On 9/11/09, Olin Lathrop wrote: > David Duffy (AVD) wrote: > > I am planning to deploy a network of (approx 70) remote devices via > > CAT5E cabling. It will carry 24Vdc as well as RS485 data at a low > > speed (2400 baud at a guess). > > I don't know what your constraints are, but RS-485 is so 1990s. Nowadays > CAN is a better alternative in most cases. You get the low level collision > detection, retry, and message checksum validation all handled transparently > by the silicon in the microcontroller. You have to do these things manually > in the firmware with RS-485. CAN works at 1km ? Vasile -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist