{"product_id":"beckhoff-ek1521-0010-ethercat-terminal-1-port-fiber-optic-junction","title":"Beckhoff EK1521-0010 EtherCAT Terminal 1-port Fiber-Optic Junction","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDesigned for expanding EtherCAT network topologies over long distances, the \u003cstrong\u003eBeckhoff EK1521-0010\u003c\/strong\u003e enables direct coupling of EtherCAT junctions utilizing high-performance glass fiber media. This 1-port EtherCAT fiber-optic junction converts incoming Ethernet frames from standard copper-based E-bus signals to optical signals, providing absolute galvanic isolation and total immunity to electromagnetic interference (EMI) across extended industrial networks. Featuring a standard \u003cstrong\u003eSC Duplex\u003c\/strong\u003e optical interface, it facilitates seamless connection to downstream optical nodes or couplers, maintaining precise synchronization and minimal latency across highly distributed control system architectures.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.25rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Range Communication:\u003c\/strong\u003e Supports reliable data transmission up to 20,000 meters (20 km) between active EtherCAT stations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-Mode Fiber Optimization:\u003c\/strong\u003e Designed for standard 9\/125 micrometer single-mode optical fibers to ensure low attenuation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Speed Throughput:\u003c\/strong\u003e Delivers a consistent 100 Mbit\/s bidirectional baud rate utilizing the 100BASE-FX physical layer protocol.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Low Latency:\u003c\/strong\u003e Features a propagation delay of approximately 1 microsecond, preserving high-precision distributed clock timing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Integration:\u003c\/strong\u003e Requires no software configuration or manual addressing; automatically integrated via standard TwinCAT configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eE-Bus Powered:\u003c\/strong\u003e Eliminates auxiliary field wiring by drawing operating power directly from the backplane E-bus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.25rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWind Energy \u0026amp; Turbine Control:\u003c\/strong\u003e Connecting nacelle control systems to the ground tower across long vertical distances.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWastewater and Water Treatment:\u003c\/strong\u003e Linking geographically separated pumping stations to centralized PLC control rooms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHazardous Areas (ATEX Zone 2):\u003c\/strong\u003e Safe deployment in explosive atmospheres where electrical spark isolation is critical.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Voltage Substations:\u003c\/strong\u003e Eliminating ground loop currents and electrical noise in heavy power-generation environments.\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=\"text-align: left; padding: 10px; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 10px; 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: 10px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eBeckhoff Automation\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eEK1521-0010\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eProduct Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1-Port EtherCAT Fiber-Optic Junction\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eData Transfer Medium\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eSingle-mode (SM) glass fiber (9\/125 micrometers)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eMaximum Station Distance\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e20,000 m (20 km) via 100BASE-FX\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eBus Interface\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1 x SC Duplex optical port\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eData Transfer Rate\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e100 Mbit\/s\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eProtocol Support\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eEtherCAT\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003ePower Supply Source\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eE-bus (backplane connection)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eE-bus Current Draw\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eTypical 350 mA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eInternal Propagation Delay\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eApproximately 1 microsecond\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eDimensions (W x H x D)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\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: 10px; font-weight: bold;\"\u003eHousing Material\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003ePolycarbonate\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eIngress Protection Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eIP20\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eOperating Temperature Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e-25 to +60 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eStorage Temperature Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e-40 to +85 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eRelative Humidity\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e95%, non-condensing\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eApprovals \u0026amp; Markings\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCE, UL, ATEX (II 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: 10px; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e65 g\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e2.0 kg (with industrial protection packaging)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eGermany\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=\"text-align: left; padding: 10px; font-weight: bold;\"\u003ePort Reference\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 10px; font-weight: bold;\"\u003eConnection Type\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 10px; font-weight: bold;\"\u003eFunction \/ Cable Compatibility\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: 10px; font-weight: bold;\"\u003eOptical Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eSC Duplex Connector\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eTransmits and receives optical data frames over 9\/125 micrometer single-mode fiber optic cabling.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eBackplane Interface\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eE-bus Blade Contacts\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eInterfaces directly with adjacent Beckhoff EtherCAT Terminals for power draw and logic communication.\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\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\u003cstrong\u003eAlternative Models \u0026amp; Compatibility:\u003c\/strong\u003e It is critical to differentiate the EK1521-0010 from the standard EK1521. The baseline EK1521 is optimized strictly for multi-mode fiber (50\/125 or 62.5\/125 micrometers) with a transmission limit of 2 km. In contrast, the EK1521-0010 is designed for single-mode fiber (9\/125 micrometers) to bridge up to 20 km. You cannot directly interconnect an EK1521 with an EK1521-0010 over the same optical strand; the difference in fiber core diameters will lead to severe optical attenuation and immediate communication failure.\u003c\/p\u003e\n\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\u003cstrong\u003eApplication Pitfalls \u0026amp; Engineering Notes:\u003c\/strong\u003e Always observe the minimum bending radius specified by your optical fiber manufacturer. Tight bends in the routing duct within the control enclosure can induce micro-bending losses, causing unexplained packet drops and CRC errors in TwinCAT. In addition, when placing this terminal in high-vibration applications, ensure the adjacent terminals are properly locked together utilizing the integrated double slot and key connection to prevent intermittent E-bus contacts.\u003c\/p\u003e\n\n\u003cp style=\"color: #2d3748; margin-bottom: 1.5rem;\"\u003e\u003cstrong\u003eCommissioning \u0026amp; Wiring Tips:\u003c\/strong\u003e Unused SC Duplex ports must remain sealed with their protective dust caps at all times. Microscopic dust particles on the laser transceiver interface will compromise optical performance. During commissioning, leverage the TwinCAT System Manager to monitor the \"Link Quality\" or \"Rx Power\" attributes on the terminal's diagnostic register to quickly verify optical signal health before full production startup.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 15px; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e De-energize all power supplies (both the main system power and local field potential distributors) before mounting, removing, or wiring any EtherCAT terminal. Failure to do so can cause backplane E-bus damage or trigger unexpected process shutdowns in adjacent I\/O modules.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003eAlign the EK1521-0010 on a standard 35 mm DIN rail conforming to EN 60715, pushing firmly until the rear locking mechanism securely clicks into position.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003eSlide the terminal laterally to ensure the integrated double slot and key connection on the side of the housing interlocks perfectly with the preceding EtherCAT terminal.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003eRemove the protective dust cap from the SC Duplex optical port and insert your single-mode 9\/125 micrometer fiber optic patch cable until the connector locking tab snaps home.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; padding-top: 2px;\"\u003eApply E-bus operating power and verify that the green Link\/Activity LEDs illuminate, indicating active network frame negotiation.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106516951403,"sku":"EK1521-0010","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/ek1521-0010-ob1iunodjrc.png?v=1776244360","url":"https:\/\/www.plcprotech.com\/products\/beckhoff-ek1521-0010-ethercat-terminal-1-port-fiber-optic-junction","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}