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.
FEATURES
• 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 ornormally 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.
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.
IMPORTANT
The specifications given in this publication do not include normal manufacturing tolerances. Therefore, an individual unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions and some minor differences in performance can be expected if those conditions are changed.
Modutrol IV Order Number Guide: See Table 4.
Dimensions: See Fig. 2.
Lifetime
60,000 Full Stroke Cycles Repositions: 1.5 Million
Controller: These motors can be used with any electronic controller that provides a stable noise-free proportional current output as specified in Electrical Ratings, Input Range below.
Electrical Ratings:
Power Consumption: See Table 1.
Input Range: Current, Nonadjustable: 4 to 20 mA nominal, 25 mA maximum.
Current, Adjustable: 4 to 20 mA adjustable, 50 mA maximum.
Zero/Null (Motor Closed): 0.0 to 18 mA.
Span: 1.8 to 20 mA.
Voltage, Nonadjustable: 2 to 10 Vdc.
Input Impedance:
4 to 20 mA Input: 100 ohms.
2 to 10 Vdc Input: 400K ohms.
Auxiliary Switch Ratings (in Amps): See Table 2.
Stroke: Most models available with field adjustable strokes from 90° to 160°. Stroke adjusted by means of potentiometers located in the wiring compartment.
Timing: Nominal 30 seconds for 90° stroke and 60 seconds for 160° stroke.
Dead Weight Load On Shaft: 200 lb (91 kg) on motor power or auxiliary end; maximum combined load of 300 lb (136 kg).
Ambient Temperature Ratings: -40 to 150°F (-40 to 66°C).
Shaft: 3/8 in. (9.5 mm) square.
Motor Rotation:
Closed: Counterclockwise rotation limit as viewed from motor power end.
Mechanically Normally Closed: Spring return. Normally closed motors rotate to closed position on power loss. Electrically Normally Closed: Both spring return and non-spring motors return to closed position on minimum signal.
| Table 1. Series 72 Modutrol IV Motor Power Consumption Ratings (at 120 Vac, 50/60 Hz). |
| Model |
Power Consumption |
| VA |
Watts |
| M7284 |
15 |
13 |
| M7285 |
20 |
18 |
|
| M7294 |
15 |
13 |
| Table 2. Auxiliary Switch Ratings (in Amps). |
One Contact
Ratinga |
120V |
240V |
| Full Load |
7.2 |
3.6 |
|
| Locked Rotor |
43.2 |
21.6 |
|
a 40 VA pilot duty, 120/240 Vac on opposite contact.
Table 3. Primary 50017460-001 Color Code
| Lead Color |
Primary Voltage |
| Brown |
24 VAC |
| White |
120 VAC |
| Blue |
230 VAC |
| Black |
Common |
ORDERING INFORMATION
Audited Supplier 
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