{"product_id":"thorn-grinnell-mp-500-main-processor-board-circuit-board","title":"Thorn Grinnell MP-500 Main Processor Board Circuit Board","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"18\" data-end=\"697\"\u003eThe Thorn Grinnell MP-500 Main Processor Board Circuit Board is used in addressable fire alarm control systems to provide central processing, system supervision, and \u003ca href=\"https:\/\/plgautomation.com\/collections\/networking-communication\"\u003ecommunication\u003c\/a\u003e for all fire alarm detection, notification, and control functions. Commonly installed in Thorn Grinnell Autocall TFX-500, TFX-500M, TFX-800, and TFX-800M fire alarm control panels protecting commercial buildings, hospitals, schools, industrial facilities, and institutional life safety systems. Fire alarm technicians and \u003ca href=\"https:\/\/plgautomation.com\/collections\/hmi-operator-interfaces\"\u003esystem integrators\u003c\/a\u003e use this main processor board for controller repairs, preventive maintenance, system upgrades, and replacement of failed processor modules. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"699\" data-end=\"716\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"718\" data-end=\"1240\"\u003eThe Thorn Grinnell MP-500 Main Processor Board Circuit Board functions as the primary signal processing unit within compatible TFX fire alarm control panels, receiving alarm, supervisory, and trouble signals from addressable devices while controlling notification appliances, relay outputs, communication interfaces, and remote annunciators. It is widely used in commercial and industrial fire detection systems where continuous system monitoring, event processing, and life safety control are required. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1242\" data-end=\"1271\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1273\" data-end=\"2136\"\u003e• Brand: Thorn Grinnell \/ Autocall\u003cbr data-start=\"1307\" data-end=\"1310\"\u003e• Model: MP-500 Main Processor Board\u003cbr data-start=\"1346\" data-end=\"1349\"\u003e• PCB Number: 940500\u003cbr data-start=\"1369\" data-end=\"1372\"\u003e• Product Type: Main Processor Circuit Board\u003cbr data-start=\"1416\" data-end=\"1419\"\u003e• Order Part Number (TFX-500): 976037\u003cbr data-start=\"1456\" data-end=\"1459\"\u003e• Order Part Number (TFX-800): 976099\u003cbr data-start=\"1496\" data-end=\"1499\"\u003e• Function: Central Fire Alarm Signal Processing and System Control\u003cbr data-start=\"1566\" data-end=\"1569\"\u003e• Compatible Systems: Autocall TFX-500, TFX-500M, TFX-800, TFX-800M\u003cbr data-start=\"1636\" data-end=\"1639\"\u003e• Input Voltage: 24 VDC\u003cbr data-start=\"1662\" data-end=\"1665\"\u003e• Output Voltages: +5 VDC, +12 VDC, +26 VDC\u003cbr data-start=\"1708\" data-end=\"1711\"\u003e• Communication Interfaces: Local Bus, Remote Bus (RS-485), Remote Network Interface\u003cbr data-start=\"1795\" data-end=\"1798\"\u003e• EEPROM: Site-Programmable Configuration EEPROM\u003cbr data-start=\"1846\" data-end=\"1849\"\u003e• Relay Outputs: Alarm and Fault Relay Contacts\u003cbr data-start=\"1896\" data-end=\"1899\"\u003e• Mounting Position: Main Processor Board Position (B1\/BP1)\u003cbr data-start=\"1958\" data-end=\"1961\"\u003e• Application: Addressable Fire Alarm Control Panel\u003cbr data-start=\"2012\" data-end=\"2015\"\u003e• OEM Fire Alarm System Component\u003cbr data-start=\"2048\" data-end=\"2051\"\u003e• Designed for Continuous Life Safety Operation \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2138\" data-end=\"2162\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2164\" data-end=\"2330\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Thorn MP-500 Main Processor Board 976037\u003cbr data-start=\"2206\" data-end=\"2209\"\u003e• Thorn MP-500 Main Processor Board 976099\u003cbr data-start=\"2251\" data-end=\"2254\"\u003e• Thorn 940500 MP Main Processor Board\u003c\/p\u003e","brand":"Thorn","offers":[{"title":"New","offer_id":51714021687598,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_46b9f6e3-e707-4305-a477-b8f4f7503693.jpg?v=1770414029","url":"https:\/\/plgautomation.com\/products\/thorn-grinnell-mp-500-main-processor-board-circuit-board","provider":"PLG Automation ","version":"1.0","type":"link"}