Technical Data

1552

Power Supply

24 VAC, ±20%, 50/60 Hz, 24 VDC, ±20%

Power consumption in operation 1.5 W

Power consumption in rest

position

0.5 W

Transformer sizing

1.5 VA (class 2 power source)

Shaft Diameter

1/4...1/2” round, centers on 3/8”

Electrical Connection

695

Overload Protection

electronic throughout full rotation

Operating Range

2...10 V, 4...20 mA w/ ZG-R01 (500 Ω, 1/4

W resistor)

Position Feedback

2...10 V

Angle of rotation

0...287.5°, Without limitation: endless

With one end stop clip Z-ESCM: 315°

Torque motor

18 in-lb [2 Nm]

Direction of motion motor

by electrical installation

Position indication

Mechanically, pluggable (with integrated

magnet for gear disengagement)

Manual override

disengage with magnet

Running Time (Motor)

35 s, constant, independent of load

Ambient humidity

max. 95% r.H., non-condensing

Ambient temperature

-22...122°F [-30...50°C]

Storage temperature

-40...176°F [-40...80°C]

Degree of Protection

IP54, NEMA 2, UL Enclosure Type 2

Housing material

UL94-5VA

Agency Listing

cULus acc. to UL60730-1A/-2-14, CAN/CSA

E60730-1:02, CE acc. to 2014/30/EU and

2014/35/EU

Noise level, motor

45 dB(A)

Servicing

maintenance-free

Quality Standard

ISO 9001

Weight

0.56 lb [0.26 kg]

†Rated Impulse Voltage 800V, Type of Action 1, Control Pollution Degree 2.

Torque min. 18 in-lb, for control of damper surfaces up to 4.5 sq. ft.

Application

Damper actuator for operating air control dampers in ventilation and air-

conditioning systems for building services installations.

• For air control dampers up to approximately 4.5 sq ft

• Torque 2 Nm

• Nominal voltage AC/DC 24 V

• Control: 2 to 10 VDC

• Running time 35 sec. @ 90°

Operation

Simple direct mounting on the damper spindle with a universal spindle clamp

or form fit, supplied with an anti-rotation bracket to prevent the actuator from

rotating.

Manual operation is possible with a magnet (the gearing latch remains

disengaged as long as the magnet is in place).

Adjustable angle of rotation with mechanical end stops, that requires no tools to

move or remove.

The actuator is overload-proof, requires no limit switches and automatically

stops when the end stops is reached.

The CMB24-SR (-R or -L) actuator uses a brushless DC motor, which is

controlled by an Application Specific Integrated Circuit (ASIC). The ASIC

monitors and controls the actuator’s rotation sensing (DRS) function to prevent

damage to the actuator in a stall condition. Power consumption is reduced in

holding mode.

Belimo’s Halomo sensorless brushless DC motor spins by reversing the poles

of stationary electromagnets housed inside rotational permanent magnets. The

electromagnetic poles are switched by the an ASIC developed by Belimo. Unlike

the conventional DC motor, there are no brushes to wear or commutators to

foul. This means the brushless DC motor adds accuracy and reduces power

consumption in a holding mode.

Dimensions (Inches[mm])

CMB24-SR-R Technical Data Sheet

Modulating, Non-Spring Return, 24 V, for DC 2...10 V or 4...20 mA

800-543-9038 USA

866-805-7089 CANADA

203-791-8396 LATIN AMERICA / CARIBBEAN