RS232 to RS485 Converter

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reflectarray

Joined: 06 Nov 2006
Posts: 68
Helped: 4

24 Jan 2007 4:50 rs232 rs485 converter schematic

Hi, I want to convert from RS232 to RS485, maybe anyone here could help how to do that ( schematic ,etc). I would like to use Maxim IC.

Thank you for your assistance.

Jerry_June

Joined: 24 Dec 2006
Posts: 59
Helped: 5
Location: Cambodia

24 Jan 2007 5:11 rs232 to rs485 converter schematic

may u reed this tutorial, i hope that it can help u. r go to http://www.data-wiz.com/RS232_data_interface.htm.

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budhy

Joined: 21 Oct 2006
Posts: 836
Helped: 185
Location: Indonesia

24 Jan 2007 5:15 rs232 to rs485 converter

Try this :

MAX3160E, MAX3161E, MAX3162E
±15kV ESD-Protected, +3.0V to +5.5V, 10nA, RS-232/RS-485/RS-422 Multiprotocol Transceivers

App Note 723
Selecting and Using RS-232, RS-422, and RS-485 Serial Data Standards

RS232 to RS485 Converter

Figure 8. The MAX3162 converts bidirectionally between RS-232 and RS-485 signals in a point-to-point application.

RS232 to RS485 Converter

Figure 9. The MAX3162 converts bidirectionally between RS-232 and RS-485 signals in a multipoint application.

Last edited by budhy on 24 Jan 2007 6:07; edited 3 times in total

buntheun

Joined: 20 Dec 2006
Posts: 78
Helped: 6
Location: Cambodia

24 Jan 2007 5:20 rs232 to rs485 schematic

dear friend
i think it can help u !!
RS232 to RS485 Converter

narccizzo

Joined: 20 Jan 2006
Posts: 173
Helped: 4
Location: PATZCUARO,MICHOACAN,MEXICO

24 Jan 2007 5:55 rs485 max232

This one works I made it some time ago, you can feed it with 7 to 12VDC
jp1 controls the baud on = 4800, off (default) = 9600,
jp2 controls the number of bits on = 9, off (default) = 8
jp3 connect the 120 ohms resistor to the 485 line.
The microcontroller avoid the ds3696 transceiver to read data when the max232
is reading data from the 232 port, when 232 ends another circuit connected
to the 485 line can send data.
Hope this hepls.

regards narccizzo

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umup

Joined: 04 Aug 2006
Posts: 99
Helped: 12

26 Jan 2007 21:38 rs232 to 2-wire rs485 converter schematic

This one was made some time ago - opto isolated, auto direction switching.
Inputs TTL-compatible

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umup

Joined: 04 Aug 2006
Posts: 99
Helped: 12

30 Jan 2007 6:32 how to convert rs485 to rs232

Or look at http://www.rs485.com/pconverters.html

funnynypd

Joined: 09 May 2007
Posts: 918
Helped: 21
Location: USA & Canada

11 Nov 2007 17:42 maxim rs232 to rs485

Take a look of my hardware converter design:
User manual is here:
http://www.edaboard.com/download.php?id=132393
or
http://www.auelectronics.selfip.com/Au_Group_Electronics_CVT485_CB0702_RevA_10_31_2007_User_Manual.pdf

Here is a RS485 to RS232 Convertor picture (product provides the lowest price on the market and life-time warranty):
http://www.auelectronics.selfip.com/System-485.htm
RS232 to RS485 Converter

info_req

Joined: 20 Jun 2007
Posts: 44
Helped: 1

17 Nov 2007 14:24 conversor rs232 a rs485 con pic+pdf

idas given above are excellent try anyone of them or otherwise try below
convert rs232 (max232) to ttl and then to rs485(ds9638/ds9637 by dallas) etc.

funnynypd

Joined: 09 May 2007
Posts: 918
Helped: 21
Location: USA & Canada

17 Nov 2007 15:45 maxim max3162 convert

info_req wrote:

idas given above are excellent try anyone of them or otherwise try below
convert rs232 (max232) to ttl and then to rs485(ds9638/ds9637 by dallas) etc.

This is exactly the design which makes our "RS485 Convertor" product Completely Auto-Sensing and Self-Adjusting (Baud rates and Data Formats) as a bus converter. Very Happy

Here is one picture of the CVT-485 product:
RS232 to RS485 Converter

web link:
http://www.auelectronics.selfip.com/System-485.htm

funnynypd

Joined: 09 May 2007
Posts: 918
Helped: 21
Location: USA & Canada

30 Jun 2009 4:04 convertidor rs232 a rs 485

Now all 4 editions of CVT485 are available at our on-line store:
http://www.auelectronics.com/products/system/cvt485.html

senthilkumar

Joined: 24 Nov 2001
Posts: 668
Helped: 4
Location: india

30 Jun 2009 4:55 rs232 to rs422 converter schematic

use simple MAX485 or 481

pjyc

Joined: 10 May 2001
Posts: 19

30 Jun 2009 5:53 rs485 + picture

Hi.

Attached PDF file is RS-232 to RS-485/422 Converter schematic.
It can support RS-422 and RS-485 to change only two jumppers.
And it used general devices.
75176 can be replaced max485, 65LBC184 etc.

Regards,
pjyc

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funnynypd

Joined: 09 May 2007
Posts: 918
Helped: 21
Location: USA & Canada

02 Jul 2009 4:49 rs-232 to rs-485 converter schematic

CVT 485 accessories:
RS232 to RS485 Converter

RS232 extension cable:
RS232 to RS485 Converter

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02 Jul 2009 4:49 Ads

Medtronic

Joined: 19 May 2005
Posts: 164
Helped: 11
Location: Egypt

04 Nov 2009 22:41 Re: RS232 to RS485 Converter

i need s7-200 converter

techyfubky

Joined: 07 Jul 2007
Posts: 32
Location: India

11 Nov 2009 12:33 RS232 to RS485 Converter

what is the puporse of S7-200 convertor you are aiming for ...? is it to communicate your programming device with PLC or you what to establish free port communication with some PC.