{"product_id":"ge-is220ppras1a-emergency-turbine-protection-terminal-board","title":"GE IS220PPRAS1A Emergency Turbine Protection Terminal Board","description":"\u003ch2\u003eGE IS220PPRAS1A Emergency Turbine Protection Terminal Board\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE IS220PPRAS1A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eIS220PPRAS1A\u003c\/strong\u003e terminal board, serves as the primary hardware interface for backup Overspeed protection within Mark VIe turbine‑protection platforms. It supports PPRA I\/O‑pack mounting, six‑speed signal routing, isolated trip‑contact handling, and Ethernet‑based IONet communication for independent watchdog functionality.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eIS220PPRAS1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eGE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e8.26 cm × 4.19 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003e-30 to 65 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCore Performance Indicators\u003c\/th\u003e\n\u003ctd\u003ePPRA‑only terminal board; supports three PPRA packs; WREA option‑board interface; six‑speed input routing; isolated trip‑contact watchdog; Ethernet IONet communication; surface‑mount construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eTriple Modular Redundancy (TMR) 2oo3 Architecture\u003c\/h3\u003e\n\u003cp\u003eWithin Mark VIe protection architectures, the PPRAS1A terminal board aligns with TMR Overspeed‑protection behavior by supporting three PPRA I\/O packs mounted directly to the TREA board. Its fixed routing paths maintain deterministic propagation intervals for speed‑pair inputs and backup‑trip relay activation. Galvanic isolation between trip‑contact channels ensures stable operation under primary‑control failure conditions. Firmware flash compatibility resides at the PPRA pack level; the terminal board itself contains no programmable logic.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the IS220PPRAS1A operate with a single PPRA pack?\u003c\/strong\u003e A: No. Proper operation requires three PPRA I\/O packs installed on a TREA board with a WREA option board.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the board support Ethernet redundancy?\u003c\/strong\u003e A: PPRA packs provide dual 10\/100 Ethernet ports; the terminal board itself is passive and selects appropriate operation based on PPRA logic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the board behave during primary‑control failure?\u003c\/strong\u003e A: Backup trip relays on the TREA board activate independently of primary control, driven by PPRA hardware‑implemented Overspeed logic.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the TREA terminal board securely before attaching PPRA packs.\u003c\/li\u003e\n\u003cli\u003eAlign threaded PPRA posts with bracket holes to ensure proper DC‑62 connector engagement.\u003c\/li\u003e\n\u003cli\u003eTighten mounting‑bracket hardware once; repeated adjustments are not required.\u003c\/li\u003e\n\u003cli\u003eRoute Ethernet cables without sharp bends; PPRA selects appropriate port automatically.\u003c\/li\u003e\n\u003cli\u003eVerify power‑connector seating before energizing; PPRA packs include soft‑start current limiting.\u003c\/li\u003e\n\u003cli\u003eConfigure PPRA parameters using ToolboxST after installation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":48161076084926,"sku":"IS220PPRAS1A","price":560.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/general-electric-is220ppdah1a-feedback-i-o-pack-gwqwnibflqs.png?v=1759044611","url":"https:\/\/www.autooiltech.com\/ar\/products\/ge-is220ppras1a-emergency-turbine-protection-terminal-board","provider":"AutoOilTech Limited","version":"1.0","type":"link"}