Technical Data277182Power Supply24 VAC, ±20%, 50/60 Hz, 24 VDC, -10% / +20%Power Consumption Running3.5 WPower Consumption Holding2.5 WTransformer Sizing6 VA (class 2 power source)Electrical Connection(2) 3ft [1m], 18 GA appliance cables with 1/2” conduit connectorsOverload Protectionelectronic throughout 0° to 95° rotationOperating Range Y2 to 10 VDC, 4 to 20 mA w/ ZG-R01 (500 Ω, 1/4 W resistor)Feedback Output U2 to 10 VDCAngle of Rotation95°,Torque motorMin. 90 in-lbs [10 Nm]Direction of Rotation (Motor)reversible with built-in switchDirection of Rotation (Fail-Safe)reversible with CW/CCW mountingPosition Indicationvisual indicator, 0° to 95° (0° is full spring return position)Manual Override5 mm hex crank (3/16” Allen), suppliedRunning Time (Motor)95 secRunning Time (Fail-Safe)<20 sec @ -4°F to 122°F [-20°C to 50°C], <60 sec @ -49°F [-45°C]Ambient Humiditymax. 95% RH non-condensingAmbient Temperature Range-22°F to 122°F [-30°C to 50°C]Storage Temperature Range-40°F to 176°F [-40°C to 80°C]HousingNEMA 2, IP54, UL Enclosure Type 2Agency Listings†cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC and 2006/95/ECNoise Level (Motor)<50 dB (A) Noise Level (Fail-Safe)<62 dB (A) Servicingmaintenance freeQuality StandardISO 9001Weight4.4 lb [2 kg]Auxiliary switch2 x SPDT, 3A resistive (0.5A inductive) @ 250 VAC, one set at 10°, one adjustable 10° to 90°†Rated Impulse Voltage 800V, Type of Action 1.AA.B, Control Pollution Degree 3.NFB24-SR-S-X1Programmable Damper Actuator, Spring Return 24V800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA / CARIBBEANDate created, 11/30/2017 - Subject to change. © Belimo Aircontrols (USA), Inc.Wiring DiagramsINSTALLATION NOTESAActuators with appliance cables are numbered.Provide overload protection and disconnect as required.Actuators may also be powered by 24 VDC.Two built-in auxiliary switches (2x SPDT), for end position indication, interlock control, fan startup, etc.Only connect common to negative (-) leg of control circuits.A 500 Ω resistor (ZG-R01) converts the 4 to 20 mA control signal to 2 to 10 VDC.Actuators may be connected in parallel if not mechanically linked. Power consumption and input impedance must be observed.Apply only AC line voltage or only UL-Class 2 voltage to the terminals of auxiliary switches. Mixed or combined operation of line voltage/safety extra low voltage is not allowed.Meets cULus requirements without the need of an electrical ground connection.!WARNING! LIVE ELECTRICAL COMPONENTS!During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. Blk (1)Red (2)Wht (3)Org (5)24 VAC TransformerControl Signal (+)VDC/mA(–)Feedback Signal (+)2 to 10 VDC(–)500LineVoltsA13511Common+ HotY Input, 2 to 10 VU Output72 to 10 VDC / 4 to 20 mA Control 9041Auxiliary SwitchesNFB24-SR-S-X1Programmable Damper Actuator, Spring Return 24V800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA / CARIBBEANDate created, 11/30/2017 - Subject to change. © Belimo Aircontrols (USA), Inc.Next >