{"product_id":"emerson-2840a18g02-relay-output-cards","title":"Emerson 2840A18G02 Relay Output Cards","description":"\u003cp\u003eThe \u003cstrong\u003eEmerson 2840A18G02\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e2840A18G02\u003c\/strong\u003e Relay Output Card, operates as a dedicated hardware component for high-voltage discrete actuator switching within Ovation DCS Series QRO backplane structures.\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\u003e2840A18G02\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eEmerson \/ Westinghouse\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\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eRelay Output Card (Series QRO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArchitecture\u003c\/td\u003e\n\u003ctd\u003eOvation DCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e250 VAC \/ 330 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostics\u003c\/td\u003e\n\u003ctd\u003eChannel LED Status Indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.20 lbs (0.54 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Ovation Rack Card Form Factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e3.5 W at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eGalvanic Isolation \u0026amp; Signal Loop Processing\u003c\/h3\u003e\n\u003cp\u003eDesigned for high-voltage discrete execution, the module features high-grade galvanic isolation to segregate internal backplane logic from field switching inductive spikes and line transients. Embedded LED status indicators deliver real-time visual feedback for each relay coil drive state. Built-in contact snubber networks suppress arc discharge across dry and wet relay interfaces during continuous high-voltage AC and DC switching loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 2840A18G02 module be removed under power while high-voltage field loads are active?\u003c\/p\u003e\n\u003cp\u003eA: Field power supplies feeding the relay contact terminals must be isolated prior to board removal to prevent electrical arcing across terminal contacts and maintain operator safety.\u003c\/p\u003e\n\u003cp\u003eQ: What indicates active output execution on the front faceplate of the 2840A18G02?\u003c\/p\u003e\n\u003cp\u003eA: Individual LED status indicators illuminate directly on the module faceplate when the controller logic energizes the corresponding channel relay driver circuit.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003ePower down the Ovation chassis backplane and disconnect external 250 VAC \/ 330 VDC field contact supplies before installing the module.\u003c\/li\u003e\n\u003cli\u003eMaintain strict ESD protection protocols, including a grounded wrist strap, when handling the printed circuit board assembly.\u003c\/li\u003e\n\u003cli\u003eSlide the card edge along the slot alignment tracks and seat the backplane multi-pin connector smoothly into the socket.\u003c\/li\u003e\n\u003cli\u003eFasten top and bottom faceplate retention screws to ensure chassis earth ground continuity and vibration resistance.\u003c\/li\u003e\n\u003cli\u003eRoute high-voltage AC\/DC output contact wiring separately from low-level analog or communication cables, maintaining at least 300 mm clearance.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Emerson","offers":[{"title":"Default Title","offer_id":66735223898227,"sku":"2840A18G02","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/2840A18G02_Cocoai_bda3124e-a823-46fc-bec6-d778b48b54f3.jpg?v=1790662590","url":"https:\/\/www.dcssupplier.com\/products\/emerson-2840a18g02-relay-output-cards","provider":"DcsSupplier Limited","version":"1.0","type":"link"}