Siemens GMA151.1U Spring Return Damper Actuator 24V 62 lb-in 2-10V

The Siemens GMA151.1U is an OpenAir GMA Series electric rotary damper actuator (also called a spring return modulating damper actuator). It delivers 62 lb-in (7 Nm) of torque and runs on 24 V AC/DC. It takes a 2 to 10 VDC control signal for modulating control of HVAC dampers. The spring return drives the damper to its fail-safe position if power is lost.

Key Features:

• Torque: 62 lb-in (7 Nm)
• Operating voltage: 24 V AC/DC (19.2 to 28.8 V), 50/60 Hz
• Control: 2 to 10 VDC modulating, with signal inversion
• Position feedback output
• Run time: 90 seconds to open, 15 seconds to close (spring return)
• Angular rotation: 90°
• Power consumption: 5 VA / 3.5 W running, 4 VA / 3 W holding
• Housing: NEMA 1 die-cast aluminum alloy enclosure, rated IP54
• Shaft compatibility: 1/4 to 3/4 in. round or 1/4 to 1/2 in. square shafts
• Attached 3 ft, 18 AWG connection cable
• Dimensions (W x H x D): 3.25 x 8.38 x 2.38 in
• Warranty: 60 months

This direct-coupled actuator mounts straight onto the damper shaft. Its compact size suits air damper control in commercial HVAC systems.