Jim Ruxton wrote: > Just curious how others might handle this scenario. Knowing very little about RS485 chips, I would just use a dual=20 opto-isolator with the output transistors in parallel. George smith --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .