WattMaster WCC III part 10 - Manual (Page 28)

10. RS-485 COMMUNICATIONS
WCC III Technical Guide 10-26
Replacing RS-485 Driver Chips on the SAT 3C/D/F
Figure 10-39: Replacing the RS-485 Driver Chip(s) on the SAT 3C/D/F
34063A
74 H C 04
3406
3A
SAT 3C/D REV3 RS485 DRIVER LOCATION "U5"
THIS RS485 DRIVER IS FOR "SAT" COMM
REPLACE THE 75176 CHIP WITH THE
LT1785 CHIP
SAT C/D/F REV 3 TUC RS485 DRIVER
LOCATION "U16"
REPLACE THE 75176 CHIP WITH THE
LT1785 CHIP