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Old 29-08-2017, 05:17   #1
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USB Rs485

Hello!!
I intended to change my connection from AIS Standard Horizon 2200 to opencpn by avoiding the RS232 switching over the RS485. Well, installed driver and operating and com port recognized on devices in windows 7 and 10 (I tried on both operating systems) and consequently configuring in opencpn the new connection to 4800 and 39400 bits (I tried both) there is no communication with the computer. I have skipped something or that connector is not for this kind of NMEA statements?
Has anyone used it?
Thank you.


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Old 29-08-2017, 05:48   #2
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Re: USB Rs485

Greetings and welcome aboard the CF, Icamisani.
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Old 31-08-2017, 23:45   #3
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Re: USB Rs485

How did you connect the 2200 to the usb converter?Made your own. Db9 connector? Correct pins?

You need hyperterminal or similar to look for com port data.
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Old 01-09-2017, 00:18   #4
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Re: USB Rs485

Huh? Standard Baud rates are 110, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200, 128000 and 256000 bits per second.

Did you mean to use 38400? That's the standard for most AIS units.
Most NMEA devices use either RS232 or RS422. Ive not seen any using RS-485, but then ive not seen everything.

Exactly what are you trying too do?
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Old 01-09-2017, 10:54   #5
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Re: USB Rs485

Hi. thanks for your answers I have a S.H. 2200 configured in opencpn and connected via RS232 and running. Someone told me that the connection via RS435 was faster and safer (?). connect USB adapter RS485 directly to ST. Horizon and computer. this opens a COM port but there is no communication between them. Is it necessary to interface with RS232? there is an RS422 / 485 to USB converter adapter that connects via RS232. will it be the necessary one?
Thank you so much.
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Old 03-09-2017, 02:45   #6
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Re: USB Rs485

Sorry but that is just wrong. The SH2200 "speaks" rs232, at either 4800 or 38400 baud, see page 146 of the manual.
So, you must use the serial USB to RS232 adapter, and you must configure the serial port to 4800 or better, 38400 baud. Set the output from the radio to the same speed - they must match.
The com port settings for the PC is 8,N,1 no parity. There is no way to get more speed than that, and its not required anyway. This connection will work perfectly fine set like that.
Good luck.
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Old 03-09-2017, 07:53   #7
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Re: USB Rs485

Ok! I will do it. Thank you.
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