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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).