Rotary Fail-Safe Actuator, MP-Bus

Communicative rotary actuator fail-safe for adjusting dampers with safety function in technical building installations

• Air damper size up to approx. 0.5 m²
• Torque motor 2.5 Nm
• Nominal voltage AC/DC 24 V
• Control modulating, communicative 2...10 V variable
• Position feedback 2...10 V variable
• Conversion of sensor signals
• Communication via Belimo MP-Bus

Product features

Mode of operation

The actuator moves the damper to the operating position at the same time as tensioning the return spring. The damper is turned back to the fail-safe position by spring force when the supply voltage is interrupted.
Conventional operation:
The actuator is connected with a standard control signal of 0...10 V and drives to the position defined by the control signal. Measuring voltage U serves for the electrical display of the damper position 0...100% and as control signal for other actuators.
Operation on Bus:
The actuator receives its digital control signal from the higher level controller via the MP-Bus and drives to the position defined. Connection U serves as communication interface and does not supply an analogue measuring voltage.

Converter for sensors

Connection option for a sensor (active sensor or switching contact). The MFT actuator serves as an analogue/digital converter for the transmission of the sensor signal via MP-Bus to the higher level system.

Parametrisable actuators

The factory settings cover the most common applications. Single parameters can be modified
with the Belimo Service Tools MFT-P or ZTH EU.