MS4120F; MS4620F; MS8120F; S2024-F; S20230-F Fast-Acting,Two-Position Actuators

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Product information

Spring Return Direct Coupled Actuators, 20 Nm (175 lb-in) torque.

✔ Torque: 20 Nm (175 lb-in)

✔ Power Supply: 24 VAC (MS8120F, S2024-F), 120 VAC (MS4120F), 230 VAC (MS4620F, S20230-F)

✔ Control Signal: 2-Position (On/Off)

✔ Safety Mechanism: Spring return on power failure (Fail-Safe)

🏭 APPLICATIONS

• Heating, Ventilation, and Air Conditioning (HVAC) systems
• Control of return and exhaust air dampers
• Air Handling Units (AHU, PAU)
• Applications requiring automatic fail-safe open/close during emergencies

📥 DOWNLOAD HONEYWELL MS SERIES CATALOG (PDF)

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Technical characteristics
Name of the product
Standard technical document

Features

Designed specifically for smoke control systems, UL555S listed for safe operation at temperatures up to 350°F (176°C).
Powerful minimum 20 Nm (175 lb-in) torque that does not degrade in high-temperature environments.
Reversible mounting allows for spring return configuration in either clockwise (CW) or counterclockwise (CCW) direction.
Highly durable stainless steel return spring, with extremely fast spring return timing of only 15 seconds upon power loss.
Extremely quiet operation: Emits no noise (only 20 dBA) while holding position.
Energy-saving technology maintains torque at low power consumption (only 10W holding).
Rugged die-cast aluminum housing with an exclusive self-centering shaft adapter (SCSA).

Specifications

Brand	HONEYWELL
Actuator Type	Spring Return Fail-Safe
Control Signal	2-Position (On/Off - SPST)
Torque	20 Nm (175 lb-in)
Voltage (Model MS4120F)	120 VAC ±10%, 60 Hz
Voltage (Model MS4620F, S20230-F)	230 VAC ±10%, 50/60 Hz
Voltage (Model MS8120F, S2024-F)	24 VAC / VDC (+20%, -10%), 50/60 Hz
Power Consumption	35W (Driving) / 10W (Holding)
Spring Return Timing	15 seconds (Typical)
Maximum Stroke	95° ± 3°
Design Life	30,000 Cycles
Enclosure Rating	NEMA 2, IP54
Ambient Temperature	-40°C to 55°C (-40°F to 130°F)
Operating Noise	Driving: 70 dBA \| Holding: 20 dBA (Very quiet)
Approvals	UL873, UL555S, CE, C-Tick

🎥 Product Videos

1. Introduction to Honeywell Damper Actuators

2. Honeywell MS4620F1005 Damper Actuator (230 VAC)

Model	Tên Hàng Hóa (Mô tả chi tiết)
MS4609F1010/B	Bộ dẫn động van gió Honeywell MS4609F1010/B - Loại 2 vị trí (On/Off)
MS4609F1210/B	Bộ dẫn động điều chỉnh lưu lượng gió Honeywell, Model MS4609F1210/B
MS4620F1005/B	Thiết bị dẫn động truyền lực cho van gió Honeywell MS4620F1005/B
MS4620F1203/B	Bộ dẫn động điều chỉnh lưu lượng gió Honeywell, Model MS4620F1203/B
MS7510A2008	Bộ dẫn động van điều chỉnh lưu lượng gió, Model MS7510A2008
MS7510A2008/U	Bộ dẫn động van điều chỉnh lưu lượng gió, Model MS7510A2008/U
MS8109F1010/B	Bộ dẫn động van điều chỉnh lưu lượng gió Honeywell MS8109F1010/B
MS8109F1210/B	Bộ điều khiển lưu lượng gió Honeywell, Model MS8109F1210/B
MS8120F1002/B	Bộ dẫn động van điều chỉnh lưu lượng gió Honeywell, Model MS8120F1002/B
MS8120F1200/B	Bộ dẫn động van điều chỉnh lưu lượng gió Honeywell, Model MS8120F1200/B

MS4120F; MS4620F; MS8120F;

S2024-F; S20230-F Fast-Acting,

Two-Position Actuators

PRODUCT DATA

FEATURES

•

175 lb-in. (20 Nm) minimum driving torque at 350°F

(176°C).

