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Honeywell MS4120F, MS8120F Fast-Acting, Two-Position Actuators

Fast-Acting, Two-Position Actuators
MS4120F, MS8120F
Spring return direct coupled actuators (DCA) for on/off damper
control with an integral junction box. The actuator accepts an on/
off signal from a single-pole, single-throw (SPST) controller. They
are designed to operate reliably in smoke control systems
requiring Underwriter's Laboratories Inc. UL555S ratings up to
350 F.

Spring return direct coupled actuators (DCA) for on/off damper control with an integral junction box. The actuator accepts an on/off signal from a single-pole, single-throw (SPST) controller. They are designed to operate reliably in smoke control systems requiring Underwriter's Laboratories Inc. UL555S ratings up to 350 F.

• Brush DC submotor with electronic stall protection for 2-position models
• Self-centering shaft adapter (shaft coupling) for wide range of shaft sizes
• Models available for use with two-position, single pole single throw (SPST), line- (Series 40) or low- (Series 80) voltage controls
• Metal housing with built-in mechanical end limits
• Spring return direction field-selectable
• Shaft position indicator and scale
• Manual winding capability with locking function
• UL (cUL) listed and CE compliant
• All Models are plenum-rated per UL873

Select a link under the "item" tab below to order.

Cat #Control SignalNominal Driving @ 60 HzMaximum Spring ReturnDrivingHoldingSupply VoltageNumber of Internal Auxiliary SwitchSwitch Ratings
MS4120F1006Two position; SPST15 sec15 sec0.35A, 35W0.15A, 10W120 Vac ±10%0-
MS4120F1204Two position; SPST15 sec15 sec0.35A, 35W0.15A, 10W120 Vac ±10%2250 Vac, 5 A res(3 A ind)
MS8120F1002Two position; SPST15 sec15 sec45 VA10 VA24 Vac +20%, -10%0
MS8120F1200Two position; SPST15 sec15 sec45 VA10 VA24 Vac +20%, -10%2250 Vac, 5 A res (3 A ind)
Actuator Type: Damper
Rotational Stroke: 95 ±3 degrees
Fail Safe Mode: Spring Return
Torque: 175 lb-in. (20 Nm)
Maximum Stall Torque: 425 lb-in. (48 Nm)
Minimum Driving Torque at 350 F: 175 lb-in. (20 Nm)
Spring Return Torque: 175 lb-in. (20 Nm)
Spring Return Direction: By orientation
External Auxiliary Switches Available: No
Electrical Connections: Teflon-jacketed cable
Electrical Connection Length: 40 in. (1 m)
Environmental Rating: NEMA2
Frequency: 60 Hz
Manual operation: Manual crank
Mounting: Direct Coupled
Maximum Noise Rating, Holding (dBA @ 1m): 20 (no audible noise)
Maximum Noise Rating, Driving (dBA @ 1m): 70
Compatible Damper Shafts: 3/8 to 1.06 round or 3/8 to 11/16 square (10 to 27 round or 10 to 18 square)
Shaft Adapter Type: Self-centering clamping
Materials: Aluminum housing
Ingress Protection Rating: IP54
Operating Humidity Range (% RH): 5 to 95% RH, non-condensing
Ambient Temperature Range: -40 F to +130 F (-40 C to +55 C)
Storage Temperature Range: -40 F to +140 F (-40 C to +60 C)
Weight: 8 lb (3.63 kg)
Approvals:
CE: 89/336/ECC, 73/23/EEC
C-Tick: N314
Underwriters Laboratories Inc. UL873, Plenum Rated
Underwriters' Laboratories of Canada: cUL C22.2 No. 24-93
Includes: Self-centering shaft adapter, 3mm crank
Comments: Two integral 3/8 in. flexible conduit connections


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