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ML6275
Spring Return
Direct Coupled Rotary Actuator
PRODUCT DATA
FEATURES
• Mounts directly on horizontal 3/8 in., 1/2 in., and
5/8 in. round and square damper shafts by using
the appropriate insert. Most models are shipped with
1/2 in. insert.
•Provides 25 lb-in. running and spring return torque.
•Magnetic coupling eliminates the need for mechanical
stops or limit switch adjustments by limiting stall
torque to 60 lb-in. maximum.
•95° stroke provides necessary compression of rubber/
neoprene ga
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR Ambient Temperature Range: SPECIFICATIONS -30°F to +140°F (-35°C to +60°C) Models ML6275: Spring Return Direct Coupled Rotary Actuators Storage Temperature: ML6275A: Low Torque (25 lb-in.) Direct Coupled Rotary -30°F to 150°F (-35°C to 65°C) Actuator without auxiliary switches or time-out function ML6275C: Low Torque (25 lb-in.) Direct Coupled Rotary Humidity: Actuator with two line voltage rated auxiliary switches 5 to 95 percent relative humi
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR 1-5/32 (29) 6-25/32 (173) 1-17/32 (39) 3-1/16 (79) 8-9/32 (210) 3-29/32 (99) 23/32 3-15/16 (100) (18) 1-21/32 (42) 3-1/2 (89) 1-5/8 1-9/32 (41) (32) CLEARANCE 1/2 (13) REQUIRED 3-29/32 FOR SPLINED (99) HUB MOUNTING 1-13/32 1-3/32 (36) (28) o 135 o ± 15 13/32 13/64 (5) (10) 3/4 (19) 5/16 (8) 3/8 1-13/32 (36) (10) 4-13/32 (112) 1-5/8 (41) 10-13/32 (264) M8257 MOUNTING BRACKET Fig. 1. Approximate dimensions of ML6275 Spring Return Di
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR INSTALLATION CAUTION Do not use the actuator as a shaft bearing. The actuator must be used only to supply rotational torque. When Installing this Product… To prevent damage to the actuator, avoid any side Read instructions carefully. Failure to follow them could loads to the actuator output coupling bearings. damage the product or cause a hazardous condition. Check ratings and description given in the specifications to make sure the product
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.500 ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR The ML6275 Direct Coupled Actuator has a reversible output Installing the Actuator for Three-Point Mounting hub. The hub is factory-mounted on the top of the actuator The ML6275 Direct Coupled Actuator is designed with gear housing. When attaching to damper shafts less than 3.5 removable hub sleeves to accommodate specific damper in. (76 mm) long, or for ease of mounting, the output hub can shaft sizes. Proper sleeve selection is necessary
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR 1 INDICATOR DETENTS 1 COUNTERCLOCKWISE SPRING ROTATION ARROW M7230A Fig. 4. ML6275 Actuator mounted for counterclockwise spring rotation with output hub inside actuator. (NOTE: NEMA rating applies only with damper shaft in horizontal position.) 6 63-2493—1 90 60 60 30 30 0
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.500 ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR M7229 Fig. 5. Standard direct coupled mounting of ML6275 to a damper with counterclockwise spring rotation. 7 63-2493—1 .500 90 60 60 30 30
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.500 500 ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR Wiring CAUTION Disconnect power supply before wiring to prevent electrical shock or equipment damage. All wiring must comply with local electrical codes, ordinances and regulations. The ML6275 is designed for use with a Class 2 power supply. Voltage and frequency of the transformer used must correspond with the characteristics of the motor and those of the power supply. See Fig. 8 for a typical wiring connection. The ML6275 has an alum
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR WHITE/RED 12° AUX. SWITCHES OPERATION 3A, 120 VAC WHITE/BLUE WHITE/YELLOW The ML6275 Direct Coupled Actuator is designed to be used BLACK/RED 82° in ventilating and air conditioning installations to operate BLACK/BLUE dampers, ventilation flaps and louvers requiring up to 25 lb-in. M7227A BLACK/YELLOW torque. If the power fails, the actuator will spring return to the starting position. The actuator is designed for reversible Fig. 9. ML6275C,F w
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR FULLY COUNTERCLOCKWISE SPRING RETURN INDICATOR START POSITIONS POINTER AT 90° POINTER AT 0° 90 90 60 60 60 60 30 30 30 30 0 0 0 0 DETENT IN INSERT DETENT IN INSERT DRIVE CLOCKWISE TO CLOSE DRIVE CLOCKWISE TO OPEN (REVERSE ACTING) (DIRECT ACTING) FULLY CLOCKWISE SPRING RETURN INDICATOR START POSITIONS POINTER AT 90° POINTER AT 0° 90 90 60 60 60 60 30 30 30 30 M7235 0 0 0 0 DETENT IN INSERT DETENT IN INSERT DRIVE COUNTERCLOCKWISE DRIVE COUNTERCL
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR 4. Connect 24 Vac to the appropriate leadwires (red to CHECKOUT blue or red to yellow) to move the damper to the opposite position. The ML6275 should drive the The ML6275 Direct Coupled Actuator can be checked out damper. either directly or by using a controller. 5. If the actuator does not run, verify that the actuator is properly installed for either cw or ccw Important rotation. When power is interrupted, the actuator returns to 6
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ML6275 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario QUALITY IS KEY M1P 2V9 63-2493—1 G.R. Rev. 11-95 Printed in U.S.A. 12 63-2493—1 www.honeywell.com/building/components