•

Reversible mounting facilitates use in either clockwise

(cw) or counterclockwise (ccw) spring rotation.

•

Integral spring return ensures level of return torque.

Stainless steel internal spring.

Fifteen-second spring return timing.

No special cycling required during long-term holding.

(See Operation section.)

•

No audible noise during holding.

Patent pending design eliminates need for limit

switches to reduce power consumption.

•

Models available for 24, 120, and 230 Vac applications.

Ninety-five degree angle of rotation.

Actuator holds rated torque at reduced power level.

Die-cast aluminum housing.

Housing design allows flush mounting to damper.

Self-centering shaft adapter (SCSA), patent pending.

APPLICATION

The MS4120F, MS4620F, MS8120F, S2024-F, and S20230-F

Fast-Acting, Two-Position Actuators are spring return direct

coupled actuators (DCA) for on/off damper control. The

actuator accepts an on/off signal from a single-pole, single-

throw (spst) controller. Reversible mounting allows actuator to

be used for either clockwise (cw) or counterclockwise (ccw)

spring rotation.

Designed to operate reliably in smoke control systems

requiring Underwriter’s Laboratories Inc. UL555S

ratings up to 350°F.

MS4120F, MS4620F, MS8120F

•

High temperature Teflon lead wires.

Designed to operate reliably in smoke control systems

requiring Underwriter’s Laboratories Inc. UL555S ratings up to

350°F.

Models available with integral high temperature (350°F)

SPST position-indicating switches (7°, 85° stroke).

S2024-F, S20230-F

APPLICABLE LITERATURE

•

Double-insulation rating.

•

High-temperature, halogen-free, silicone-free

leadwires.

— Specification Data Sheet

— Motor/Actuator Selection Guide

for Damper Applications

— Engineering Manual of Automatic Control

(also called The Gray Manual)

— Direct Coupled Actuator

63-2592

63-8419

77-1100

•

Models available with integral high temperature (350°F)

SPDT position-indicating switches (7°, 85° stroke).

Quick Selection Guide

— Damper Torque Calculator

63-8553

63-8437

Put Bar Code Here

63-2584-10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

Design Life (at Rated Voltage): 30,000 full stroke cycles.

SPECIFICATIONS

Minimum Damper Shaft Length:

1 in. (25 mm); 3-1/4 (83 mm) recommended.

Models: See Tables 1, 2, and 3.

Table 1. Models.

Voltage Internal Auxiliary

Cycling Requirements:

Prolonged holding-period (1 year) testing of these actuators

has been performed with no spring return failures. The

actuator and the internal spring are designed to require no

special cycling during long-term holding.

Model

MS4120F1006

in Vac

Switches

None

2 SPST

None

120

Honeywell recommends following all local, state and national

codes for periodic testing of the entire smoke control

system. Refer to National Fire Protection Association

(NFPA) National Fire Codes®: NFPA90A, NFPA92A and

NFPA92B for your application.

NFPA recommends periodic examination of each fire/smoke

damper (semi-annually or annually) to ensure proper

performance.

MS4120F1204

120

MS4620F1005

MS4620F1203

230

2 SPST

None

MS8120F1002

MS8120F1200

2 SPST

None

S2024-F (MS8120S1006)

S20230-F (MS4620S1009)

Mounting: Self-centering shaft adapter.

Round Damper Shafts: 0.5 to 1.06 in.

230

Square Damper Shafts: 1/2 to 3/4 in.

Actuator can be mounted with shaft in any position.

S2024-F-SW2 (MS8120S1204) 24

S20230-F-SW2 (MS4620S1207) 230

2 SPDT

IMPORTANT

Internal switches are designed to pass UL555S

requirements (at 350°F).

