800-543-9038
USA
866-805-7089
CANADA
203-791-8396
LATIN AMERICA / CARIBBEAN
30
EFB24-SR, EFB24-SR-S, EFX24-SR, EFX24-SR-S
Proportional, Spring Return, 24 V, for 2 to 10 VDC to 4 to 20 mA Control Signal
Accessories
IND-EFB
Damper position indicator
KH-EFB
Crank arm
K9-2
Universal clamp for up to 1.05” diameter jackshafts
TF-CC US
Conduit fitting
Tool-07
13 mm wrench
ZG-EFB
Crank arm adaptor kit
NOTE:
When using EFB24-SR, EFB24-SR-S, EFX24-SR and EFX24-SR-S actuators, only use
accessories listed on this page.
For actuator wiring information and diagrams, refer to Belimo Wiring Guide.
Typical Specification
Spring return control damper actuators shall be direct coupled type which require no
crank arm and linkage and be capable of direct mounting to a jackshaft up to a 1.05”
diameter. The actuator must provide proportional damper control in response to a 2 to
10 VDC or, with the addition of a 500
Ω
resistor, a 4 to 20 mA control input from an
electronic controller or positioner. The actuators must be designed so that they may be
used for either clockwise or counterclockwise fail-safe operation. Actuators shall use
a brushless DC motor controlled by a microprocessor and be protected from overload
at all angles of rotation. Run time shall be constant, and independent of torque. A 2 to
10 VDC feedback signal shall be provided for position feedback. Actuators with
auxiliary switches must be constructed to meet the requirements for Double
Insulation so an electrical ground is not required to meet agency listings. Actuators
shall be cULus Approved and have a 5 year warranty, and be manufactured under ISO
9001 International Quality Control Standards. Actuators shall be as manufactured by
Belimo.
Wiring Diagrams
1
Provide overload protection and disconnect as required.
2
CAUTION
Equipment Damage!
Actuators may be connected in parallel.
Power consumption and input impedance must be observed.
2
Up to 4 actuators may be connected in parallel if not mechanically mounted
to the same shaft. With 4 actuators wired to one 500
Ω
resistor.
Power consumption must be observed.
3
Actuator may also be powered by 24 VDC.
4
For end position indication, interlock control, fan startup, etc., EFB24-SR-S
and EFX24-SR-S incorporates two built-in auxiliary switches: 2 x SPDT, 3A
(0.5A) @250 VAC, UL Approved, one switch is fi xed at +10°, one is adjust-
able 10° to 85°.
5
Only connect common to neg. (–) leg of control circuits
The ZG-R01 500
Ω
resistor converts the 4 to 20 mA control signal to
2 to 10 VDC.
WARNING
Live Electrical Components!
G
During installation, testing, servicing and troubleshooting of this product, it may be
necessary to work with live electrical components. Have a qualifi ed licensed electrician or other
individual who has been properly trained in handling live electrical components perform these
tasks. Failure to follow all electrical safety precautions when exposed to live electrical compo-
nents could result in death or serious injury.
Control Signal
(+)
2 to 10 VDC
(–)
1 Common
2 + Hot
3 Y1 Input,
2 to 10V
5 U Output
2 to 10V
1
2
3
24 VAC Transformer
EFB24-SR, EFB24-SR-S
EFX24-SR, EFX24-SR-S
Line
Volts
W
068_EFB
(X
)24-S
R
2 to 10 VDC control
EFB24-SR, EFB24-SR-S
EFX24-SR, EFX24-SR-S
W069_EFB
(X
)24-SR
4 to 20 mA control with 2 to 10 VDC feedback output
EFB24-SR-S
EFX24-SR-S
10° to 85°
W064_EFB
(X
)24_SR_-
S
Auxiliary switches for EFB24-SR-S, EFX24-SR-S
N40103 - 09/11 - Subject to change.
© Belimo
Aircontrols (USA),
Inc.
