{"product_id":"beckhoff-el1054-4-channel-namur-digital-input-terminal","title":"BECKHOFF EL1054 Terminal d'entrée numérique NAMUR 4 canaux","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1054 (EL1054)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a specialized 4-channel digital input terminal designed to interface with NAMUR sensors in accordance with IEC 60947-5-6. This terminal is a critical component for process automation and hazardous area applications, providing high-reliability signal acquisition from proximity switches and encoders. Unlike standard digital inputs, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1054\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a switching amplifier, monitoring current levels to distinguish between signal states while simultaneously performing continuous line diagnostics. It is widely utilized in oil and gas refineries, chemical processing plants, and grain silos where the detection of cable breaks or short circuits is essential for functional safety and preventing unplanned downtime in explosive atmospheres.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe hardware architecture of the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1054\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis optimized for 2-wire NAMUR technology, providing an open-circuit voltage of approximately 8.2 VDC. The terminal interprets a current of ≤ 1.2 mA as a \"0\" signal and ≥ 2.1 mA as a \"1\" signal, with a built-in 350 microampere hysteresis to prevent signal chatter. A major technical advantage of this module is its integrated fault detection: it can trigger a diagnostic alarm if the current drops below 200 microamperes (indicating a cable break) or exceeds 7.0 mA (indicating a short circuit). With a maximum switching frequency of 5 kHz, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1054\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis capable of high-speed pulse counting and rotation monitoring. The unit is fully certified for ATEX, IECEx, and cFMus Zone 2\/Division 2 environments, featuring 500 V electrical isolation to protect the EtherCAT E-bus from field-side transients.\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\u003eSpecification\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\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEL1054\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBECKHOFF\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGermany\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTechnology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNAMUR (IEC 60947-5-6)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSignal Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBinary current input\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax. Switching Frequency\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 kHz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCable Break Detection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eI \u0026lt;= 200 microamperes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eShort Circuit Detection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eI \u0026gt;= 7.0 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Consumption (E-bus)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003etyp. 50 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eElectrical Isolation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e500 V (E-bus \/ field potential)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCE, UL, ATEX, IECEx, cFMus\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDimensions (W x H x D)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12 mm x 100 mm x 68 mm\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\u003e0 to +55 Celsius\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary advantage of using NAMUR sensors with the EL1054?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNAMUR technology allows for \"live-zero\" monitoring. Because the sensor always draws a small amount of current even in the \"OFF\" state, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1054\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecan instantly distinguish between a valid \"0\" signal and a disconnected or broken wire, significantly increasing system safety.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this terminal provide intrinsic safety (Ex i)?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1054\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis an \"Ex nA\" or \"Ex ec\" (non-sparking\/increased safety) device intended for installation in Zone 2. While it interfaces with NAMUR sensors, it does not contain the galvanic isolation barriers required for \"Ex i\" intrinsic safety. If sensors are located in Zone 0 or 1, an additional safety barrier may be required depending on your local regulations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the EL1054 be used for standard dry contact switches?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile possible, it is not recommended without a specific resistor network. NAMUR inputs expect specific impedance levels. Connecting a simple dry contact would result in a \"Short Circuit\" error when closed and a \"Cable Break\" error when open.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiagnostic Mapping:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIn the TwinCAT System Manager, ensure you map the \"Error\" and \"Diagnosis\" bits for each channel. These bits provide real-time feedback on the health of your field wiring, allowing the PLC to execute a safe state routine immediately upon detecting a short circuit or line break.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHazardous Area Compliance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhen installing in ATEX\/IECEx Zone 2, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1054\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emust be mounted in an enclosure that provides a minimum protection rating of IP54. Ensure all wiring adheres to the requirements for \"Ex n\" or \"Ex ec\" installation, including proper cable glandular and strain relief.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Signal Integrity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSince the terminal supports up to 5 kHz, signal cable length and capacitance become factors. For high-frequency pulse acquisition, use shielded twisted-pair (STP) cabling and ensure the shield is grounded at the entry point of the control cabinet to prevent EMI from causing false switching or diagnostic errors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Precision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse the 2-wire connection technology with ferrules for stranded wires to ensure a gas-tight, vibration-proof connection. The stripping length must be exactly 8–9 mm to ensure proper engagement with the spring-actuated terminal without exposing live copper.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106672468331,"sku":"EL1054","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/el1054-unjmgxocatn.png?v=1776244377","url":"https:\/\/www.plcprotech.com\/fr\/products\/beckhoff-el1054-4-channel-namur-digital-input-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}