Series 72
Modutrol IV™ Motors
FEATURES
PRODUCT DATA
APPLICATION
The Series 72 Modutrol IV Motors are spring return and non-
spring return motors used to control dampers and valves. The
motors accept a current or voltage signal from an electronic
controller to position a damper or valve at any point between
open and closed.
• Replaces M734H,J,; M744S,T,Y; and M745L,S,T,Y
Motors.
• M7284, and M7294 are non-spring return motors;
M7285 are spring return motors.
• Integral spring return returns motor to normal position
when power is interrupted.
• Integral junction box provides NEMA 3 weather
protection.
• 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.
• Most 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.
• Models available with adjustable start (zero) and span.
• Models available with 4 to 20 mA input signal.
• Models available with 2 to 10 Vdc input signal.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 5
Settings and Adjustments ................................................. 8
Operation and Checkout ................................................... 11
Based on 63-2640—08
To Next Page
Need help?
General