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SUBMITTAL SHEETS
Modutrol IV Motor
M4185; M8185
M4185; M8185
Series 41 and Series 81 Modutrol IV
motors are 2-position (line- and
low-voltage per motor control)
spring-return motors. They are
used to operate dampers or valves
in applications where it is
necessary or desirable to have the
controlled element return to the
starting position in the event of
power failure or interruption.
SPECIFICATIONS
Application Type ..................................Damper; Valve
Fail Safe Mode .....................................Spring Return
Control Signal .......................................Two position, SPST
Torque/Force ........................................60 lb-in. (6.8 Nm)
External Auxiliary Switches Available ..Yes
Auxiliary Switch Ratings
AFL - 120 Vac .......................................7.2A
Auxiliary Switch Ratings
ALR - 120 Vac ......................................43.2A
Auxiliary Switch Ratings
AFL - 240 Vac .......................................3.6A
Auxiliary Switch Ratings
ALR - 240 Vac ......................................21.6A
Feedback .............................................No
Electrical Connections .........................Quick-connect terminals
Frequency ............................................50 Hz, 60 Hz
Mounting ..............................................Foot-mounted
Motor Shafts .........................................Dual-ended shaft
Shaft Shape ..........................................Square
Shaft Dimensions .................................0.375 in. (10 mm)
Deadweight Load on Shaft
(Either End) ..........................................200 lb.
Deadweight Load
(Combined on both Shafts) ..................300 lb
Ambient Temperature Range ...............-40 F to 150 F (-40 C to 60 C)
Weight ..................................................9.5 lb
APPROVALS
Canadian Standards Association .........Certified: File No. LR1620,
Guide No. 400-E
CE .........................................................EN55011 (Emission) EN50082-
2 (Immunity) 73/23/EEC (LVD)
Underwriters Laboratories, Inc. ............Listed File: E4436, Guide:
XAPX2
ACCESSORIES
Q7230A1005—Interface module, provides adjustable zero & span,
voltage or current control
220736A—Internal Auxiliary Switch Assembly - 1 Switch
220736B—Internal Auxiliary Switch Assembly - 2 Switches
50017460-001—24/120/230 Vac Internal Transformers for Series 2
Motors
50017460-003—120 Vac Internal Transformers for Series 2 Motors
4074ERU—Weatherproofing kit. Protects motor from driving rain when
mounted in any position
221455A—Infinitely adjustable Motor Crank Arm
FEATURES
• Fixed torque throughout the entire voltage range.
• Integral spring return returns motor to normal position when
power is interrupted.
• Integral junction box provides NEMA 3 weather protection if
motor is mounted in the upright position.
• Motor and circuitry operate from 24 Vac.
• 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 degrees).
• Motors are designed for either normally open or normally
closed valves and dampers.
• Integral auxiliary switches are available factory mounted, or
can be field added.
• Motors can operate valve linkages from the 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).
DIMENSIONS DIAGRAM
4-7/8
(124)
5-1/2
(140)
13/16
(20)
4-1/16 (103)
1/4
(7)
1-1/2 (37)
4-1/16 (103)
JUNCTION
BOX
MOTOR
AUXILARY
END
POWER
END
ADAPTER
BRACKET
2-9/16
(66)
5-3/8
(137)
6-7/16
(164)
9/16 (15)
3/4
(19)
TOP VIEW
4
(
1
2
1-1/2 (37)
3/4
(19)
13/16
(20)