Hi, I guess the repeaters simply repeat what is on one side of it to the other, automatically, regardless of direction - but check on this, i am unsure.
See http://www.rs485.com/pdifar44.html and http://www.amplicon.co.uk/dr-prod3.cfm/secid/4/groupId/11161/CFID/323534/CFT OKEN/23613045.htm for some ideas. -----Original Message----- Sent: 09 December 2003 14:34 To: Multiple recipients of list CHIPDIR-L At 06:14 09.12.2003 -0800, you wrote: >Hi, > >You can use RS485 repeaters to boost signal integrity and cable length. >In theory, there is no limit to the cable length if you use repeaters. The RS485 I'll use is half duplex (two wires). How can I control the data direction (enable the driver)? Edi >-----Original Message----- >Sent: 09 December 2003 14:04 >To: Multiple recipients of list CHIPDIR-L > > > >Hi all > >The RS485 is defined to a maximum lenght of 1200m at 400kbps. >I don't need 400kbps, but up to 2500m of cable. >Is it possible to extend to this lenght with 9600bps? > >Are there other standards for data transmission? >I have two wires (plus power and ground), one master and up to 20 slaves. >The maximum distance between two slaves is 500m. >A multimaster bus would be nice, but is not a must. > >The network should also work if the cable is broken (up to the break). >With RS485, I would switch the termination with a relais. > >What else... >Oh yes, the system is battery powered and should work fron 25�C to -40�C. > >Any ideas? > >Edi Im Hof > > > > > >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >+ IH electronic + Phone: ++41 52 320 90 00 + >+ Edi Im Hof + Fax: ++41 52 320 90 04 + >+ Doernlerstrasse 1, Sulz + URL: http://www.ihe.ch + >+ CH-8544 Rickenbach-Attikon + E-Mail: [EMAIL PROTECTED] + >+ Switzerland + + >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > >-- >Author: Edi Im Hof > INET: [EMAIL PROTECTED] > >Fat City Network Services -- 858-538-5051 http://www.fatcity.com >San Diego, California -- Mailing list and web hosting services >--------------------------------------------------------------------- >To REMOVE yourself from this mailing list, send an E-Mail message >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in >the message BODY, include a line containing: UNSUB CHIPDIR-L >(or the name of mailing list you want to be removed from). You may >also send the HELP command for other information (like subscribing). >-- >Author: Darren Logan > INET: [EMAIL PROTECTED] > >Fat City Network Services -- 858-538-5051 http://www.fatcity.com >San Diego, California -- Mailing list and web hosting services >--------------------------------------------------------------------- >To REMOVE yourself from this mailing list, send an E-Mail message >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in >the message BODY, include a line containing: UNSUB CHIPDIR-L >(or the name of mailing list you want to be removed from). You may >also send the HELP command for other information (like subscribing). ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + IH electronic + Phone: ++41 52 320 90 00 + + Edi Im Hof + Fax: ++41 52 320 90 04 + + Doernlerstrasse 1, Sulz + URL: http://www.ihe.ch + + CH-8544 Rickenbach-Attikon + E-Mail: [EMAIL PROTECTED] + + Switzerland + + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -- Author: Edi Im Hof INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Author: Darren Logan INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
