Honeywell MS4120F Catalog Page
Direct Coupled Damper Actuators—Fire and Smoke
MS4120F; MS4620F; MS8120F
Fast-Acting, Two-Position Actuators, 175 lb-in
The MS8120F,S is a 175 lb-in (20Nm), spring return direct-coupled,
24 Vac actuator that accepts two position (SPST) 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
Actuator Type: Damper
Rotational Stroke: 95 ±3 degrees
Fail Safe Mode: Spring Return
Torque Rating: 175 lb-in. (20 Nm)
Minimum Driving Torque at 350 F: 175 b-in.
Spring Return Torque: 175 lb-in. (20 Nm)
External Auxiliary Switches Available: No
Electrical Connections: Teflon-jacketed cable
Electrical Connection Length: 40 in. (1 m)
Environmental Rating: NEMA2
Ingress Protection Rating: IP54
Frequency: 60 Hz
Manual operation: Manual crank
Mounting: Direct Coupled
Maximum Noise Rating, Holding (dBA @ 1m): 20 (no aud ble noise)
Maximum Noise Rating, Driving (dBA @ 1m): 70
Compatible Damper Shafts: 3/8 to 1.06 in. round or 3/8 to 11/16 in.
square (10 to 27 mm round or 10 to 18 mm square)
Shaft Adapter Type: Self-centering clamping
Materials: Aluminum housing
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)
Includes: Self-centering shaft adapter, 3mm crank
Comments: Two integral 3/8 in. flexible conduit connections
Approvals
CE: 89/336/ECC, 73/23/EEC
C-Tick: N314
Underwriters Laboratories, Inc: UL873, Plenum Rated
Canadian Underwriters Laboratories, Inc: cUL C22.2 No. 24-93
Commercial
Components
Product Number
MS4120F1006/U Two position;
MS4120F1204/U Two position;
MS4620F1005/U Two position;
MS4620F1203/U Two position;
MS8120F1002/U Two position;
MS8120F1200/U Two position;
Control
Signal
SPST
SPST
SPST
SPST
SPST
SPST
Timing (seconds)
Nominal
Driving
@ 60 Hz
15 sec 15 sec — 0.35A, 35W 0.15A, 10W 120 Vac
15 sec 15 sec 250 Vac, 5 A res 0.35A, 35W 0.15A, 10W 120 Vac
15 sec 15 sec — 0.20A, 35W 0.14A, 10W 230 Vac
15 sec 15 sec 250 Vac, 5 A res 0.20A, 35W 0.14A, 10W 230 Vac
15 sec 15 sec — 45 VA 10 VA 24 Vac
15 sec 15 sec 250 Vac, 5 A res 45 VA 10 VA 24 Vac
Maximum
Spring
Return
(sec) Driving Holding
Switch Ratings
70-6910 393
Power Consumption
Supply
Voltage
±10%
±10%
±10%
±10%
+20%, -10%
+20%, -10%
Number of
Internal
Auxiliary
Switch
0By
2By
0By
2By
0By
2By
Spring
Return
Direction
orientation
orientation
orientation
orientation
orientation
orientation
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