General
Honeywell MS4104, MS4109, MS4604, MS4609, MS8104 and MS8109 Fast-Acting, Two-Position Actuators are spring return direct coupled actuators (DCA) for Fire and Smoke dampers (on/off 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.
Features
- 30 lb-in. (3.4 Nm) or 80 lb-in. (9 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.
- 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.
- 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.
- Designed to operate reliably in smoke control systems requiring Underwriter’s Laboratories Inc. UL555S ratings up to 350°F.
- Non-UL marked models available.
- Models available with SPST position-indicating switches (7°, 85° stroke).
Specifications
- Make: Honeywell
- Model: MS8120F1002
- Torque: 20 NM
- Nominal Supply Voltage: 24VAC
- Control Signal: Two Position (On/Off)
- Auxiliary Switches: No
- Nominal Timing: 15 s
- Rotational Stroke (Deg): 95
- Mounting: Direct Coupled
- Shaft Size: Round 0.5 "
- IP Rating: IP40
- Temperature Range: -40-140 °F
- Shaft Adapter Type: Aluminum Hub, 2 Set Screws
- Electrical Connections: Wire Leads
- Approvals: UL
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