Technical Data 68744 Power Supply24 VAC, ±20%, 50/60 Hz Power consumption in operation12 W Power consumption in rest position 3 W Transformer sizing21 VA (class 2 power source) Electrical Connection18 GA plenum cable, 3 ft [1 m], with 1/2” conduit connector Overload Protectionelectronic throughout 0...95° rotation Input Impedance100 k Ω Position Feedback2...10 V, Max. 0.5 mA, VDC variable Angle of rotationMax. 95°, adjustable with mechanical stop Direction of motion motorselectable with switch 0/1 Direction of motion fail-safereversible with switch Position indicationMechanically, pluggable Manual overrideexternal push button Running Time (Motor)150 s constant, independent of load Running time fail-safe<35 s Bridging time2 s delay before fail-safe activates Pre-charging time5...20 s Ambient humiditymax. 95% r.H., non-condensing Ambient temperature-40...176°F [-40...80°C] Storage temperature-22...122°F [-30...50°C] Degree of ProtectionIP54, NEMA 2, UL Enclosure Type 2 Housing materialUL94-5VA Agency ListingcULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC and 2006/95/EC Noise level, motor52 dB(A) Noise level, fail-safe61 dB(A) Servicingmaintenance-free Quality StandardISO 9001 Weight4.4 lb [1.8 kg] †Rated Impulse Voltage 800V, Type of action 1.AA, Control Pollution Degree 3 GKRB24-3-5 Technical Data Sheet On/Off, Floating Point, Electronic Fail-Safe, 24 V 800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA / CARIBBEAN Date created, 12/04/2019 - Subject to change. © Belimo Aircontrols (USA), Inc.Wiring Diagrams INSTALLATION NOTES Provide overload protection and disconnect as required. Actuators may be connected in parallel. Power consumption and input impedance must be observed. Actuators may be connected in parallel if not mechanically linked. Power consumption and input impedance must be observed. 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. Y 2 Input 24 VAC Transformer (AC Only) Blk (1) - Common Red (2) + Hot Wht (3) Line Volts Y 1 Input Pnk (4) 111 On/Off 24 VAC Transformer (AC Only) Y 2 Input Blk (1) - Common Red (2) + Hot Wht (3) Y 1 Input Line Volts Pnk (4) 111 2 Floating Point GKRB24-3-5 Technical Data Sheet On/Off, Floating Point, Electronic Fail-Safe, 24 V 800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA / CARIBBEAN Date created, 12/04/2019 - Subject to change. © Belimo Aircontrols (USA), Inc.Next >