•

Honeywell does not recommend using linkages with

these actuators because side-loading of the output

hub reduces actuator life.

Dimensions: See Fig. 1.

•

3/4 in. or greater shaft diameter recommended.

Device Weight:

MS4120F, MS4620F, S20230-F: 7.5 lb (3.4 kg)

MS8120F, S2024-F: 6.25 lb (2.8 kg)

Noise Rating at 1m (Maximum):

Driving or Spring Return: 70 dBA.

Holding: 20 dBA (no audible noise).

Stroke: 95° ± 3°, mechanically limited.

Vibration:

Not suitable for high vibration applications (Example installa-

tion environment: Truck Trailers or Railroad Cars)

Acceptable Vibration Levels 0.6g at 30 to 300 Hz.

Electrical Ratings:

Power Input:

MS4120F: 120 Vac ±10%, 60 Hz.

MS4620F,S; S20230-F: 230 Vac ±10%, 50/60 Hz.

MS8120F,S; S2024-F: 24 Vac +20%, -10%, 50/60 Hz

(Class 2).

Temperature Ratings:

Ambient: -40°F to 130°F (-40°C to 55°C).

Shipping and Storage: -40°F to 140°F (-40°C to 60°C).

Power Consumption:

MS4120F: Driving: 0.35A, 35W. Holding: 0.15A, 10W.

MS4620F,S; S20230-F:

Driving: 0.20A, 35W. Holding: 0.14A, 10W.

MS8120F,S; S2024-F: Driving: 45 VA. Holding: 10 VA.

IMPORTANT

The actuator is designed to meet UL555S standards

at 350°F (176°C). The actuator must be tested with

the damper to achieve this rating.

Electrical Connections:

NOTE: The actuator is designed to operate for 30 min-

utes during a one-time excursion to 350°F

(176°C).

Lead Wires:

MS4120F, MS4620F, MS8120F: 1m Teflon wire.

MS4620S, MS8120S, S2024-F, S20230-F: 1m halogen-

free, silicone-free wire.

Humidity Ratings: 5% to 95% RH noncondensing.

Two integral 3/8 in. flexible conduit connections.

Environmental Protection Ratings:

NEMA2 and IP54 when mounted on a horizontal shaft and the

base of the actuator below the shaft.

Timing (At Rated Torque and Voltage):

Drive Open: 15 seconds typical.

Spring Close: 15 seconds typical.

Accessories:

205649 Mounting Bracket (not supplied with actuator).

Auxiliary Switches:

Dry Contact

Ratings (maximum load): 250 Vac, 5A resistive.

Settings (fixed): 7° nominal stroke, 85° nominal stroke.

Approvals: See Table 4.

Controller Type:

MS4120F: Line voltage (120 Vac), 2-position, spst (Series 40).

MS4620F,S; S20230-F: Line voltage (230 Vac), 2-position,

spst (Series 40).

MS8120F,S; S2024-F: Low voltage (24 Vac), 2-position, spst

(Series 80).

Torque Rating (at Rated Voltage):

Typical Holding (minimum at 350°F): 175 lb-in. (20 Nm).

Spring Return (minimum at 350°F): 175 lb-in. (20 Nm).

Stall Maximum (fully open at 75°F): 425 lb-in. (48.0 Nm).

350°F Minimum Driving: 175 lb-in. (20 Nm).

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

3-15/16 (100)

Table 2. Actuator Selection (MS Series)

M Electrical Motor

2 (50)

S Fail Safe Function (Spring Return)

1-9/16

(40)

41 120 Vac 2-position Control; Reversible Mount

Spring Return

46 230 Vac 2-position Control; Reversible Mount

Spring Return

81 24 Vac 2-position Control; Reversible Mount

Spring Return

20 175 lb-in. (20 Nm)

F Fire and Smoke (US)

1 No Feedback

10-11/16

(271)

8-5/8

(220)

0 No Auxiliary Switches

2 Two Auxiliary Switches

XX System Controlled Numbers

M S 41 20 F 1 2 XX

Table 3. Actuator Selection (S20 Series).

