Zone
Zone
SYSTEM CONNECTION
VCC-X Operator Interface SD
8
Power/Comm Board Wiring
Figure 5: Typical Power/Comm Board Wiring
A Power/Comm
Of
Using
. You Can Also Use
Another Power/Comm
Board, A System Manager Or A VAV/Zone
Controller.
Cable Can Be Used To
Connect With The MiniLink PD Instead
2 Conductor Twisted Pair With Shield
Cable A Power/Comm
Cable To Connect With
Power/Comm Cable To Power/Comm
System Manager, Or VAV/Zone Controllers On Local Loop Only.
Other Board(s),
If Desired, Instead Of Using A
Power/Comm Cable, You Can Use 2
Conductor Twisted Pair With Shield
Cable To Connect To The Power/
Comm Board From The Unit
Controller, MiniLink PD, Or Another
Power/Comm Board.
Line Voltage
24VAC
R
SH
T
R
SH
T
R
SH
T
R
SH
T
All Comm Loop Wiring Is
Straight Thru
Local Loop RS-485
9600 Baud
Local Loop RS-485
9600 Baud
24VAC Transformer (By Others)
4 Amp Slow Blow Fuse
WARNING!
DO NOT GROUND THE 24V TRANSFORMER
THAT IS TO BE USED WITH THE POWER/COMM
BOARDS. GROUNDING OF THE TRANSFORMER
WILL DAMAGE THE POWER/COMM BOARD
AND ALL BOARDS CONNECTED TO IT. A
SEPARATE TRANSFORMER MUST BE USED
FOR EACH POWER/COMM BOARD. NO
EXCEPTIONS. DO NOT CONNECT ANY OTHER
DEVICES TO THE TRANSFORMER USED FOR
THE POWER/COMM BOARD!
NOTE:
Diagram Shown Is For Wiring Of
Power/Comm Board When Used
For Connecting Local Loop Devices
Such As VAV/Zone Controllers,
System Manager(s) and Other
Power/Comm Boards.
C US
R
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