{"product_id":"beckhoff-el4028-ethercat-terminal","title":"BECKHOFF EL4028 EtherCAT Terminal","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe BECKHOFF EL4028 is an 8-channel analog output EtherCAT terminal designed to generate current signals within the 4 to 20 mA range with a 12-bit resolution. As part of the modular EL-series system, this terminal combines high channel density with a compact 12 mm housing width, enabling efficient space utilization in electrical control cabinets.\u003c\/p\u003e\n\u003cp\u003eThe EL4028 utilizes 1-wire connection technology for single-ended signals, connecting directly to field actuators, control valves, and analytical instruments. The terminal features electrical isolation between the internal E-bus circuitry and the field-side signal voltage to ensure signal integrity and protect sensitive processing components.\u003c\/p\u003e\n\u003cp\u003eEquipped with Distributed Clocks (DC) support, the terminal enables precise synchronization with other EtherCAT devices, achieving synchronization accuracy of less than 1 microsecond. Additionally, an optional watchdog timer can be configured to drive the outputs to user-specific safe values using a custom ramp during communication interruptions.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEight independent analog output channels in a 12 mm terminal housing.\u003c\/li\u003e\n  \u003cli\u003eStandard 4 to 20 mA current loop output signal interface.\u003c\/li\u003e\n  \u003cli\u003e12-bit signal conversion resolution.\u003c\/li\u003e\n  \u003cli\u003e1-wire connection technology for simplified, single-ended wiring.\u003c\/li\u003e\n  \u003cli\u003eSupport for Distributed Clocks (DC) to ensure highly precise synchronization.\u003c\/li\u003e\n  \u003cli\u003eConfigurable watchdog safety function with user-defined ramp values.\u003c\/li\u003e\n  \u003cli\u003eElectrical isolation of 500 V between the E-bus and the output signals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eControl of analog current-loop actuators and proportional valves.\u003c\/li\u003e\n  \u003cli\u003eIntegration with variable speed drives and positioning systems.\u003c\/li\u003e\n  \u003cli\u003eProcess control instrumentation interface in automated machinery.\u003c\/li\u003e\n  \u003cli\u003eDistributed analog output subsystems in EtherCAT network topologies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n\u003ch4\u003eGeneral Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eParameter\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eManufacturer\u003c\/td\u003e\n      \u003ctd\u003eBECKHOFF\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eModel\u003c\/td\u003e\n      \u003ctd\u003eEL4028\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eEtherCAT Terminal\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Channels\u003c\/td\u003e\n      \u003ctd\u003e8\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eConnection Technology\u003c\/td\u003e\n      \u003ctd\u003e1-wire, single-ended\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDesign Form\u003c\/td\u003e\n      \u003ctd\u003eCompact terminal housing with signal LEDs\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003ePolycarbonate\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDimensions (W x H x D)\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\u003eWeight\u003c\/td\u003e\n      \u003ctd\u003eApprox. 60 g\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eElectrical and Signal Data\u003c\/h4\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eParameter\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSignal Current\u003c\/td\u003e\n      \u003ctd\u003e4 to 20 mA\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eResolution\u003c\/td\u003e\n      \u003ctd\u003e12 bit\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eConversion Time\u003c\/td\u003e\n      \u003ctd\u003eApprox. 400 us\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLoad Impedance\u003c\/td\u003e\n      \u003ctd\u003eLess than 150 Ohm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOutput Error\u003c\/td\u003e\n      \u003ctd\u003eLess than 0.1 percent (relative to end value)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePower Supply\u003c\/td\u003e\n      \u003ctd\u003e24 V DC via power contacts\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eE-bus Current Consumption\u003c\/td\u003e\n      \u003ctd\u003eTyp. 100 mA\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePower Contacts Current Consumption\u003c\/td\u003e\n      \u003ctd\u003eTyp. 60 mA\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMax. Current Load Power Contacts\u003c\/td\u003e\n      \u003ctd\u003e10 A\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eElectrical Isolation\u003c\/td\u003e\n      \u003ctd\u003e500 V (E-bus to signal voltage)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProcess Image Bit Width\u003c\/td\u003e\n      \u003ctd\u003e8 x 16 bit AO output\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eEtherCAT and Communication\u003c\/h4\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eParameter\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDistributed Clocks (DC)\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDistributed Clocks Precision\u003c\/td\u003e\n      \u003ctd\u003eLess than 1 us\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSpecial Features\u003c\/td\u003e\n      \u003ctd\u003eOptional watchdog: user-specific output value with ramp; optional user synchronization\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eEnvironmental and Wiring\u003c\/h4\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eParameter\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n      \u003ctd\u003e-25 to +60 degC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eStorage Temperature\u003c\/td\u003e\n      \u003ctd\u003e-40 to +85 degC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRelative Humidity\u003c\/td\u003e\n      \u003ctd\u003e95 percent, no condensation\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    \u003ctr\u003e\n      \u003ctd\u003eInstallation Position\u003c\/td\u003e\n      \u003ctd\u003eVariable\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMounting\u003c\/td\u003e\n      \u003ctd\u003e35 mm DIN rail (EN 60715) with lock\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eWiring Type\u003c\/td\u003e\n      \u003ctd\u003eSolid conductor, flexible conductor, and ferrule (spring actuation)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eConductor Cross-section (Solid\/Stranded)\u003c\/td\u003e\n      \u003ctd\u003e0.08 to 2.5 mm square (AWG 28 to 14)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eConductor Cross-section (Ferrule)\u003c\/td\u003e\n      \u003ctd\u003e0.14 to 1.5 mm square (AWG 26 to 16)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eStripping Length\u003c\/td\u003e\n      \u003ctd\u003e8 to 9 mm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEMC Immunity\/Emission\u003c\/td\u003e\n      \u003ctd\u003eConforms to EN 61000-6-2 \/ EN 61000-6-4\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVibration\/Shock Resistance\u003c\/td\u003e\n      \u003ctd\u003eConforms to EN 60068-2-6 \/ EN 60068-2-27\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDe-energize System:\u003c\/strong\u003e Ensure that the field power supply and the E-bus power supply are completely switched off before mounting, removing, or wiring the terminal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePhysical Mounting:\u003c\/strong\u003e Snap the terminal onto a standard 35 mm DIN rail (conforming to EN 60715). Ensure the double slot and key connections engage properly with neighboring terminals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecure Wiring:\u003c\/strong\u003e Strip conductors to a length of 8 to 9 mm. Actuate the integrated spring clamps using a standard flat-head screwdriver to insert solid, stranded, or ferruled conductors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Verification:\u003c\/strong\u003e Confirm that the 24 V DC supply is properly distributed through the power contacts. Ensure the total current through the power contacts does not exceed 10 A.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial Configuration:\u003c\/strong\u003e Power up the system and scan the node structure using TwinCAT System Manager to map the 8 x 16-bit analog output process image.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCE\u003c\/li\u003e\n  \u003cli\u003eUL\u003c\/li\u003e\n  \u003cli\u003eATEX: II 3 G Ex nA IIC T4 Gc\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106531172715,"sku":"EL4028","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/el4028-pqwk3hyqbb4.png?v=1776244515","url":"https:\/\/www.plcprotech.com\/products\/beckhoff-el4028-ethercat-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}