Siemens SQM50.543A80B Servo Motor With Potentiometer
24 Volt AC
The SQM50.543A80B actuators are used to drive gas or air dampers of oil and gas burners of medium to large capacity.

They are used primarily for load-dependent control of the amounts of gas, oil and combustion air:
• In connection with 3-position or modulating controllers (e.g. 4...20 mA), or
• Directly by burner controls

• Features
• Reversible electromotoric actuators delivering torques up to 40 Nm
• Running times from 10 to 90 seconds
• With 1 or 2 drive shaft ends; drive shafts are available as separate items and can be exchanged
• Can be equipped with electronic modules for control and position indication
• Internal and external position indication
• Drive shaft and cam shaft can be separately disengaged