Models Available for Use with Two‑Position, Single Pole Single Throw (SPST), Line‑ (Series 40) or Low‑ (Series 80) Voltage Controls
Brush DC Submotor with Electronic Stall Protection for 2‑Position Models
Self‑Centering Shaft Adapter (Shaft Coupling) for Wide Range of Shaft Sizes
Metal Housing with Built‑In Mechanical End Limits
Manual Winding Capability with Locking Function
Spring Return Direction Field‑Selectable
All Models Are Plenum‑Rated Per UL873
Shaft Position Indicator and Scale
The MS8120F 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.
