Hi Jason: RS-422 and RS-484 are differential systems BUT can be directly connected to RS-232 equipment. See: http://www.prc68.com/I/Trimpack.shtml#Com and look at the I/O cable paragraph and table. Pay no attention to the pin letters for the mil connector and read the footnotes under the table. Have Fun,
Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Jason Rabel wrote: > Interesting you would mention that! After my first post I pulled the board > with the connector and was looking at the traces from the DB-25. One of the > chips nearby is a SN75176AP which I found a PDF saying it is a differential > bus transceiver (RS422). I have a SBC that you can set the com port to > RS232/422/485, so that's one little hurdle overcome. > > There's quite a few pins wired, at first I was comparing it with the RS232 > DB-25 which most pins made sense. I should probably look up the others and > see how they differ and such (I'm clueless when it comes to RS422/485, so > I'll be googlin' tonight). > > Jason > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Jack Hudler > Sent: Wednesday, May 23, 2007 6:54 PM > To: 'Discussion of precise time and frequency measurement' > Subject: Re: [time-nuts] Kode 375-928 Display - Help! > > It might be RS-485 and so multiple displaies could have its own address on a > multidrop setup. > About the only trick there is finding out if its 2 or 4 wire 485 (probably 2 > because of the address). > Think I've seen some USB to 485 converters on the market, but you might get > away with driving it with RS-232. > Go Google RS-485 > > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
