WattMaster WCC III part 10 - Manual (Page 2)

TABLE OF CONTENTS
SECTION 10:
RS-485 COMMUNICATIONS AND
TROUBLESHOOTING
WCC III – MCD and SAT III Type
Controllers “RS-485 Network Loop”
Communications ....................................... 10-1
SAT 3C/D/F TUC Loop Communications ... 10-2
RS-485 Wire Considerations ..................... 10-3
Power and Switchable RS-485
Communications Board ............................ 10-3
24VAC Power Wiring Considerations ....... 10-5
Typical WCC III System Communications
Wiring – Not the recommended and
preferred way ............................................ 10-6
Typical WCC III System Communications
Wiring – The recommended and
preferred way ............................................ 10-7
Lightning Suppression .............................. 10-8
MCD Communications Troubleshooting
with a Digital Voltmeter ........................... 10-9
SAT III Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-10
SAT 3C/D/F Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-11
SAT 3P Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-13
TUC-2R Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-14
VAVZ II Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-16
TUC-5R Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-17
RTU-17 Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-19
Global Bridge Communications
Troubleshooting with a
Digital Voltmeter ..................................... 10-21
Replacing RS-485 Driver Chips ............... 10-22