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-
+
-
+
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+
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R
E
F
1
2
R
S
4
8
5
C
O
M
M
B
U
S
RED
BLACK
RED
BLACK
TWIST SHIELD WIRES
TOGETHER - DO
NOT
CONNECT TO BOARD
A
N
A
L
O
G
IN
P
U
T
S
+
-
+
-
+
-
+
-
R
E
F
1
2
R
S
4
8
5
C
O
M
M
B
U
S
RED
BLACK
RED
BLACK
TWIST SHIELD WIRES
TOGETHER - DO
NOT
CONNECT TO BOARD
A
N
A
L
O
G
IN
P
U
T
S
VAV/VVR
1-1
VAV/VVR
1-2
CHANNEL RS485 COMMUNICATIONS BUS
CHANNEL 1
CONTROLLERS 3-64
FROM BASYX UBE EXPANDERS
Figure 10: Typical VAV / VVR Communications Connection Details
SETTING THE DEVICE ADDRESS
If the VAV / VVR is used as a stand alone controller make sure that the address is set to #1.
If more than one VAV / VVR is used on the same communications bus then each device must have a different
address for proper communication. Removing the clam shell cover from the BASYX VAV assembly will expose the dip
switch which sets the individual controller address. Refer to Appendix 1 for setting the device address to a number
between 1 and 64. The communication address for each device must be unique.
NOTE:
Do not skip addresses in a daisy chain; begin at 1 and count up. The boards do not
have to be in consecutive order, however all addresses must be included.
