{"product_id":"beckhoff-el6720-ethercat-terminal-lightbus-master","title":"Beckhoff EL6720 EtherCAT Terminal Lightbus Master","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDirectly integrating legacy Lightbus networks into high-speed EtherCAT architectures, the \u003cstrong\u003eBeckhoff EL6720\u003c\/strong\u003e serves as a deterministic 1-channel communication interface. Operating as a Lightbus master terminal, this unit facilitates high-speed optical fiber communications, ensuring complete immunity to electromagnetic interference in harsh electrical environments. The \u003cstrong\u003eBeckhoff EL6720\u003c\/strong\u003e provides an direct gateway between TwinCAT-based EtherCAT control systems and existing Lightbus field devices, handling up to 254 nodes with precise synchronization and minimal latency.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Speed Communication:\u003c\/strong\u003e Sustained data transfer rates of 2.5 Mbaud over fiber-optic networks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Node Capacity:\u003c\/strong\u003e Supports connection of up to 254 fieldbus devices and a maximum of 65,280 I\/O points.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptical Noise Immunity:\u003c\/strong\u003e Dual-channel fiber-optic standard connectors minimize electrical noise propagation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeterministic Processing:\u003c\/strong\u003e Utilizes three priority-controlled logical communication channels for optimized task execution.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReal-Time Status Monitoring:\u003c\/strong\u003e Integrated diagnostic layout featuring 3 front-panel LEDs for instant hardware and network status verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eRetrofitting and upgrading legacy Beckhoff Lightbus machinery to modern EtherCAT architectures.\u003c\/li\u003e\n  \u003cli\u003eHeavy industrial environments requiring high optical isolation from electromagnetic noise.\u003c\/li\u003e\n  \u003cli\u003eDistributed I\/O networks spanning long distances inside high-voltage switchgear cabinets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBeckhoff\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eModel \/ SKU\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eEL6720\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eTechnology\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLightbus master terminal\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eNumber of Fieldbus Channels\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e1\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eData Transfer Rate\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2.5 Mbaud\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eInterfaces\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2 x fiber-optic standard connector Z1000 (plastic fiber) or Z1010 (HCS fiber)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eCurrent Consumption E-bus\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTypically 240 mA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eHardware Diagnostics\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e3 LEDs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eHousing Dimensions (W x H x D)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e24 mm x 100 mm x 52 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0 to +55 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eStorage Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e-25 to +85 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eRelative Humidity\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e95 %, non-condensing\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eVibration \/ Shock Resistance\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eConforms to EN 60068-2-6 \/ EN 60068-2-27\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eProtection Rating \/ Position\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIP20 \/ Variable\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eEx Marking\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eII 3 G Ex nA IIC T4 Gc\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e70 g\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2.0 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eConnector Type\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eFunction Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eTx Optical Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eFiber-optic Lightbus Transmitter Output (Z1000 \/ Z1010 connection)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eRx Optical Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eFiber-optic Lightbus Receiver Input (Z1000 \/ Z1010 connection)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe EL6720 replaces legacy PCI master cards (such as the FC2001) by shifting the Lightbus controller functionality onto the standard DIN rail. TwinCAT 2.11 (or higher) and all versions of TwinCAT 3 fully support configuration of this module. Hardware topology requires a closed-ring configuration; ensure that there are no gaps in the optical line.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDo not exceed a minimum bend radius of 25 mm for standard plastic optical fiber (POF) lines. Tight bends degrade light intensity, causing intermittent framing errors or complete \"Ring Interrupted\" diagnostic states. Always verify the quality of POF termination cuts; rough or jagged cuts degrade transmission signal margins dramatically.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDuring initial commissioning in TwinCAT System Manager, utilize the \"Scan\" function under the EtherCAT Master device. If the EL6720 is correctly initialized but cannot discover Lightbus devices downstream, verify that the Tx and Rx fibers have not been crossed at the terminal connector interface.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e Completely de-energize the entire Bus Terminal assembly and ensure the system is locked out before snapping the module onto or removing it from the DIN rail. Hot-plugging or live insertion of EtherCAT terminals can degrade internal E-bus spring contacts and trigger fieldbus faults across the entire network node.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 0.75rem;\"\u003e\n  \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; justify-content: center; align-items: center; margin-right: 0.75rem; font-weight: bold;\"\u003e1\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eAlign the EL6720 with the DIN rail guide and push firmly until the mounting latch clicks securely into place.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 0.75rem;\"\u003e\n  \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; justify-content: center; align-items: center; margin-right: 0.75rem; font-weight: bold;\"\u003e2\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eSlide adjacent terminals together, ensuring that the lateral tongue-and-groove joint is locked to guarantee continuous electrical contact of the internal E-bus.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 0.75rem;\"\u003e\n  \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; justify-content: center; align-items: center; margin-right: 0.75rem; font-weight: bold;\"\u003e3\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eInsert clean, perpendicular-cut Z1000 or Z1010 fiber cables into the designated optical ports until locked.\u003c\/span\u003e\n\u003c\/div\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106452726123,"sku":"EL6720","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/el6720-utrus2dsdcm.png?v=1776244557","url":"https:\/\/www.plcprotech.com\/id\/products\/beckhoff-el6720-ethercat-terminal-lightbus-master","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}