Data Sheet for Product

Technical Instructions SQM5… Reversing Actuators
Document No. 155-517P25
May 27, 2009
Page 2 Siemens Industry, Inc.
Features, Continued
• Connections for both base and face mounting
• Low hysteresis actuator and potentiometer gearing
• Externally visible position indication
• Selection of input and output signals
• Zero and span adjustment
• Field exchangeable circuit boards and potentiometers
• Electronic damper linearization function
• Split range and selectable parallel or master/slave operation
• Adjustable input signal override function
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.