WattMaster WCC II - Manual (Page 242)

Section 5: Installation Guide
WCC II Operator’s Guide
Operator Interfaces 5-40
TUC-VR Communication Wires
The TUC-VR communication wires must be installed in the
manner shown. That is, the communication wire must go from the
SAT II-B to the fi rst TUC-VR, from the fi rst to the second, the
second to the third, etc.