Overview Honeywell MS4620 actuator accepts two-position control with an integral junction box and accepts an on/off signal from a single-pole, single-throw controller. Reliability operates in smoke control systems requiring UL555S ratings up to 350F. Features 175 lb-in. (20 Nm) minimum driving torque at 350F (176C) Integral stainless steel spring return ensures return torque level Reversible mounting allows clockwise (cw) or counterclockwise (ccw) spring rotation Fifteen-second spring return timing No special cycing required and no audible noise during long-term holding Models available with integral high temperature (350 F) SPST position-indicating switches (<7 degrees, >85 degrees) Ninety-five degree angle of rotation for tight damper closure Actuator holds rated torque at reduced power level and die-case aluminum housing design allows flush mounting to damper Product Specifications ApplicationFire and SmokeDimensions (in.)10.67 in high x 3.94 in wide x 2.95 in deepDimensions (mm)271 mm high x 100 mm wide x 75 mm deepIncludesSelf-centering shaft adapter, 3mm crankWeight (lb)8 lbWeight (kg)3.63 kgMaterialsAluminum housingCommentsTwo integral 3/8 in. flexible conduit connectionsMountingDirect CoupledFrequency50 Hz; 60 HzApprovals, Underwriters Laboratories Inc.UL873, Plenum RatedElectrical ConnectionsTeflon-jacketed cableOperating Humidity Range (% RH)5 to 95% RH, non-condensingSupply Voltage230 Vac ±10%Power ConsumptionDriving-- 0.20A, 35W, Holding-- 0.14A, 10WShipping and Storage Temperature Range (F)-40 F to +140 FShipping and Storage Temperature Range (C)-40 C to +60 CApprovals, CE89/336/ECC, 73/23/EECApprovals, Canadian Underwriters Laboratories Inc.cUL C22.2 No. 24-93Ambient Temperature Range (F)-40 F to +130 FAmbient Temperature Range (C)-40 C to +55 CApprovals, C-TickN314Environmental, Electrical or Ingress Protection RatingNEMA 2; IP54Internal Auxiliary Switch0Maximum Noise RatingDriving (dB(A) @ 1m)-- 70; Holding (dB(A) @ 1m)-- 20 (no audible noise)Stroke95 ±3 degreesShaft Dimensions (in.)3/8 to 1.06 in. round or 3/8 to 11/16 in. squareActuator TypeDamperControl SignalTwo position; SPSTFail Safe ModeSpring ReturnTorque Rating (lb-in.)175 lb-in.Torque Rating (Nm)20 NmSpring Return Torque/Force (lb-in., lbf)175 lb-in.Spring Return Torque/Force (Nm, N)20 NmAdditional Torque Ratings (lb-in.)Maximum Stall-- 425 lb-in.; Minimum Driving at 350 F-- 175 lb-in.Additional Torque Ratings (Nm)Maximum Stall-- 48 Nm; Minimum Driving at 175 C-- 20 NmExternal Auxiliary Switches AvailableNoTiming, NominalDriving @ 60 Hz (sec)-- 15 secSpring Return TimingMaximum-- 15 secShaft Adapter TypeSelf-centering clampingManual operationManual crankShaft Dimensions (mm)10 to 27 mm round or 10 to 18 mm squareSpring Return DirectionBy orientationElectrical Connections (in.)40 in.Electrical Connections (mm)1 m