{"product_id":"kl9050-beckhoff-k-bus-extension-coupler-terminal","title":"KL9050 | BECKHOFF | K-Bus Extension Coupler Terminal","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050 (KL9050)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a specialized coupler terminal designed for the expansion of the Beckhoff Bus Terminal system. In large-scale automation architectures where the number of I\/O modules exceeds the capacity of a single rail or requires distribution across multiple rows in a control cabinet, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacts as the decentralized \"receiver\" or \"sub-coupler.\" It bridges the internal K-bus signal from a primary Bus Coupler (such as a BK series) or an Embedded PC to an additional segment of up to 64 Bus Terminals. By utilizing standard RJ45 connectivity, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eenables modular machine designs to remain flexible and scalable while maintaining robust communication across distances of up to 5 meters between stations.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehardware functions as a power and signal refresher for the extended K-bus segment. It features two RJ45 sockets (Input and Output) to allow for daisy-chaining multiple extension segments. Internally, it provides a 400 mA current supply to power the logic of the attached Bus Terminals, effectively acting as a localized power supply for the K-bus. The terminal also passes through the 24 VDC power contacts, supporting a current load of up to 10 A for field-side devices. For system diagnostics, an integrated green Power LED provides immediate visual confirmation of the 24 V supply status. The module is fully certified for marine applications (DNVGL) and hazardous areas (ATEX), ensuring reliable operation in demanding environments.\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\u003eKL9050\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\u003eFunction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eK-bus extension coupler terminal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBus Interface\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 x RJ45 (Input + Output)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax. Distance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 m between stations\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eK-bus Current Supply\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eup to 400 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Contacts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 V DC \/ Max. 10 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax. Terminals\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e64 per KL9050 segment\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 (power contact \/ supply voltage \/ fieldbus)\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\u003eApprovals\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCE, UL, ATEX, DNVGL\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\u003eHow do I connect the KL9050 to the main Bus Coupler?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emust be used in conjunction with a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9020\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(End Terminal with RJ45 output) located at the end of the previous terminal block. A standard shielded Ethernet cable (Cat 5 or higher) connects the KL9020 output to the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einput.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum number of extension stages allowed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Beckhoff K-bus system typically supports several extension stages, provided the total number of terminals across all segments does not exceed 255. Each\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003estarts a new segment of up to 64 terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the KL9050 require its own 24 V DC power supply?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. To power the internal K-bus logic of the new segment and to refresh the power contacts for the field devices, a 24 V DC supply must be wired directly to the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eterminal points.\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\u003eCabling Requirements:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse only high-quality, shielded RJ45 patch cables for the 5-meter connection. In environments with high electromagnetic interference (EMI), ensure the cable shielding is properly grounded to prevent K-bus communication errors or \"K-bus Reset\" faults in the controller.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Budgeting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEach\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides 400 mA for the internal K-bus logic. If the sum of the \"K-bus current consumption\" for all 64 terminals in the segment exceeds this value, you must insert a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9400\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epower supply terminal to provide additional current.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDIN Rail Installation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKL9050\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eshould be securely latched onto a 35 mm DIN rail. Ensure the PE (Protective Earth) contact on the back of the terminal makes a solid connection with the rail to ensure proper grounding of the internal electronics.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHazardous Area Safety:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFor ATEX \"Ex nA\" compliance, the unit must be installed in an enclosure with a minimum protection rating of IP54. Do not disconnect the RJ45 cables or field wiring while the system is energized to avoid potential sparking in explosive atmospheres.\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":53106669289835,"sku":"KL9050","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/kl9050-2ngdmfqjd34.png?v=1776245222","url":"https:\/\/www.plcprotech.com\/products\/kl9050-beckhoff-k-bus-extension-coupler-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}