{"product_id":"8406-003-woodward-overspeed-protection-display-module","title":"8406-003 Woodward Overspeed Protection Display Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWoodward 8406-003\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as the high-integrity processing module and operator interface for the ProTech-GII safety platform. This unit provides the essential Human-Machine Interface (HMI) for turbine overspeed detection, allowing operators to monitor real-time speed data and configure critical safety parameters locally. Designed for steam, gas, and hydro turbines, the 8406-003 maintains autonomous protection, ensuring an emergency trip executes even if the primary plant control system fails completely. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, providing the hardware-based voting and sub-12ms response times required for SIL-certified safety loops.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWoodward\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8406-003\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eProTech-GII\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDisplay Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDual High-Contrast Displays\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperator Input\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e9-Button Tactile Industrial Keypad\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSpeed Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3 Independent Channels (Passive, Active, or Hall-effect)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eVoting Logic\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIntegrated 2-out-of-3 (2oo3) Hardware Voting\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eResponse Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 12 ms (Total Hardware Trip Execution)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Power\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e18–32 VDC (Redundant Feeds Supported)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Relays\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRedundant Form-A and Form-C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eModbus RTU (RS-485) and Modbus TCP (Ethernet)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e–20 °C to +70 °C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSafety Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSIL-2 or SIL-3 Capable (System dependent)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHardware-Based 2oo3 Voting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 8406-003 incorporates internal 2-out-of-3 voting logic. This architecture ensures high availability by preventing nuisance trips from a single failed sensor while maintaining absolute safety by tripping if two sensors confirm an overspeed event.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-Low Latency Execution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module completes a full hardware trip in less than 12 milliseconds. This rapid response time protects high-inertia rotating assets from catastrophic mechanical failure during load rejection or governor malfunctions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAutonomous Protection Layer:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis interface operates independently of the Distributed Control System (DCS). Because the safety logic resides within the 8406-003 hardware, the turbine remains protected even during total network or PLC failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual High-Contrast Visualization:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe dual-display setup provides simultaneous viewing of active speed and trip setpoints. This redundancy in visualization allows technicians to verify safety parameters quickly without navigating through complex menu layers during critical operations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRedundant Power Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe unit accepts dual 18–32 VDC power feeds. This redundancy eliminates the power supply as a single point of failure, ensuring the safety system remains online during localized electrical faults.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1. What types of speed sensors can I connect to the 8406-003?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module supports up to three independent speed inputs. It features universal conditioning circuitry compatible with passive magnetic pickups (MPU), active proximity probes, and Hall-effect sensors, providing flexibility for various turbine manufacturer requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Is the 8406-003 suitable for outdoor or high-temperature cabinets?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The unit features an industrial panel-mount design with an operational temperature range of –20 °C to +70 °C. This makes it ideal for mounting in field-located enclosures or turbine decks where ambient temperatures can fluctuate significantly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. How does the module communicate with the plant SCADA or DCS?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 8406-003 includes dual communication interfaces: Modbus RTU via RS-485 and Modbus TCP via Ethernet. This allows for seamless remote monitoring of speed, status, and trip history while keeping the safety logic physically isolated from the control network.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Can this unit be used in a SIL-3 safety application?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 8406-003 is SIL-3 capable when utilized within a correctly designed ProTech-GII system architecture. The high-integrity 2oo3 voting and redundant relay outputs meet the rigorous reliability standards required for Safety Integrity Level 3.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":42870827778138,"sku":"8406-003","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/172.1_e785fc41-b7db-4517-959e-1964bb37f61c.jpg?v=1772509726","url":"https:\/\/www.spareoil.com\/products\/8406-003-woodward-overspeed-protection-display-module","provider":"SpareOil Automation","version":"1.0","type":"link"}