Siemens control motors are highly versatile modulating actuators used for the positioning of flow control valves, butterfly valves, dampers, or any application requiring rotary motion.

SQM5... reversing actuators are used for the positioning of flow control valves, butterfly valves, dampers, or any application requiring rotary motion. The SQM5, actuators accommodate control input signals of 4 to 20 mA, 0 to 135 Ω, 0 to 10 Vdc, 0 to 20 mA, position proportional and floating control. 

The available output signals include 4 to 20 mA, 0 to 135 Ω, 0 to 10 Vdc, 0 to 20 mA, and 0 to 1000 Ω. SQM5, actuators are available with up to six internal, easily adjustable switches. 

A selection of exchangeable circuit boards provide a variety of functions including auto/manual selector switch, manual forward/reverse toggle switch, zero and span adjustment, parallel or master/slave operation, split range control, input signal override, and selectable electronic linearization. 

The SQM5, is engineered for precision. It is particularly well suited for applications requiring a high degree of modulating accuracy and repeatability. 

The SQM5, actuator may be mounted in any position. A selection of mounting brackets and shafts provides installation flexibility and allows for the simple replacement of most competitive actuators.

The Siemens SQM5 is available in a wide range of torque ratings from 90 to 400 in-lbs. and running times of 8 to 50 seconds. A selection of exchangeable circuit boards provide a variety of functions including zero and span adjustment, parallel or master/slave operation, split range control, input signal override and selectable electronic linearization.

• Six easily accessible internal switches

• Auto/manual switch allows easy adjustments

• Externally visible shaft position indicator

• Highly modulating accuracy/rotational resolution

• Low hysteresis actuator with double-offset drive and potentiometer gearing

Application:

SQM5, actuators are uniquely suited for both industrial and commercial applications. The high level of accuracy permits precise modulating control of industrial process and process heating applications, often significantly enhancing performance and product quality.

In commercial and industrial burner applications requiring high turndown and reliable ignition, the auxiliary switches can be applied to create separate positions for burner ignition and low fire. In dual fuel applications, additional switches can be used to create separate high fire, low fire and ignition positions for each fuel. The economy position switch is used to drive the actuator to the full closed position when the burner is off.

In all applications, commissioning is simplified. Shaft and cam drum disengagement clutches allow for the quick manual alignment of the actuator shaft and switch cams. The forward/reverse toggle switch in combination with the auto/manual selector switch provides direct manual control.