{"product_id":"woodward-9905-463-protech-gii-datasheet-technical-manual","title":"Woodward 9905-463 ProTech-GII Datasheet \u0026 Technical Manual","description":"\u003ch2\u003eWoodward 9905-463 ProTech-GII Series\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eWoodward 9905-463\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e9905-463\u003c\/strong\u003e Overspeed Protection Module, operates as a dedicated hardware component for high-integrity overspeed detection and safety shutdown execution within ProTech-GII network platforms.\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\u003e9905-463\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.59 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eNot specified (standard ProTech-GII chassis dimensions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC (18-32 VDC operating range; supports redundant inputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArchitecture\u003c\/td\u003e\n\u003ctd\u003eTriple Modular Redundant (TMR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoting Logic\u003c\/td\u003e\n\u003ctd\u003e2-out-of-3 (2oo3) Hardware-based Voting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Configuration\u003c\/td\u003e\n\u003ctd\u003eDe-Energize-to-Trip (DET) \/ Fail-Safe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 12 ms (Total response from detection to relay)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Inputs\u003c\/td\u003e\n\u003ctd\u003e3 Independent Magnetic Pickups (MPUs) or Proximity Probes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Outputs\u003c\/td\u003e\n\u003ctd\u003eRedundant Form-A and Form-C Safety Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication\u003c\/td\u003e\n\u003ctd\u003eModbus RTU (RS-485) and Modbus TCP (Ethernet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP20 Industrial Metal Enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Drives \u0026amp; Governors Properties\u003c\/h3\u003e\n\u003cp\u003eThe Woodward 9905-463 integrates specific thermal heat sink dissipation profiles across its three isolated hardware channels to maintain algorithmic processing stability under sustained monitoring loads. Designed for steam, gas, and hydro turbine safety loops, the module maintains an ultra-low latency actuator loop feedback response, forcing relay contact transitions within 12 ms of a verified velocity fault. The device runs deterministic hardware-based 2-out-of-3 (2oo3) voting logic, continuously comparing incoming pulse trains from independent passive or active speed sensors to intercept mechanical overspeed events before they exceed structural design parameters.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is input power handled to maintain uninterrupted overspeed protection?\u003c\/p\u003e\n\u003cp\u003eA: The hardware features terminals for redundant 24 VDC power inputs over an 18-32 VDC operating envelope. If one external supply line fails, the internal diode-OR auctioneering circuit switches seamlessly to the alternative supply rail without disturbing the internal speed processing logic or triggering a trip sequence.\u003c\/p\u003e\n\u003cp\u003eQ: What is the mechanical state of the safety relays during a total control power failure?\u003c\/p\u003e\n\u003cp\u003eA: The 9905-463 is hard-configured for De-Energize-to-Trip (DET) operation. Under standard operational run-states, the internal trip relays remain continuously energized; a total loss of power, an internal microprocessor fault, or a field circuit breakage drops the coil current instantly, executing a fail-safe mechanical trip.\u003c\/p\u003e\n\u003cp\u003eQ: Can this overspeed device transmit diagnostics to a centralized distributed control system?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the unit utilizes built-in Modbus RTU serial (RS-485) and Modbus TCP (Ethernet) communication paths. These links enable real-time streaming of channel-specific tracking data, peak hold values, sensor integrity metrics, and hardware fault registers to supervisory DCS and SCADA networks.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Orientation:\u003c\/strong\u003e Secure the IP20 industrial metal housing inside a clean, unventilated control bay using four rigid panel-mounting screws. Confirm that the enclosure base achieves solid metallic contact with the backplate to ensure a dependable chassis ground path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed Transducer Cable Layout:\u003c\/strong\u003e Install independent, twisted-shielded copper wires for each of the three speed inputs. Route these signal lines through dedicated steel conduits separated from high-voltage AC generator bars or inductive switching networks to isolate against cross-talk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain Wire Terminations:\u003c\/strong\u003e Terminate the speed sensor cable shields exclusively at the designated grounding bus inside the control panel frame. Do not connect the shields at the turbine sensor end to prevent high-frequency current loops from introducing signal jitter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Relay Contact Protection:\u003c\/strong\u003e Connect the Form-A and Form-C safety relays using appropriate conductor gauges mapped to the inductive load of the trip solenoid. Apply transient voltage suppression components directly across the external inductive devices to inhibit contact arcing during a shutdown event.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":42870827024474,"sku":"9905-463","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/184.1_18a9ed96-db36-44ff-8110-9403dc2ff645.jpg?v=1772761967","url":"https:\/\/www.spareoil.com\/products\/woodward-9905-463-protech-gii-datasheet-technical-manual","provider":"SpareOil Automation","version":"1.0","type":"link"}