S Fail Safe Function (Spring Return)

20 20 Nm (175 lb-in.)

24 24 Vac 2-position Control; Reversible Mount

M20051

1/4 (6)

2-15/16 (75)

Spring Return

Fig. 1. Dimensional drawing of actuator in in. (mm).

230 230 Vac 2-position Control; Reversible Mount

Spring Return

F Fire and Smoke Actuator

No Auxiliary Switches

-SW2 Two Auxiliary Switches

S 20 24

F -SW2

Table 4. Approvals.

MS4620F,

MS4120F MS8120F S20230-F S2024F

UL/cUL

UL873 Plenum X

Rating, File

No. E4436;

Guide No.

XAPX.

C-TICK

Plenum applications require that conductors be enclosed in

conduit (see Wiring section for conduit details).

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

Determine Appropriate Mounting

Orientation

INSTALLATION

See Fig. 2 for mounting orientation.

When Installing this Product...

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazardous

condition.

2. Check the ratings given in the instructions and on the

product to make sure the product is suitable for your

application.

NOTES:

—

Actuators are shipped in the fully closed position.

An arrow molded into the hub points to tick marks

on the label to indicate the hub rotary position.

See Fig. 3 for proper mounting to a square

damper shaft.

—

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

CCW TO CLOSE

(FAIL-SAFE

POSITION)

CW TO CLOSE

(FAIL-SAFE

POSITION)

CW TO OPEN

CCW TO OPEN

WARNING

Electrical Power Hazard.

Line voltage can cause death or serious injury

and short equipment circuitry.

Disconnect power supply before installation.

CAUTION

Electrical Shock or Equipment Damage Hazard.

Low voltage can shock individuals or short

equipment circuitry.

M20052

Disconnect power supply before installation.

Fig. 2. Spring Return DCA mounting orientation.

IMPORTANT

All wiring must agree with applicable codes,

ordinances and regulations.

Location

The actuators are designed to open a damper by driving the

damper shaft in either a clockwise

or counterclockwise

direction. The actuator housing has two slots on the

bottom, either of which, with a 205649 Mounting Bracket,

secures it flush to a damper box (see Fig. 2).

DAMPER SHAFT

M21007

Fig. 3. Proper mounting to square damper shaft.

Measure Damper/Valve Shaft Length

NOTE: When mounted correctly, these slots allow the

actuator to float without rotating relative to the

damper shaft.

If the shaft is less than three inches in length, the shaft

coupling must be located between the damper/valve and

actuator housing. If the shaft length is more than three inches,

the shaft coupling may be located on either side of the

actuator housing.

CAUTION

Equipment Damage Hazard.

Tightly securing actuator to damper housing can

damage actuator.

If the coupling must be moved from one side of the actuator to

the reverse, follow these instructions (see Fig. 4):

1. Remove the retainer clip from the shaft coupling and set

it aside for later use.

2. Remove shaft coupling from one side of the actuator.

3. Replace the shaft coupling on the opposite side of the

actuator aligning it based on the stroke labelling.

4. Replace the retainer clip on the shaft coupling using the

groove of the coupling.

Mount actuator to allow it to float along its vertical axis.

Preparation

Before mounting the actuator onto the damper shaft,

determine the:

— Damper/valve opening direction for correct spring return

rotation. The actuator can be mounted to provide clockwise

or counterclockwise spring return.

— Damper shaft size (see Specifications section).

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

5. Turn damper blades to desired normal (closed) position.

6. Place actuator and mounting bracket back into position

and secure bracket to damper box with sheet metal

screws.

7. Using 10 mm wrench, tighten shaft coupling securely

onto damper shaft using minimum 120 lb-in., maximum

180 lb-in. torque.

M20054A

Fig. 4. Mounting shaft coupling to actuator opposite side.

Mounting

CAUTION

Device Malfunction Hazard.

Improper shaft coupling tightening causes device

malfunction.

Tighten shaft coupling with proper torque to prevent

damper shaft slippage.

CAUTION

Actuator Damage Hazard.

