m7284c1000

Honeywell M7284C1000 Modutrol Motor

$990.00

Honeywell M7284C1000 is a spring & non-spring return motor used to control dampers and valves.

2 in stock

SKU: M7284C1000 Category: Brand:

Description

  • 24 VAC Power Supply Operation: Motor and internal control circuitry operate efficiently from standard 24 VAC power sources in commercial HVAC and burner control systems.
  • Quick-Connect Wiring Terminals: Features quick-connect terminals as standard for fast wiring connections, with optional screw terminal adapters available for traditional lead wire setups.
  • Field-Adjustable Stroke Range: Provides an adjustable rotation stroke from 90 to 160 degrees, allowing precise physical alignment with connected damper and valve linkage mechanics.
  • Shaft Height Adapter Compatibility: Supports an optional adapter bracket to match the shaft centerline height of legacy Modutrol motors for seamless field retrofits and replacements.
  • Auxiliary Switch Customization: Accommodates internal auxiliary limit switches (factory installed or field added) for position feedback, staging control, or safety interlock switching.
  • Proportional Modulating Control: Accepts 4 to 20 mA current or 2 to 10 VDC voltage control signals for accurate, step-free position modulation across dampers and industrial valves.
  • Dual Shaft Output Design: Features double-ended drive shafts to enable simultaneous mechanical linkage connections to multiple dampers, valves, or auxiliary position potentiometers.

Documentation

Technical Specifications

Part Number M7284C1000
Manufacturer Honeywell
Series Modutrol IV
Type Proportional Foot-Mounted Actuator
Voltage 120 VAC, 50/60 Hz
Torque 150 lb-in
Control Signal Proportional 4–20 mA
Timing 30 to 60 seconds nominal
Enclosure NEMA 3
Weight 10 lbs

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Description

The Honeywell M7284C1000 is a non-spring return Modutrol IV motor designed for the modulating control of dampers and valves in HVAC and combustion systems. This foot-mounted actuator accepts a 4-20 mA input signal from a controller to accurately position the damper or valve linkage anywhere within its adjustable 90° to 160° stroke. With a 150 lb-in torque rating, it ensures reliable operation of even large dampers.

Designed for flexibility and ease of use, the M7284C1000 includes dual-ended, 3/8-inch square shafts, allowing for linkage connections from either side of the motor. It is equipped with two internal auxiliary switches, which can be used for signaling end-of-travel positions or interlocking with other equipment. An integral junction box provides NEMA 3 weather protection. The quick-connect terminals simplify wiring, and with a 30-60 second timing, it offers responsive yet stable control for maintaining precise airflow or fluid rates in demanding applications.

Frequently Asked Questions

What is the input impedance of the 4-20 mA control circuit, and how does it affect the controller's output?

The input impedance for the M7284C1000's 4-20 mA circuit is 235 Ω. It is crucial to ensure that the analog output of your controller can drive this load. The total loop resistance (including wire resistance and the 235 Ω of the actuator) must be less than the maximum load specified by the controller manufacturer to maintain signal integrity and ensure accurate positioning.

What are the electrical ratings and adjustment points for the two internal auxiliary switches?

The two internal single-pole, double-throw (SPDT) auxiliary switches (S1 and S2) have a resistive rating of 7.2 A at 120 VAC. They are independently adjustable throughout the motor's stroke via internal cams. To adjust, you loosen the cam locking screw, rotate the cam to the desired switching point, and then retighten the screw. This allows for precise setting of end-of-travel signals or for interlocking with other equipment at specific points in the stroke.

Can multiple M7284C1000 motors be wired in parallel from a single controller output?

Yes, it is possible to wire multiple M7284C1000 motors in parallel from a single 4-20 mA signal. However, the controller's analog output must have sufficient capacity to drive the combined parallel load. Since each motor has an impedance of 235 Ω, wiring two motors in parallel results in a total impedance of approximately 117.5 Ω (1/(1/235+1/235)). You must verify that your controller's output can handle this lower impedance (higher current draw) without signal degradation. Always consult the controller's specifications for its maximum current output and minimum load resistance.

Can the M7284C1000 replace older Honeywell Modutrol motors?

Yes, the M7284C1000 can replace legacy Modutrol motor models. Honeywell offers an optional shaft height adapter bracket (221278N) to match the footprint and shaft centerline of older motor frames during retrofits.

How do you adjust the stroke angle on the Honeywell M7284C1000?

The stroke is field adjustable from 90 to 160 degrees using an internal stroke adjustment mechanism under the motor top cover. This allows technicians to fine-tune rotation to match the exact travel range required by connected damper linkages or valves.

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