WattMaster WCC II - Manual (Page 231)

Section 5: Installation Guide
WCC II Operator’s Guide
Operator Interfaces 5-29
Addressing (Numbering) TUC’s
There can be up to 32 TUC’s connected together on a 3-wire
communication loop. In order for the SAT II-A to communicate
properly with each individual TUC, each TUC must be assigned
a separate address (number) from 1 to 32. The number is assigned
by positioning the small toggle switches on the TUC board in the
proper position. The toggle switches are housed together in a block
as shown below:
When the switch is in the “On” position, it represents the number
on the right in the above drawing. That is, when switch #3 is “On”
and all of the other switches are “Off,” the TUC is named #4. The
switches are additive. That is to say, when switches 1 and 2 are
“On,” the TUC is named #3.