{"product_id":"el1004-beckhoff-4-channel-digital-input-terminal-24-vdc","title":"EL1004 BECKHOFF 4-Channel Digital Input Terminal 24 VDC","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1004 (EL1004)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance 4-channel digital input terminal designed for the EtherCAT I\/O system. Engineered to interface seamlessly with various field sensors—including proximity switches, limit switches, and pressure sensors—the EL1004 converts binary 24 VDC control signals into a digital format for the EtherCAT master. Compliant with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEN 61131-2 Type 1\/3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003especifications, this module is a staple in B2B industrial automation sectors like high-speed packaging, automotive assembly, and material handling. Its\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2-wire connection technology\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eallows for direct wiring of sensors with a common ground, significantly reducing wiring complexity and cabinet space requirements.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration (Deep Dive)\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1004\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eutilizes the high-speed E-bus communication backplane to provide real-time status updates to the controller. The inputs are designed with a hardware filter to suppress electrical noise and contact bounce, ensuring signal integrity in electromagnetically noisy environments.\u003c\/p\u003e\n\u003cp\u003eAs a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eType 1\/3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einput, the module is optimized for both traditional mechanical switches (Type 1) and modern electronic sensors (Type 3) that require higher current sinking capability to maintain a stable \"ON\" state. The module features integrated signal LEDs for each channel, providing immediate visual diagnostics for field-side troubleshooting. With its ultra-slim\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e12 mm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(approx. 1.5 cm including locking tabs) profile, the EL1004 offers an excellent density-to-footprint ratio for modern control cabinets.\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\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\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\u003e\u003cstrong\u003eEL1004\u003c\/strong\u003e\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\u003e\u003cstrong\u003eBECKHOFF\u003c\/strong\u003e\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 Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConnection Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2-wire\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEN 61131-2, Type 1\/3\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 VDC (-15 % \/ +20 %)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Filter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTypically 3.0 ms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e“0” Signal Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-3 to +5 V (EN 61131-2, Type 3)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e“1” Signal Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e11 to 30 V (EN 61131-2, Type 3)\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\u003eTypically 90 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\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\u003e-25 to +60 Celsius\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProtection 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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between 1-wire and 2-wire connection technology in the EL1004?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2-wire technology\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein the EL1004 allows you to connect the signal wire and the return (ground) wire directly to the terminal for each channel. This is particularly useful for sensors that do not share a common ground at the mounting point, ensuring a clear reference potential for each input.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the EL1004 be used with NPN sensors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe EL1004 is designed as a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esinking\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einput (Positive switching), meaning it expects a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePNP\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esensor that switches the +24 VDC signal to the input pin. For NPN applications, a different terminal model or an interposing relay would be required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I identify a faulty channel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe terminal features\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003estatus LEDs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor each of the 4 channels. If a 24 VDC signal is present at the input but the corresponding LED does not illuminate, it indicates a hardware fault or a lack of power to the field-side power contacts.\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\u003eField Power Contacts:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe EL1004 draws its field power from the internal power contacts. Ensure that a power feed terminal (such as an EK1100 or EL9100) is placed upstream to provide the necessary 24 VDC to the terminal segment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Practice:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse standard industrial-grade 0.08 to 2.5 mm² wire. For high-vibration applications, utilize ferrules to prevent wire fraying and ensure a gas-tight connection within the spring-clamp terminal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEMC Shielding:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhile the module complies with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEN 61000-6-2\u003c\/strong\u003e, always route sensor cables away from high-power AC lines to prevent capacitive coupling and \"ghost\" signals on the digital inputs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEL1004\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003estands out for its reliability and compliance with global standards. By adhering to the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEN 61131-2 Type 3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003estandard, it provides a more robust input characteristic that is less susceptible to leakage currents from electronic sensors compared to older Type 2 inputs. Its rugged polycarbonate housing and vibration resistance (conforming to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEN 60068-2-6\u003c\/strong\u003e) make it ideal for mounting directly on machinery. The seamless integration into the TwinCAT software environment allows for instant \"Scan and Connect\" functionality, reducing commissioning time for B2B engineering projects.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106701795691,"sku":"EL1004","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/el1004-lysqsktxig0.png?v=1776244375","url":"https:\/\/www.plcprotech.com\/products\/el1004-beckhoff-4-channel-digital-input-terminal-24-vdc","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}