{"product_id":"8237-1247-woodward-protech-gii-overspeed-protection-system","title":"8237-1247 Woodward  ProTech-GII Overspeed Protection System","description":"\u003cp\u003eThe \u003cstrong\u003eWoodward 8237-1247\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e8237-1247\u003c\/strong\u003e Overspeed Protection System, operates as a dedicated hardware component for turbine rotational monitoring and trip shutdown execution within ProTech-GII safety 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\u003e8237-1247\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\u003e26 lbs (11.79 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e330 mm x 486 mm x 153 mm\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 (-4 to +140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e30 W per module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eProTech-GII Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eBulkhead \/ Panel mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Input Power\u003c\/td\u003e\n\u003ctd\u003e100 to 150 VDC @ 30 W per module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Input Power\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterrupt Time\u003c\/td\u003e\n\u003ctd\u003e3 ms (single power supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Inputs\u003c\/td\u003e\n\u003ctd\u003e3 x MPU (100 to 32,000 Hz, 1 to 35 Vrms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Outputs\u003c\/td\u003e\n\u003ctd\u003e3 x 4-20 mA (speed readout)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Relays\u003c\/td\u003e\n\u003ctd\u003e2 x 2-out-of-3 voted shutdown relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm Relays\u003c\/td\u003e\n\u003ctd\u003e3 x individual alarm relays (2 A @ 24 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003e3 x RS-232\/422\/485 Modbus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Interface\u003c\/td\u003e\n\u003ctd\u003e45-key keypad per module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eIP56\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; Speed Control Stability\u003c\/h3\u003e\n\u003cp\u003eInternal electronic voting circuits and power distribution channels generate operational thermal loads managed through direct convection across the bulkhead chassis. Efficient thermal heat sink dissipation ensures stable component performance during continuous operation in high-temperature turbine environments up to +60 deg C. The triple modular redundancy architecture processes magnetic pickup signals with a rapid 3 ms interrupt execution time, maintaining precise actuator loop feedback response to suppress trip delays during overacceleration events.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQ: How does the 2-out-of-3 voting architecture maintain system availability during a channel fault?\u003c\/li\u003e\n\u003cli\u003eA: The triple modular redundancy structure evaluates inputs across three independent processing modules; a failure or trip command on a single module generates an alarm without triggering a false system shutdown unless a second module concurs.\u003c\/li\u003e\n\u003cli\u003eQ: What cable grounding practices apply to the magnetic pickup (MPU) speed sensor inputs?\u003c\/li\u003e\n\u003cli\u003eA: MPU input connections must use twisted-pair shielded cabling, with the cable shield grounded strictly at a single terminal point on the main chassis ground to avoid induced electrical noise on the 100 to 32,000 Hz signal loop.\u003c\/li\u003e\n\u003cli\u003eQ: What enclosure sealing measures ensure IP56 protection during field installation?\u003c\/li\u003e\n\u003cli\u003eA: Cable penetration points must be sealed using properly sized IP56-rated cable glands, and the front access door latches must be fully secured against panel gasket surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the unit vertically against a flat bulkhead surface using all mounting points to withstand mechanical turbine vibration.\u003c\/li\u003e\n\u003cli\u003eConnect high-voltage DC power feeds (100 to 150 VDC) through dedicated fused disconnects, ensuring correct power terminal polarity prior to energizing.\u003c\/li\u003e\n\u003cli\u003eRoute speed sensor cables, communication lines, and trip relay wiring in separate grounded conduit runs to prevent electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eVerify that the primary chassis earth lug is connected directly to the plant grounding grid using a heavy low-impedance ground strap.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":50738611486972,"sku":"8237-1247","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/8237-1247.jpg?v=1785376955","url":"https:\/\/www.electronicplc.com\/products\/8237-1247-woodward-protech-gii-overspeed-protection-system","provider":"Electronic PLC","version":"1.0","type":"link"}