PRODUCT DATA
Series 61 and Series 62
Modutrol IV™ Motors
APPLICATION
The Series 61 and Series 62 Modutrol IV™ Motors are 
three-wire spring return and non-spring return floating control 
motors. Use these motors with controllers that provide a 
switched spdt or floating output to operate dampers or valves. 
The Series 62 motors have an internal electrically isolated 
feedback potentiometer that provides indication of the motor 
shaft position and can be used for slaving Series 90 Motors or 
rebalancing an external control circuit.
FEATURES
• Replaces M644, M944B,E,G,H,J,K,R,S and 
M945B,C,G,K,L,AD Motors.
• Integral junction box provides NEMA 3 weather 
protection.
• Integral spring return returns motor to normal position 
upon power failure.
• Motor and circuitry operate from 24 Vac. Models 
available with factory installed transformer, or a field 
added internal transformer.
• Quick-connect terminals are standard—screw terminal 
adapter is available.
• Adapter bracket for matching shaft height of older 
motors is available.
• Motors have field adjustable stroke (90° to 160°).
• Die-cast aluminum housing.
• Integral auxiliary switches are available factory 
mounted, or can be field added.
• Nominal timing standard of 30 seconds (90° stroke), 
and 60 seconds (160° stroke). Other timings available.
• Spring return motors can operate valve linkages from 
power end or auxiliary end shafts for normally closed 
or normally open valve applications.
• All models have dual shafts (slotted and tapped on 
both ends).
• All models have auxiliary switch cams.
• Fixed torque throughout the entire voltage range.
• Motors are designed for either normally open or 
normally closed valves and dampers.
• Series 62 models include electrically isolated  
potentiometer that provides shaft position indication.
• Series 62 TRADELINE models have linear feedback, 
configurable for slaving Series 90 Motors.
SPECIFICATIONS
Models: TRADELINE models are selected and packaged to 
provide ease of stocking, ease of handling and maximum 
replacement value. TRADELINE model specifications are the 
same as those of standard models unless specified otherwise.