{"product_id":"beckhoff-el3311-el-series-thermocouple-input-terminal","title":"BECKHOFF EL3311 Terminal d'Entrée Thermocouple Série EL","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eEL3311 (EL3311)\u003c\/strong\u003e is a specialized 1-channel analog input terminal from the Beckhoff EL series, engineered for high-precision temperature measurement using a wide range of standard thermocouples. Supporting types B, C, E, J, K, L, N, R, S, T, and U, this terminal offers the flexibility required for complex thermal monitoring in plastic processing, kiln control, and furnace management. By providing 16-bit resolution and integrated cold junction compensation, the EL3311 ensures high-accuracy data acquisition, effectively preventing process drift and enabling tighter control of critical thermal loops.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe hardware architecture of the EL3311 is optimized for the low-voltage, high-noise environments typical of industrial heating. It features a differential input stage that supports direct thermocouple connection or direct voltage measurements (±30, ±60, ±75 mV). The terminal is equipped with advanced diagnostic capabilities, including channel-specific wire break detection and adjustable firmware-based filtering. The EL3311 is fully isolated (500 V between E-bus and signal voltage), safeguarding the EtherCAT communication network from potential high-voltage interference originating from heating elements or external sensors.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eFeature\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\u003eEL3311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBECKHOFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Type\u003c\/td\u003e\n\u003ctd\u003eThermocouple (TC) or mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16 bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Time\u003c\/td\u003e\n\u003ctd\u003e75 ms (default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Filter\u003c\/td\u003e\n\u003ctd\u003e1 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12 mm x 100 mm x 68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the default thermocouple configuration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe EL3311 is factory-set to Type K. However, this can be easily adjusted via the TwinCAT software interface to any of the supported types (B, C, E, J, L, N, R, S, T, U) to match your specific field sensor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the EL3311 handle cold junction compensation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe terminal is equipped with an integrated cold junction sensor, allowing it to accurately compensate for temperature variations at the terminal wiring connection point. It also supports the connection of external cold junction sensors for high-precision laboratory or extreme-environment applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should I do if I see a signal error?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe EL3311 includes channel-by-channel wire break detection. If a measurement error is flagged, first check the physical integrity of the thermocouple wires and ensure the connections are secure within the spring-actuated terminals.\u003c\/p\u003e\n\u003ch3\u003eInstallation and Operational Recommendations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermocouple Wiring:\u003c\/strong\u003e Use appropriate thermocouple extension wire (compensating cable) to prevent secondary junction errors. Ensure the polarity is correct when connecting to the differential input, as reverse polarity will result in significant measurement deviation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding:\u003c\/strong\u003e Because thermocouple signals are in the microvolt range, use shielded twisted-pair cables. Ground the shield only at one end—preferably at the cabinet's grounding busbar—to avoid forming ground loops that can induce parasitic noise into the measurement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Filtering:\u003c\/strong\u003e The EL3311 allows for adjustable firmware-based filtering. For applications involving high electrical noise (e.g., near large AC motors or variable frequency drives), increasing the filter time will provide more stable readings at the cost of slower response times.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106602049899,"sku":"EL3311","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/el3311-zpox2xodjq1.png?v=1776244466","url":"https:\/\/www.plcprotech.com\/fr\/products\/beckhoff-el3311-el-series-thermocouple-input-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}