Honeywell M6284F1078-F/U Modutrol actuator

The M6284F1078-F servo motors with astatic control, three-wire power supply and with or without spring return. They are used in the actuators of dampers or valves in combination with controllers that support single-pole switching in two directions or astatic control mode.

The M6284F1078-F/U servomotors are equipped with a built-in electrically isolated feedback potentiometer. This potentiometer is used to measure the position of the motor shaft and can be used for synchronization with the 90 series drive motors or for secondary balancing of the external control circuit.

Features

– Replacement of engines M644, M944B,E,G,H,J,K,R,S and M945B,C,G,K,L,AD.

– The built-in junction box provides protection against external conditions of the NEMA 3 class.

– The return spring returns the motor shaft to its normal position after the power is turned off.

– They operate from a voltage of 24 V AC, models are provided with an installed transformer or the possibility of installing an integrated transformer at the place of application.

– Quick-release terminals are standard, an adapter for threaded terminals is also provided.

– Adapter bracket for adjusting the height of the shaft position.

– Adjustable engine stroke at the installation site (from 90° to 160°).

– The body is made of die-cast aluminum.

– Built-in auxiliary switches can be installed by the manufacturer or added at the place of application.

– Nominal standard full stroke time of 30 seconds (90° stroke) and 60 seconds (160° stroke). Delivery with a different full-stroke time is possible.

– Spring return motors can be used to move the rods of normally open or normally closed valves from the drive and from the auxiliary end of the shaft.

– All models with shafts with two working ends (with a groove and an internal thread at both ends).

– All models are equipped with cams for auxiliary switches.

– Constant torque over the entire voltage range.

– Designed for normally open and normally closed valves and dampers.

– The M6284F1078-F/B servos are equipped with an electrically isolated feedback potentiometer measuring the position of the shaft.

– The M6284F1078-F actuators have a linear feedback characteristic and can be used to synchronize 90 series slave motors.

Technical specifications

Models: M6284 F 1078-F/U are selected and packaged in such a way as to facilitate warehousing, ensure ease of use and maximize the economic effect of replacement

The technical specifications of the M6284F 1078-F are the same as those for standard models, unless otherwise specified

Feedback resistance: 10kOhm

Sensitivity adjustment: No

Internal bypass: No

Linear Feedback: Yes

Shunt resistor for synchronization of 90 series slave motors: Out of stock

Rated power consumption: –

Rated ambient temperature: Maximum: 150°F (66°C) in 25% load cycle. Minimum: -40°F (-40°C)

Static load on the shaft: Drive or auxiliary end: no more than 200 lbs (90.8 kg)

Maximum full load: 300 lbs (136 kg). Crank: 3/8 inch square (9.5 mm)

Stroke: can be adjusted at the installation location from 90° to 160°

Gear drive: 1800

Number of moves: 29164

Engine speed: 810

Running time: 30

Number of steps: 182.275

Speed: 911

Accessories

– 220736A – A set of internal auxiliary switches; one switch that can be added at the place of application of the engine.

– 220736B – A set of internal auxiliary switches; two switches added at the place of application of the engine.

– 220738A – Adapter bracket that lifts the motor shaft 3/4 inch (19 mm) above the base to match previous Modutrol models.

– 220741A is a threaded terminal adapter that turns standard quick–release terminals into threaded terminals.

– 221455A is a smoothly adjustable crank link that can rotate through the lower position and pass near the base of the engine without installing an adapter bracket.

– 220738A – Adapter bracket for the Modutrol IV engine, which allows you to raise the shaft to the level corresponding to the Modutrol III engines.

– 4074ERU is a NEMA 3 class protection kit for Modutrol IV engines installed in any position except vertical.

– 50017460-001 – Built-in transformer; 24/120/230 V AC 50/60 Hz on the primary winding, 24 V AC on the secondary winding, quick-release terminals.

– 50017460-003 – Built-in transformer; 120 V AC 50/60 Hz on the primary winding, 24 V AC on the secondary winding, quick-release terminals.

– 221455ADW is a crank link that can rotate through the lower position and pass near the base of the engine without installing an adapter bracket.

– Q100 – Drive assembly for connecting the Modutrol motor to the throttle valve V51. Requires an adapter bracket 220738A.

– Q181 – Auxiliary potentiometer for serial or parallel control of additional modulating motors (series 90) in an amount from 1 to 4.

– Q5001 – Adapter bracket and drive assembly assembly for connecting the Modutrol motor IV to a water or steam valve.

– Q605 is a valve drive unit that allows you to connect the motor to the valve. The kit includes a crank on the motor shaft.

– Q607 is an external auxiliary switch, which is used to control auxiliary equipment by a signal of the position of the motor shaft.

– ES650-117 – Explosion-proof housing for installing the engine in an explosive atmosphere. Not applicable with Q5001 (or with other valve actuator assemblies).

Location

When choosing a location for the installation of the engine, it is recommended to provide enough space to accommodate accessories and ensure ease of maintenance. In case of outdoor installation, it is necessary to use moisture-proof connectors and a junction box that provides protection from external conditions according to NEMA 3 class.

When installing outdoors in any position other than vertical, it is recommended to install the 4074ERU Environmental Protection Kit. The environmental protection kit and the moisture-proof connectors must meet the protection requirements of the NEMA 3 class.

Mounting

Follow the instructions below to install the M6284F1078-F actuator correctly:

1. Position the motor so that the crank is in a horizontal position.

2. Use the holes in the mounting flanges extending from the base of the motor housing for mounting screws or bolts with a diameter of 1/4 inch (6.4 mm).

3. If the motor is not equipped with a spring return, it is supplied by the manufacturer in the closed position. In this case, it is the extreme position of rotation counterclockwise when viewed from the drive end of the shaft.