10 volts so 500 ohms is the highest value load.
Accuracy is typically better than 1%.
The current goes to zero if there is no input data.
Isolated from power, data and ground
Voltage Output:- +/- 10 volts for future options.
10K load minimum.
Data Output:-  NMEA 0183 for monitoring & test. Bi-colour status LED.
Power :- 9 to 28 volts DC at less than 200 mA.
Housing:- Diecast box 222 x 146 x 55 mm.
Fitted with cable glands.
Removable terminal blocks on the PCB.
   
KW932-C 32 Channel Interface

A small grey converter DESIGNED FOR interfacing a VDR to....

• Fire alarms
• Fire doors, watertight doors
• On/off status switches
• Engine controls, telegraph, status, alarms

Typically these systems have a switch, an indicator panel, and a junction box where an on/off voltage may be intercepted.

The interfaces may be installed close to the switch junction boxes. AMI believe numerous interfaces, near the sources being monitored, are preferable to the running of many long cables to a central interface in the VDR.
 

Input :- 8 groups of 4 opto isolated channels. Each group of 4 has its own common line.
Voltage input high level 2 to 240 volts DC or AC. Input loading 4 to 10 mA.
Voltage input must go to near zero (<5%) in the low state for reliable switching.
Can supply its own 24v output for use with isolated contacts such a micro-switches
Series resistors are fitted to each input at installation time to suit the voltage.
Output:- NMEA 0183 and IEC 61162
$IIXDR for 1 to 8 sentences corresponding to the 8 groups of 4 inputs or
Proprietary compact sentence example $PAMI,XDR,A,0101,0000,0000,1010,*HH cr lf 32 selectable identifiers to allow for multiple interfaces. (Interface “A” in example above)
Dip-switch selectable for the number of groups in the data output.
Sampling rate 1 second. Output rate 10 seconds & 1 second when input changes.
Features:- LEDS on all inputs and outputs.
Bypass switch to allow an interface’s data to be isolated from the chain.
Power :- Nominal 24v at 0.04 Amps. (18 to 32 volts)
Enclosure:- 275 x 175 x 65 mm aluminium enclosure. 11 glands for 7mm cable.
   
KW935 Propulsion and Telegraph interface

A small grey converterThe KW935 connects to a ship’s RPM indicator, thruster, rudder angle and telegraph. The voltages are turned into NMEA 0183 digital data.

The KW935 has four DC voltage input channels, all electrically isolated from ground and from each other. Inputs may vary from +/- 0.5v to 30 volts DC maximum and be either a single + or – polarity or both.

The input voltage is converted to an 8-bit byte by the analogue to digital converter. The translation of a variable voltage to a data output is made by the microprocessor, with look-up tables in the EPROM (example: +/- 5v = +/- 45 degrees rudder angle). Generally, for a VDR, the “raw data” values of 0 to +/- 100 can be recorded and translated to actual values on replay. The KW935 has a data combining (pass-through) facility to allow several devices to be connected.

 

Input :- 4 channels +/- 0.5v to +/- 30 volts for full scale (extendable with additional resistor).
Adjustable. 50 K ohm input impedance. Low pass filtered.
Isolated at more than 500 volts level. Sampled at 1.6 second interval.
Analogue to digital conversion of 8 bits. 256 values. 1 % accuracy typical.
4-20 mA signals can be measured by the voltage across the line, terminated in 100 to 500 ohms.
The KW935 is not intended to have low resistance and be inserted into a loop with other receivers.
Input :- 1 NMEA 0183 port.
Acts as data pass-through input channel so that data can be combined.
Output:- NMEA 0183 port. 5 volt level CMOS via 47 ohms.
Alignment:- The input potentiometer is adjusted for full scale reading with a full scale input voltage.
Features:- LEDs to indicate function. Hexadecimal switch to select data output formats.
Power :- 18 to 30 volts DC at 2 watts. Isolated from ground
Enclosure:- Diecast aluminium enclosure 222 x 155 x 55 mm.
   
NavTalk NMEA Spliter

The NAVTALK acts as a selector, taking input from one of two nav-aids (Or the gyro) and provides 10 OUTPUTS for all manner of equipment.

You may find 3 Navtalks on some ships to ease the interfacing and integration of the ship's navaids.
1. GPS data for bridge equipment.
2. GPS data from Inmarsat C to equipment in the GMDSS console
3. Gyro heading data to bridge equipment.

 

Input :- - 2 Channel input
- NMEA 0183, V1 or V2,
- RS232 or RS422 format all rates up to 4800 baud data.
Output:- - NMEA 0183 RS422 5v level differential drive PLUS
- RS232 compatible 0-5v level.
- 5 mA maximum per line, limited with 47 ohm series resistors from 5v CMOS
- Three of 10 outputs have common 0v, isolated from other signals.
Features:- - 3 of the 10 outputs electrically isolated
- Helps terminate screens correctly.
- Economical junction box for a neat installation of many cables.
- RS232 compatible output as well as NMEA 0183 and RS422.

- LEDS on pcb to indicate power, channel in use, data input & output. "Alarm" output indicating which channel selected.
Power :- 10 to 32 v DC at less than 0.1 amp.
Enclosure:- ABS splash proof housing 160 x 240 x 60 mm.
   

 

Please send your enquiry to mkt@ami-gfv.com or call us at +65 6476 6057 for data sheets. We can even work out a typical solution for you!!!

Welcome to visit our website at www.ami-gfv.com for VDR/SVDR and other products and solutions.