I'm really sorry; I got confused and forgot the first pin is '0' not '1'.
Correct pin-out is:
Arduino Digital Pin 0 = RS485 Chip Data Output (Rx) with pull-up to 5V
Arduino Digital Pin 1 = RS485 Chip Data Input (Tx)
Arduino Digital Pin 2 = Rx/Tx 'Enable'; High to Transmit, Low to Receive
Please ignore the 'Pin 3' references in my first post. :-[