Honeywell MS8120F User's Manual

Honeywell Automobile Electronics User's Manual - MS8120F.
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PRODUCT DATA

63-2584—7

MS4120F; MS4620F,S; 

MS8120F,S; S2024-F; S20230-F 

Fast-Acting, Two-Position Actuators

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.

APPLICABLE LITERATURE

— Specification Data Sheet

63-2592

— Motor/Actuator Selection Guide 

for Damper Applications

63-8419

— Engineering Manual of Automatic Control

(also called The Gray Manual)

77-1100

— Direct Coupled Actuator 

Quick Selection Guide

63-8553

— Damper Torque Calculator

63-8437

FEATURES

• 175 lb-in. (20 N•m) 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.
• 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.
• Models available with integral high temperature (350°F) 

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

S2024-F, S20230-F, MS4620S, MS8120S
• Double-insulation rating.
• High-temperature, halogen-free, silicone-free 

leadwires.

• Models available with integral high temperature (350°F) 

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

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