Using actuator as shaft bearing causes device

damage.

Use actuator only to supply rotational torque. Avoid

any side loads to actuator output coupling bearings.

To mount actuator, proceed as follows:

1. Place actuator over damper shaft; and hold mounting

bracket in place. See Fig. 5.

2. Mark screw holes on damper housing.

3. Remove actuator and mounting bracket.

4. Drill or center-punch holes for mounting screws (or use

no.10 self-tapping sheet metal screws).

ENSURE THAT MOUNTING ASSEMBLY PREVENTS ACTUATOR

ROTATION AND ALLOWS ACTUATOR TO FLOAT ALONG

INDICATED AXIS. WHEN TOO TIGHT, THE RESULTING BINDING

CAN DAMAGE THE ACTUATOR OR REDUCE TORQUE OUTPUT.

ACCESSORY MOUNTING BRACKET IS NOT SUPPLIED WITH

THE ACTUATOR.

M20055

Fig. 5. Mounting actuator to damper housing.

NOTE: If necessary, use a field-fabricated steel base

plate secured with sheet metal screws.

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

IMPORTANT

Manual Positioning

1. All wiring must comply with local electrical codes,

The actuator can be operated with no power present. Use this

feature during installation or to move and lock the damper or

valve shaft position when there is no power.

ordinances and regulations.

2. Voltage and frequency of transformer used with

MS8120F,S and S2024-F must correspond with the

characteristics of power supply and actuator.

To operate the manual positioning:

1. If the power is on, turn it off.

NOTE: The conduit fittings are designed for use with 3/

8 in. reduced-wall steel or aluminum flexible con-

duit.

2. Insert supplied hex wrench (key) as shown in Fig. 6.

3. Rotate key in the direction indicated on the cover.

4. Once the desired position is reached, hold the key to

prevent the spring return from moving the actuator.

MS8120F

NOTE: No detente for fire and smoke actuators. If key

is released, actuator will return to spring

closed position.

(

)

BLACK

RED

24 VAC

GREEN

BLUE

7° AUXILIARY

SWITCH

BLUE

YELLOW

85° AUXILIARY

SWITCH

M20053A

Fig. 7. Typical 24 Vac wiring (MS Series).

MS4120F

(

)

WHITE

120 VAC

BLACK

GREEN

(

)

BLUE

7° AUXILIARY

SWITCH

BLUE

ROTATING

M32268

YELLOW

85° AUXILIARY

SWITCH

Fig. 6. Manual positioning.

M20056A

WIRING

Fig. 8. Typical 120 Vac wiring (MS Series).

See Fig. 7 through 11 for typical wiring diagrams.

MS4620F

WARNING

(

)

BLUE

Electrical Power Hazard.

Line voltage can cause death or serious injury and

short equipment circuitry.

230 VAC

BROWN

GREEN

(

)

Disconnect power supply before installation.

BLUE

7° AUXILIARY

SWITCH

BLUE

CAUTION

YELLOW

Electrical Shock or Equipment Damage Hazard.

Disconnect all power supplies before installation.

Motors with auxiliary switches can have more than one

disconnect.

85° AUXILIARY

SWITCH

M20057A

Fig. 9. Typical 230 Vac wiring (MS Series).

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

S2024-F-SW2, MS8120S

S20230-F-SW2, MS4620S

(

)

(

)

BLUE

230 VAC

BROWN

(

)

(

)

GRAY/BLUE

GRAY/RED

GRAY/BLUE

GRAY/RED

85° AUXILIARY

SWITCH

85° AUXILIARY

SWITCH

GRAY/YELLOW

BLACK/BLUE

BLACK/RED

BLACK/YELLOW

BLACK/BLUE

BLACK/RED

BLACK/YELLOW

7° AUXILIARY

SWITCH

7° AUXILIARY

SWITCH

M20680A

M20678A

Fig. 11. Typical 230 Vac wiring (S20 Series).

Fig. 10. Typical 24 Vac wiring (S20 Series).

