Paul Drummond wrote: i am planning on using category 5 wiring - is this possible ? its shielded but not twisted Further to my previous reply, I have just been reminded of the time I rigged a RS485 data link across a couple of fields using the barbed wire fencing. It did work - without problems. I hasten to add that it was a temporary installation. Regards Chris -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST