{"product_id":"allen-bradley-2085-ecr-micro800-expansion-bus-terminator-end-cap","title":"Allen Bradley 2085-ECR Micro800 Expansion Bus Terminator End Cap","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Allen Bradley 2085-ECR serves as the mandatory bus terminator for the Micro800 expansion I\/O system. This end cap secures the right-hand side of the final expansion module in a Micro850 or Micro870 controller assembly. It completes the serial communication backplane circuit, ensuring signal integrity across all connected I\/O modules. Without the 2085-ECR, the controller cannot establish a stable communication link with the expansion rack, leading to bus errors and system downtime. It functions as both an electrical terminator and a physical protective cover for the open bus interface.\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\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetailed Specification\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\u003eAllen Bradley \/ Rockwell Automation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2085-ECR\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMicro800 Series\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCompatible Controllers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMicro850, Micro870\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSerial Communication Bus Termination\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5V DC, 10 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP20\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20°C to 65°C (-4°F to 149°F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eHazardous Location Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eClass I, Div 2, Groups A, B, C, D\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.00 lbs (1.36 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100% Brand New Original\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\u003eSignal Integrity Optimization:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 2085-ECR eliminates signal reflections on the high-speed serial bus. By providing the correct impedance matching at the end of the line, it prevents data corruption and ensures synchronized I\/O updates between the processor and expansion modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHazardous Environment Compliance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis terminator carries full certification for Class I, Division 2 (Groups A, B, C, and D) hazardous locations. This allows engineers to deploy Micro800 systems in oil and gas applications or chemical processing zones where explosive gases might exist.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRugged Physical Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBeyond its electrical function, the 2085-ECR protects the delicate backplane pins from dust, moisture, and accidental contact. The IP20-rated enclosure prevents debris from shorting out the 5V DC logic power distributed across the expansion bus.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWide Thermal Envelope:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReliable operation from -20°C to 65°C supports installation in unheated outdoor enclosures or high-temperature engine rooms. The unit maintains electrical termination constants regardless of thermal fluctuations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Hardware Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe \"End Cap\" design allows for tool-free installation. It snaps directly onto the last module in the rack, completing the mechanical and electrical assembly of the PLC system in seconds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 2085-ECR supplied as 100% Brand New?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We supply this 2085-ECR bus terminator in 100% Brand New, original factory condition. Every unit ships in original Allen Bradley packaging to ensure the pins and housing remain pristine for your installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan the system operate without the 2085-ECR installed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The Micro850 and Micro870 controllers require the 2085-ECR to detect the end of the expansion rack. If the terminator is missing, the controller will typically report a \"Bus Fault\" and fail to recognize any attached 2085 expansion I\/O modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this terminator require any software configuration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 2085-ECR is a passive electrical component. You do not need to configure it in Connected Components Workbench (CCW) software; however, the software assumes a properly terminated bus for the I\/O configuration to validate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhere exactly should I install the 2085-ECR?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAlways install the 2085-ECR on the right side of the very last expansion I\/O module in your hardware stack. If you are not using any expansion modules, the terminator is not required, as the controller’s base unit handles its own internal termination.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53459763101880,"sku":"2085-ECR","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/2085-ECR.jpg?v=1778657871","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-2085-ecr-micro800-expansion-bus-terminator-end-cap","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}