Belimo S2A 2-SPDT Auxiliary Switch

The Belimo S2A Auxiliary Switch is a multifunctional accessory for damper and rotary actuators with a 2-SPDT configuration in HVAC systems. This part works based on a carrier plate which can be fitted to the shaft of the actuator or the position indicator to enable accurate position signaling and control. The switching points are variable by turning a knob so that they can set them to the most convenient values. They can be used with any of the NSR actuators and is suited for different HVAC systems including the control of airflow in ventilation systems.