34
BAS-SVX48H-EN
IImmppoorrttaanntt:: The controller must receive AC power from a dedicated power circuit. Failure to
comply may cause the controller to malfunction. Do Not run AC power wires in the
same wire bundle with input/output wires. Failure to comply may cause the
controller to malfunction due to electrical noise.
Connecting 24 Vac Secondary Wires
1. Connect the 24 Vac secondary wires from the transformer to the 24 Vac and terminals on the
UC400 Controller (refer to the illustration below). Perform one of the following methods to
ensure the controller is adequately grounded:
a. Connect a grounding pigtail at some point along the secondary wire that runs between
the controller terminal and the transformer.
b. Ground one of the terminals on the controller to the enclosure (if the enclosure is
adequately grounded) or to an alternate earth ground.
2. Connect the 24 Vac secondary wires from the transformer to the 24 Vac and ground terminals
on the controller as shown below.
Figure 15. Connecting 24 Vac Secondary Wires for UC400 and UC400-B
VAC
24
XFRM
VAC
24
VAC
24
BI
1
BI
2
BI
3
LINK
IMC
+
24
VDC
BI
4
AO1
BI
5
AO2
UI
1
UI
2
AI
3
AI
2
AI
1
AI
4
AI
5
P
1
P
2
CNCNO
BO3
CNCNO
BO2
CNCNO
BO1
RELAYS
ADDRESS
TRIAC SUPPLY TRIACS
A
BO9BO8BO7BO6BO5BO4
A BB
TX
RX
LINK
IMC
SERVI
C
E
SERVICE TOOL
CONNECT AC POWER TO THE TRAIC SUPPLY TO POWER THE TRIACS
BO1 BO2 BO3 BO4 BO5 BO6 BO7 BO8 BO9
1
2
3
4
5
6
7
8
9
IM
C
1
IM
C
1
3
4
5
6
7
1
2
3
4
5
6
7
8
9
8
9
x1
24 Vac
Transformer
Alternate Ground Method
A pigtail connection may be necessary between earth
gr
ound and/or enclosure ground if the device is not
grounded through one leg of the transformer wiring.
24VAC
GND
24VAC
GND
24VAC
GND
J15 J16
BO1
24VAC
BO2
24VAC
BO3
24VAC
PhoenixPhoenix
1 2 3 4 5 6 1 2 3 4 5 6
Alternate
Ground
Method
24 Vac
Transformer
3. Ground the unit using one of the following methods:
NNoottee:: The UC400-B is grounded through mounting screws so external grounded is not
required.
a. Connect a grounding pigtail at some point along the secondary wire that runs between
WWiirriinngg IInnssttaallllaattiioonn
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