On 1 January 2016 at 16:16, Peter C. Wallace <p...@mesanet.com> wrote: > SSerial is differential RS-422 at 2.5 MBits/sec and requires ~100 Ohm > differential cable cable impedance. This usually means twisted pairs > are required for TX and RX (the 5V/GND power connections are not critical)
The pairs are twisted inside the individual foil screen with drain wire then there are 4 other small (0.14mm2) wires and two bigger (0.5mm2) wires all inside an overall braided screen. I suppose the thing to do is to try it and see. I have determined that the pairs fit nicely in an RJ45 connector, but I can't decide what to do about the 2x 5V and 2x 0V positions in the connector. Are the 0V and 5V contacts commoned at the PCB ends, such that leaving two positions unpopulated in the RJ45 is OK? I only need enough 5V power to run the 7i73 logic. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
