Hello,

I have a question about these 4 wires. Are they RS422 or RS232? I understand that NMEA0183 should be RS422, but it appears that sometimes it is not so.

I'm trying to interface these 4 wires to a serial port via a RS422 to Serial converter and its not working.

Thanks for your help!

Views: 445

Reply to This

Replies to This Discussion

Gary,

Raymarine NMEA 0183 ports are designed to the NMEA 0183 standard, which is essentially RS422.  The AIS500 is manufactured with a DE-9 serial plug to support interfacing the AIS500 with a PC for use with the ProAIS application or other PC application.  In doing so, the BAUD rate will be 38400.  One should not simultaneously interface the 38400 BAUD leads of the AIS500 to a product (ex. MFD) and use the aforementioned DE-9 serial interface, as the AIS500's 38400 BAUD leads are additionally connected to the leads of the DE-9 serial interface.

If using the AIS500's DE-9 serial plug to interface the AIS500 to your serial to USB adapter, then please note that the most cause for communications failures between a PC application and a NMEA 0183 device are

  • incorrect installation of the serial to USB adapter
  • inferior serial to USB adapter design
  • incorrect configuration of the PC application 

Raymarine and many other marine electronics and navigational software application manufacturers recommend or re-brand the SeaLevel Model 2105R and similar SeaLevel serial communications products for customers seeking a serial to USB adapter for use with their NMEA 0183 devices.  Communications between the AIS500 and PC may be tested using the ProAIS applications.  It should also be noted that a serial COM port cannot typically be shared be more than one application unless application software is installed on to PC to support COM port sharing (ex. GpsGate, etc.).

Thanks for that reply. I'm using a FTDIChip RS422 to USB serial converter...here is a description of the wires from the FTDIChip..

Colour Name Type Description
Black GND GND Device ground supply pin.
Brown CTS+ InputClear to Send Control + (B), Input
Red TXD- OutputData – (A) Output
Orange TXD+ OutputData + (B) Output
Yellow RXD+ InputData + (B) Input
Green RTS+ OutputRequest To Send Control + (B), Output
Blue RTS- OutputRequest To Send Control – (A), Output
White RXD- InputData – (A) Input
Grey CTS- InputClear to Send Control input – (A), Input

Which of these wires would I connect to?

Thanks for your help

Gary,

I would recommend purchasing the serial to USB adapter recommended within my prior response and interfacing the adapter's DE-9 plug to the recommended adapter's socket.  Should you not elect to do so, then you may want to try interfacing the AIS500 to the serial to USB adapter as follows.

  • AIS500 38400 OUT+ to Adapter RXD+
  • AIS500 38400 OUT- to Adapter RXD-
  • AIS500 38400 IN+ to Adapter TXD+
  • AIS500 38400 IN- to Adapter TXD-

As Raymarine AIS receivers and transceivers feature a built in 38400 BAUD to 4800 BAUD multiplexer,

  • data received from an interfaced 4800 BAUD talker will be multiplexed with AIS data and the combined data stream will be transmitted by the AIS receiver/transceiver's 38400 BAUD output port (and corresponding pins of the DE-9 interface)
  • 38400 BAUD data received from a 38400 BAUD talker by the AIS receiver/transceiver's 38400 BAUD input port (and corresponding pins of the DE-9 interface) will be transmitted by the AIS receiver/transceiver's 4800 BAUD output port

As such, should the 4800 BAUD NMEA 0183 output from the E85001 PC/SeaTalk/NMEA 0183 Interface Module (which is interfaced to the SeaTalk bus featuring your ST60 Instruments) be interfaced to the AIS500's 4800 BAUD NMEA 0183 input leads, then the interfaced PC will receive a 38400 BAUD data stream including both AIS and instrument data.  Likewise, should your autopilot's 4800 BAUD NMEA 0183 v2.1 input port be interfaced to the AIS500's 4800 BAUD NMEA 0183 output leads, then 38400 BAUD NMEA 0183 sentences transmitted by the interfaced PC would be re-transmitted by the AIS500 to the autopilot at 4800 BAUD.

Thank you for the detailed very informative response! This is why I buy Raymarine products.

Thanks again

Best regards,

Gary

You're welcome.

Reply to Discussion

RSS

Events

Videos

  • Add Videos
  • View All

Photos

Loading…
  • Add Photos
  • View All

Latest Activity

Sandy Trevor replied to Sandy Trevor's discussion NMEA Heading Sensor
"Update: I just installed a Clipper NMEA Compass Sensor and connected it to my C120 ... and it works perfectly: orients the chart, AND re-enables radar overlay. Note that the Clipper device has only 3 wires: Power (+12), Ground/common, and NMEA…"
17 hours ago
Dan Y updated their profile
Wednesday
RB Fish updated their profile
May 19
terry kremer updated their profile
May 18
Lennart Pettersson updated their profile
May 17
Joe Albergo updated their profile
May 8
Robert Thompson replied to Philippe Jean Figueroa's discussion System builder and Visio icons
"Was this problem ever solved?  It is over a year since the last post and the visio file still is not available on box."
May 3
dan distasi updated their profile
Apr 30
Chas McKeown updated their profile
Apr 30
Huw Plummer replied to Huw Plummer's discussion Dragonfly Update Qs
"Hi, I have a follow up on my Dragonfly 6.  One of the pins in the plug on the back has broken off, see out of focus pic attached. Is this something that can be repaired? Thanks Huw Plummer"
Apr 29
OLIVIER CHOQUETTE replied to OLIVIER CHOQUETTE's discussion ST 60 winds indication not working
"Hi I'm back with a different issue now, my wind speed read the boat speed and the wind direction is always pointing downwind. I made the voltage reading and I found as follow Shield to red:8.02 Blue to shield :1.187 Green to sheil: 1.179 Yellow…"
Apr 21
Jack Eaton replied to Chad Lemmen's discussion C-120 Classic integration with EV-200 Sport Autopilot
"I purchased an ev-200, new RADAR and e127 MFD for a 44' Tollycraft powerboat and have been very happy cruising the east coast from Maine to the Bahamas for three years. Recently I have noticed a large and persistent difference between the…"
Apr 17
Ed Laning updated their profile
Apr 15
Robert Novak replied to Mike Allen's discussion E125 Chartplotter issue
"The precision alignment feature worked for me.  I had lost access to the part of the screen that had the find ship icon."
Apr 12
Christopher Bennett liked Barry Stedman's discussion Speed Transducer
Apr 10
Doug Du Toit replied to lilian's discussion replace ST60 wind with i60
"I had my ST 60 Wind screen climb from the 19 kt wind to 28 kt, then die on me. Showing only wind direction at the top of the screen, and "---". I tried to reset the display, but nothing registered. I checked the connections at the base of…"
Apr 10

© 2017   Created by Moderator - Raymarine, US.   Powered by

Badges  |  Report an Issue  |  Terms of Service