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

OPERATION

CHECKOUT

The actuators are designed for use in Smoke Control

MS4120F (120 Vac model)

Systems. If power fails, the actuator spring returns to the 0°

position. The actuator mounts flush with the damper box. The

actuator drives from 0° to 95° and spring returns back to 0°.

1. Check damper position.

2. Connect 120 Vac to the black and white leadwires to

drive the damper to the open position. The actuator

should drive the damper.

3. If the actuator does not run, remove power for at least

two seconds.

4. If the actuator spring returns, allow it to close entirely,

then return to step 2.

5. If the actuator does not spring return, verify that the

actuator is properly installed. See Installation section.

6. If the actuator is correctly installed but neither runs nor

spring returns, replace the actuator.

The actuators are operated by an spst two-position controller.

When using an spst two-position controller, the actuator drives

to the damper fully open position when controller contact

makes and spring returns to the damper fully closed position

when controller contact breaks. The actuator drops to holding

power level on detection of stall, independent of hub position.

Cycling

The actuator and the internal spring are designed so that no

special cycling during long-term holding is required.

MS4620F; S20230-F (230 Vac

models)

Honeywell recommends following all local, state, and national

codes for periodic testing of the entire smoke control system.

Refer to National Fire Protection Association (NFPA) National

Fire Codes : NFPA90A, NFPA92A, and NFPA92B for your

application.

1. Check damper position.

2. Connect 230 Vac to the blue and brown leadwires to

drive the damper to the open position. The actuator

should drive the damper.

3. If the actuator does not run, remove power for at least

two seconds.

Auxiliary Switches

Some models include auxiliary switches (see Table 1).

4. If the actuator spring returns, allow it to close entirely,

then return to step 2.

5. If the actuator does not spring return, verify that the

actuator is properly installed. See Installation section.

6. If the actuator is correctly installed but neither runs nor

spring returns, replace the actuator.

SPST Switches (Table 5)

See Fig. 7 through 9 for SPST auxiliary switch wiring.

Table 5. SPST Auxiliary Switch Operation.

Makes

Breaks

Wire

Switch Color

(degrees from fully closed position)

MS8120F; S2024-F (24 Vac models)

7°

85°

blue

less than 7

greater than 7

less than 85

1. Check damper position.

2. Connect 24 Vac to the red and black leadwires to drive

the damper to the open position. The actuator should

drive the damper.

3. If the actuator does not run, remove power for at least

two seconds.

yellow greater than 85

NOTE: Both sets of contacts are open when the actuator

is between 7° and 85°.

4. If the actuator spring returns, allow it to close entirely,

then return to step 2.

5. If the actuator does not spring return, verify that the

actuator is properly installed. See Installation section.

6. If the actuator is correctly installed but neither runs nor

spring returns, replace the actuator.

SPDT Switches (Fig. 12)

See Fig. 10 through 12 for SPDT auxiliary switch wiring.

7° SWITCH

85° SWITCH

MORE 85°

LESS 7°

MORE 7°

LESS 85°

BLACK/BLUE

BLACK/RED

GRAY/BLUE

GRAY/RED

BLACK/RED

GRAY/RED

BLACK/YELLOW

GRAY/YELLOW

M20679B

Fig. 12. SPDT auxiliary switch operation.

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F FAST-ACTING, TWO-POSITION ACTUATORS

D Montageanweisung

NL Installatievoorschrift

DK Installasjonsinstruks

N Installationsinstrukioner

SF Asennusohje

F Instructions d’Installation

I Istruzioni per I’Installazione

S Installations Instrukioner

E Instrucciones de montage

A1,

24 VAC

120 VAC

230 VAC

ASSEMBLY

EINBAU

MONTAGE

MONTAGGIO

NL MONTAGE

DK MONTERE

MONTERING

FIN ASENTAMINEN

MONTERA

MONTAJE

M20726A

M20727A

M12030

M20728A

10 mm

M20730B

M20729A

63-2584—10

MS4120F; MS4620F; MS8120F; S2024-F; S20230-F Fast-Acting,Two-Position Actuators