WattMaster WCC III part 10 - Manual (Page 25)

10. RS-485 COMMUNICATIONS
WCC III Technical Guide 10-23
Figure 10-35: Replacing the RS-485 Driver Chip(s) on the TUC-5R / TUC-5R+ Controller
You must fi rst disconnect the 24VAC power and then disconnect the three-wire RS-485 communications loop connections before you can
attempt to remove or replace a RS-485 communications driver chip. Failure to do so may result in a damaged driver chip and/or damaged
circuit board(s).
Replacing RS-485 Driver Chip(s) on SAT 3P and TUC-5R
Figure 10-34: Replacing the RS-485 Driver Chip(s) on the SAT 3P Controller