Belimo BF24-C134 - spring-return actuator for fire and smoke dampers

Belimo BF24-C134 – actuator for fire and smoke dampers

Spring-return actuator designed for 90° fire and smoke dampers in ventilation and air-conditioning systems. At the specified supply voltage, it moves the damper to its operating position and tensions the return spring. If the power supply is interrupted, the spring moves the damper to its safety position.

Key features

• Rated voltage: AC/DC 24 V; control: Close/Open.
• Motor torque: 20 Nm; safety function torque: 20 Nm (see service life).
• Motor running time: <60 s / 90°; safety function running time: <30 s @ 20°C.
• Rotation angle: max. 95°; motor direction of rotation selected by L/R mounting.
• Mechanical interface: form-fit connection 12x12 mm, blind hollow shaft.
• Two auxiliary switches 2x SPDT with switching points at 5° / 80° and a mechanical position indicator.
• Power consumption during operation: 10 W; in standby: 2 W; power rating for cable sizing: 12.5 VA.
• Cable connections: power/control 1 m, 2x 0.75 mm²; auxiliary switches 1 m, 6x 0.75 mm². Halogen-free cables.
• Degree of protection: IP54.

Without power, the actuator can be moved manually and fixed in the selected position. It can be released manually or automatically when voltage is applied. The actuator is adapted and mounted on the damper by the damper manufacturer.