{"product_id":"digital-load-sharing-and-speed-control-module-woodward-9905-377","title":"Digital Load Sharing and Speed Control Module Woodward 9905-377","description":"\u003cp\u003eThe \u003cstrong\u003eWoodward 9905-377\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e9905-377\u003c\/strong\u003e Speed Control Module, operates as a dedicated hardware component for prime mover governing and generator power balancing within industrial power management systems.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e9905-377\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWoodward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.08 lbs (1.85 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e160 mm x 120 mm x 90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-55 to +125 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e90 to 240 VAC or 20 to 40 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e0 to 10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.1 percent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Resolution\u003c\/td\u003e\n\u003ctd\u003e12-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Isolation\u003c\/td\u003e\n\u003ctd\u003e1500 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eRS-485, Modbus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Frequency Range\u003c\/td\u003e\n\u003ctd\u003e10 Hz to 5 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ NEMA 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eThermal Heat Sink Dissipation \u0026amp; Actuator Loop Feedback\u003c\/h3\u003e\n\u003cp\u003eDual AC\/DC internal power supplies and output driver electronics generate thermal energy transferred through the IP65\/NEMA 4 sealed enclosure. Efficient thermal heat sink dissipation supports continuous operation across harsh thermal environments ranging from -40 to +85 deg C. High-resolution 12-bit processing combined with 1500 VDC signal isolation ensures stable actuator loop feedback response, delivering precise 0-10 VDC bias commands for transient speed correction and equal real-power load distribution.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQ: How should RS-485 serial communication cabling be installed to ensure Modbus network reliability?\u003c\/li\u003e\n\u003cli\u003eA: Modbus communications require shielded twisted-pair wire terminated with 120 ohm resistors at both ends of the RS-485 network line to prevent signal reflection.\u003c\/li\u003e\n\u003cli\u003eQ: What flexibility does the dual power supply specification offer during installation?\u003c\/li\u003e\n\u003cli\u003eA: The internal power architecture accepts broad AC inputs (90 to 240 VAC) or low-voltage DC inputs (20 to 40 VDC), accommodating standard station battery banks or plant AC distribution lines.\u003c\/li\u003e\n\u003cli\u003eQ: How does 1500 VDC isolation protect control logic from field wiring disturbances?\u003c\/li\u003e\n\u003cli\u003eA: High-voltage galvanic barriers isolate internal microprocessor logic from field inputs and ground loops, preventing common-mode voltage spikes from degrading signal accuracy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSecure the IP65\/NEMA 4 housing to a solid, vibration-damped mounting surface using all designated mounting points.\u003c\/li\u003e\n\u003cli\u003eRoute speed sensing input cables and analog output wiring in grounded metal conduits physically isolated from high-current power cables.\u003c\/li\u003e\n\u003cli\u003eConnect the module frame earth lug directly to the local station ground bus using a short, heavy-gauge conductor.\u003c\/li\u003e\n\u003cli\u003eVerify power supply selection and voltage levels before tightening terminal block connections and energizing the system.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":50738728173820,"sku":"9905-377","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/9905-3772.jpg?v=1785376955","url":"https:\/\/www.electronicplc.com\/products\/digital-load-sharing-and-speed-control-module-woodward-9905-377","provider":"Electronic PLC","version":"1.0","type":"link"}