Servo drive for dampers, Belimo NF24A-S2 (11 53 81)

Description

Servo drives are used to control shut-off dampers or control damper modules. The drives are available in 24V and 230V versions, with continuous adjustment, open/closed control or 3-position control. The power or torque must be selected depending on the size of the dampers! The drives are available with or without an integrated auxiliary switch. The auxiliary switch – or potentiometer – can be retrofitted at any time. The angle of rotation can be changed using mechanical stops. A self-resetting button on the servomotor ensures simple manual adjustment even after installation. Operating principle of the spring return mechanism: The drive sets the damper to the operating position by simultaneously stretching the return spring. If the supply voltage is interrupted, the damper is moved to the safe position by the energy of the spring. In this way, the shut-off dampers in the exhaust shafts open automatically in the event of a power failure. Fresh air can continue to flow in through the openings for short-term emer