WattMaster WCC III User Manual part 20
19. Power and Switchable
Comm Board
WCC III
19. Power and Switchable
Comm Board
T ABLE OF CONTENTS
SECTION 19: POWER AND
SWITCHABLE COMM BO ARD
Overview ...................................................19-1
Power and Switchable RS-485 Communications
Board Application Drawing .................................................19-2
WCC III System Overview .........................19-3
Diagram of WCC III System ......................19-4
WCC III - MCD Typical System
Architecture ..............................................19-5
Typical WCC III System Communications
Wiring – Not the recommended and
preferred way ............................................19-6
Typical WCC III System Communications
Wiring – The recommended and
preferred way ............................................19-7
19. POWER AND SWITCHABLE COMM BOARD
GND
24VAC
GND
24VAC
24VAC
24VAC
24VAC
24VAC
24VAC
24VAC
24VAC
GND
GND
GND
GND
GND
GND
GND
24VACGND
24VAC
GND
485 COMM IN
POWER IN
POWER & SWITCHABLE COMM
WATTMAS TER CONTROLS IN C.
YS102224 REV 0
MADE IN USA JRN
T
R
SH
TSHR
R
SH
T
TSHR TSHR TSHR TSHR TSHR TSHR TSHR TSHR
Introduction
SECTION 19:
POWER AND SWIT CHABLE COMM
BOARD
__________________________________________
The Power and Switchable Comm Board was designed to
be used as a central connection point for the SAT III RS-485
communications loop.
Eight push-button switches are provided to disconnect the RS-485
communications loop for troubleshooting purposes.
The RS-485 communication connections are as follows: “R”
to “R”, “T” to “T”, and “SHLD” to “SHLD” or “SH”. These
connections are from Satellite-type controller to Satellite-type
controller. These eight push-button switches only disconnect
the RS-485 communications loop. THEY DO NOT SWITCH
POWER ON/OFF .
This Power and Switchable Comm Board may also be used as a
central connection point for the SA T 3C/D/F TUC communications
loop.
The RS-485 communication connections are as follows: “R” to
“R”, “T” to “T”, and “SHLD” to “SHLD” or “SH”. This RS-485
communications connection is from TUC Controller to TUC
Controller. But, on the SAT 3C/D/F Controller, the TUC “R”
connection must be wired to the SAT 3C/D/F “T” connection, and
the SAT 3C/D/F Controller “R” connection must be wired to the
TUC “T” connection. This is a carry over connection method from
the old SAT 2C/D Controller.
The WCC III Power and Switchable Comm Board has 9 status
lights. The functions of these lights or LEDs are listed below:
• D9 - This LED will be lit any time power is applied to
the WCC III Power and Switchable Comm Board.
•
SW1 to SW8 - These eight LEDs will be lit any time a
corresponding push button is depressed to connect
the RS-485 communications to the corresponding eight
communication ports.
Figure 19-1: The Power and Switchable Comm Board
WCC III Technical Guide
1
19-1
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