
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
32
N40067 - 7/11 - Subject to change. © Belimo Aircontrols (USA), Inc.
Wiring for Damper Actuators and Control Valves
On/Off, 24V, 120 or 230V
SY Actuator Wiring Diagram, SY1…5-24 – Multiple Wiring
SY1…12-110 (220) – Multiple Wiring
Observe class 1 and class 2 wiring restrictions.
Transformer sizing = SY actuator draw X 1.25 (safety margin)
(Ex. SY2-24 requires 3.0A x 1.25 = 3.75A,
3.75A X 24 VAC = 90VA Transformer).
Indicates an action or condition that may cause irreversible damage to the
actuator(s) or associated equipment.
Equipment damage!
Power consumption and input impedance must be observed.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury. It may also be used to alert against unsafe practices.
Warnings and Cautions appear at appropriate sections throughout this
manual. Read these carefully.
Hazard Identification
INSTALLATION NOTES
24V AC Transformer
Line
Voltage
G Ground
1 Common
3 Open
4 Closed
5
6
7
HTR
A
B
C
D
E
F
LS3
A-C
(Open Indication)
LS4
D-F
(Closed Indication)
Contact Rating: 5A 250 VAC Max.
SY2…5-24
G Ground
1 Common
3 Open
4 Closed
5
6
7
HTR
A
B
C
D
E
F
LS3
A-C
(Open Indication)
LS4
D-F
(Closed Indication)
Contact Rating: 5A 250 VAC Max.
SY2…5-24
K1
Open
Close
K1-B
K1-A
Actuator A
Actuator B
G Ground
1 Common
3 Open
4 Closed
5
6
7
HTR
A
B
C
D
E
F
LS3
A-C
(Open Indication)
LS4
D-F
(Closed Indication)
Contact Rating: 5A 250 VAC Max.
G Ground
1 Common
3 Open
4 Closed
5
6
7
HTR
A
B
C
D
E
F
LS3
A-C
(Open Indication)
LS4
D-F
(Closed Indication)
Contact Rating: 5A 250 VAC Max.
SY2…12-110 (220)
SY2…12-110 (220)
Open
Close
K1-B
K1-A
Actuator A
Actuator B
120 or 230 VAC
N L1
H L2
NOTES
sCaution: Power Supply Voltage.
s)SOLATIONRELAYSMUSTBEUSEDINPARALLELCONNECTIONOFMULTIPLEACTUATORS
using a common control signal input.
s(,CANNOTBECONNECTEDTOTERMINALANDSIMULTANEOUSLY
sRequired: 4ERMINALNEEDSTOBEFIELDWIREDTOENABLEHEATERCIRCUIT
SY1 -24
A
B
C
E
F
Contact Rating: 5A 125 VAC Max.
3A 250 VAC Max.
A-B (Open Indication)
LS4
LS3
A-E (Closed Indication)
SY1-110 (220)
A
B
C
E
F
Contact Rating: 5A 125 VAC Max.
3A 250 VAC Max.
A-B (Open Indication)
LS4
LS3
A-E (Closed Indication)
SY1 Contact Arrangements
G
G
G
K1
G
W549_11
*
*
* The isolation relays may not be needed.
Dependent on signal
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