
Siemens Combustion SQM50.481R1Z4R Actuator
The Siemens SQM50.481R1Z4R is a high-precision 120v reversing actuator engineered for the demanding requirements of industrial and commercial burner controls. Operating on a 110-120V AC supply at 50/60Hz, this modulating damper motor provides a robust 140 in-lb (15 Nm) torque, making it ideal for the accurate positioning of air and gas dampers, flow control valves, and butterfly valves. This model is factory-configured for clockwise (CW) rotation and features a 10mm round shaft with a keyway for secure coupling. Built with a versatile internal circuit board, the Siemens SQM50.481R1Z4R actuator accepts multiple analog control signals including 4-20 mA, 0-10 Vdc, and 0-135 Ω, allowing for seamless integration into existing combustion control systems. With 8 adjustable internal auxiliary switches, technicians can precisely define positions for ignition, low fire, and high fire purge, ensuring optimized combustion efficiency and reliable burner sequencing.
Key Benefits- Universal Compatibility: Supports various input signals (4-20 mA, 0-10 Vdc, 0-135 Ω) for versatile field integration.
- Enhanced Control: Features 8 internal switches for complex sequencing and burner light-off positions.
- High Torque Performance: Delivers 140 in-lb of torque with a 30-second running time for 90-degree rotation.
- Field Flexibility: Disengagement clutches for the drive shaft and camshaft allow for rapid manual alignment during commissioning.
- Industrial Durability: NEMA 4 rated housing options and UL/CSA listing ensure reliable operation in harsh boiler room environments.
How do I change the rotation direction on the SQM50.481R1Z4R?
While factory-set for clockwise rotation, the direction can be field-reversed by adjusting the internal wiring and cam scales according to the technical manual. Always refer to the red scales for CW and black scales for CCW operation.
Can I manually override the actuator during setup?
Yes, the unit features an Auto/Manual toggle switch. When set to 'Manual,' the forward/reverse toggle allows you to drive the motor to specific cam settings without an external control signal.
What happens if both Terminal A and Terminal Z are powered simultaneously?
Simultaneous power to the open (A) and close (Z) terminals will cause internal damage to the actuator. Ensure your burner control logic prevents concurrent signaling to these terminals.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $2,398.37
-65%$2,398.37
$839.43Siemens Combustion SQM50.481R1Z4R Actuator
The Siemens SQM50.481R1Z4R is a high-precision 120v reversing actuator engineered for the demanding requirements of industrial and commercial burner controls. Operating on a 110-120V AC supply at 50/60Hz, this modulating damper motor provides a robust 140 in-lb (15 Nm) torque, making it ideal for the accurate positioning of air and gas dampers, flow control valves, and butterfly valves. This model is factory-configured for clockwise (CW) rotation and features a 10mm round shaft with a keyway for secure coupling. Built with a versatile internal circuit board, the Siemens SQM50.481R1Z4R actuator accepts multiple analog control signals including 4-20 mA, 0-10 Vdc, and 0-135 Ω, allowing for seamless integration into existing combustion control systems. With 8 adjustable internal auxiliary switches, technicians can precisely define positions for ignition, low fire, and high fire purge, ensuring optimized combustion efficiency and reliable burner sequencing.
Key Benefits- Universal Compatibility: Supports various input signals (4-20 mA, 0-10 Vdc, 0-135 Ω) for versatile field integration.
- Enhanced Control: Features 8 internal switches for complex sequencing and burner light-off positions.
- High Torque Performance: Delivers 140 in-lb of torque with a 30-second running time for 90-degree rotation.
- Field Flexibility: Disengagement clutches for the drive shaft and camshaft allow for rapid manual alignment during commissioning.
- Industrial Durability: NEMA 4 rated housing options and UL/CSA listing ensure reliable operation in harsh boiler room environments.
How do I change the rotation direction on the SQM50.481R1Z4R?
While factory-set for clockwise rotation, the direction can be field-reversed by adjusting the internal wiring and cam scales according to the technical manual. Always refer to the red scales for CW and black scales for CCW operation.
Can I manually override the actuator during setup?
Yes, the unit features an Auto/Manual toggle switch. When set to 'Manual,' the forward/reverse toggle allows you to drive the motor to specific cam settings without an external control signal.
What happens if both Terminal A and Terminal Z are powered simultaneously?
Simultaneous power to the open (A) and close (Z) terminals will cause internal damage to the actuator. Ensure your burner control logic prevents concurrent signaling to these terminals.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Siemens SQM50.481R1Z4R is a high-precision 120v reversing actuator engineered for the demanding requirements of industrial and commercial burner controls. Operating on a 110-120V AC supply at 50/60Hz, this modulating damper motor provides a robust 140 in-lb (15 Nm) torque, making it ideal for the accurate positioning of air and gas dampers, flow control valves, and butterfly valves. This model is factory-configured for clockwise (CW) rotation and features a 10mm round shaft with a keyway for secure coupling. Built with a versatile internal circuit board, the Siemens SQM50.481R1Z4R actuator accepts multiple analog control signals including 4-20 mA, 0-10 Vdc, and 0-135 Ω, allowing for seamless integration into existing combustion control systems. With 8 adjustable internal auxiliary switches, technicians can precisely define positions for ignition, low fire, and high fire purge, ensuring optimized combustion efficiency and reliable burner sequencing.
Key Benefits- Universal Compatibility: Supports various input signals (4-20 mA, 0-10 Vdc, 0-135 Ω) for versatile field integration.
- Enhanced Control: Features 8 internal switches for complex sequencing and burner light-off positions.
- High Torque Performance: Delivers 140 in-lb of torque with a 30-second running time for 90-degree rotation.
- Field Flexibility: Disengagement clutches for the drive shaft and camshaft allow for rapid manual alignment during commissioning.
- Industrial Durability: NEMA 4 rated housing options and UL/CSA listing ensure reliable operation in harsh boiler room environments.
How do I change the rotation direction on the SQM50.481R1Z4R?
While factory-set for clockwise rotation, the direction can be field-reversed by adjusting the internal wiring and cam scales according to the technical manual. Always refer to the red scales for CW and black scales for CCW operation.
Can I manually override the actuator during setup?
Yes, the unit features an Auto/Manual toggle switch. When set to 'Manual,' the forward/reverse toggle allows you to drive the motor to specific cam settings without an external control signal.
What happens if both Terminal A and Terminal Z are powered simultaneously?
Simultaneous power to the open (A) and close (Z) terminals will cause internal damage to the actuator. Ensure your burner control logic prevents concurrent signaling to these terminals.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.











