Siemens Building Technology GBB166.1U NSR Electric Damper Actuator W/Dual Auxiliary 24 VAC 0-10 VDC

The Siemens Building Technology GBB166.1U NSR Electric Damper Actuator with Dual Auxiliary controls damper movement through a 24 VAC power supply and 0-10 VDC input signal. Its non-spring-return design rotates the connected damper shaft according to the controller command, regulating airflow within the ductwork in HVAC systems. It is fitted to supply, return, exhaust, and mixed-air dampers where accurate positioning is required. The actuator mounts onto the damper shaft and provides consistent movement during normal operation. Two auxiliary switches offer additional switching points for position indication, equipment interlocking, or control sequences within the air-handling system.