{"product_id":"beckhoff-kl5121-bus-terminal","title":"BECKHOFF KL5121 Bus Terminal","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBECKHOFF KL5121\u003c\/strong\u003e is an incremental encoder interface with programmable outputs, operating as a Bus Terminal within the BECKHOFF K-bus system. It is designed for the direct connection of an incremental encoder with 24 V DC signals (including A, B, latch, and gate inputs) and features four integrated 24 V DC digital outputs. This combination allows the terminal to function as an electronic camshaft controller, executing high-speed switching operations based on the encoder position directly in the hardware, bypassing fieldbus cycle delays.\u003c\/p\u003e\n\u003cp\u003eThe terminal features a 16-bit binary counter and supports a limit frequency of up to 1,000,000 increments per second with 4-fold evaluation. The four fast programmable outputs supply up to 0.5 A of output current each, with response times under 100 microseconds. This configuration makes it highly suitable for applications requiring rapid position-based actions without relying on controller-level scan cycles.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1-channel incremental encoder interface for 24 V DC signals (A, B, latch, and gate inputs).\u003c\/li\u003e\n  \u003cli\u003eFour integrated fast programmable digital outputs (24 V DC, 0.5 A) acting as an electronic camshaft controller.\u003c\/li\u003e\n  \u003cli\u003eHigh-speed hardware-level switching under 100 microseconds, independent of the K-bus cycle time.\u003c\/li\u003e\n  \u003cli\u003e16-bit binary counter with up to 1,000,000 increments\/s limit frequency using 4-fold evaluation.\u003c\/li\u003e\n  \u003cli\u003eStandard K-bus system integration for compatibility with BECKHOFF Bus Couplers.\u003c\/li\u003e\n  \u003cli\u003eCompact, DIN-rail-mountable housing with IP20 protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eElectronic camshaft control in packaging and high-speed processing machinery.\u003c\/li\u003e\n  \u003cli\u003eFast position-based switching and sorting systems.\u003c\/li\u003e\n  \u003cli\u003eRotary axis position monitoring and boundary limit detection.\u003c\/li\u003e\n  \u003cli\u003eSynchronized material cutting and dispensing systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\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\u003eKL5121\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eBus Terminal (K-Bus)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Channels\u003c\/td\u003e\n      \u003ctd\u003e1 incremental encoder channel, 4 digital outputs\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEncoder Connection\u003c\/td\u003e\n      \u003ctd\u003eA, B, latch, gate\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEncoder Operating Voltage\u003c\/td\u003e\n      \u003ctd\u003e24 V DC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCounter\u003c\/td\u003e\n      \u003ctd\u003e16-bit binary\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLimit Frequency\u003c\/td\u003e\n      \u003ctd\u003e1,000,000 increments\/s (with 4-fold evaluation)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOutput Voltage\u003c\/td\u003e\n      \u003ctd\u003e24 V DC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOutput Current\u003c\/td\u003e\n      \u003ctd\u003e0.5 A per channel\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSwitching Times\u003c\/td\u003e\n      \u003ctd\u003e\u0026lt; 100 microseconds\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePower Supply\u003c\/td\u003e\n      \u003ctd\u003e24 V DC (-15% \/ +20%)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCurrent Consumption (Power Contacts)\u003c\/td\u003e\n      \u003ctd\u003etyp. 30 mA + load\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCurrent Consumption (K-Bus)\u003c\/td\u003e\n      \u003ctd\u003etyp. 60 mA\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBit Width in Process Image\u003c\/td\u003e\n      \u003ctd\u003e2 x 16-bit data, 2 x 8-bit control\/status\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSpecial Features\u003c\/td\u003e\n      \u003ctd\u003eElectronic camshaft controller\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    \u003ctr\u003e\n      \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n      \u003ctd\u003e0 to +55 degC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eStorage Temperature\u003c\/td\u003e\n      \u003ctd\u003e-25 to +85 degC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRelative Humidity\u003c\/td\u003e\n      \u003ctd\u003e95%, non-condensing\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    \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\u003eProtection Rating\u003c\/td\u003e\n      \u003ctd\u003eIP20\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEx Markings\u003c\/td\u003e\n      \u003ctd\u003eATEX: II 3 G Ex nA IIC T4 Gc; IECEx: Ex ec IIC T4 Gc\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApprovals\u003c\/td\u003e\n      \u003ctd\u003eCE, UL, ATEX, IECEx\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\u003eEnsure the system is completely de-energized before mounting, wiring, or removing the KL5121 terminal to prevent electrical damage or personal injury.\u003c\/li\u003e\n  \u003cli\u003eVerify that the terminal model matches your system specification and configuration requirements.\u003c\/li\u003e\n  \u003cli\u003eFit the terminal onto a standard 35 mm DIN rail (EN 60715) by snapping it firmly into position alongside other K-bus terminals.\u003c\/li\u003e\n  \u003cli\u003eEstablish reliable power-contact connections by aligning the terminal side contacts with neighboring units.\u003c\/li\u003e\n  \u003cli\u003eWire the 24 V DC incremental encoder inputs (A, B, latch, gate) and the four programmable outputs using appropriate conductor sizes, implementing shielding where necessary to minimize high-frequency interference.\u003c\/li\u003e\n  \u003cli\u003ePerform a commissioning check to verify process image mapped inputs and test output switching times within your PLC or control software.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eReplacement Recommendations\u003c\/h3\u003e\n\u003cp\u003eWhen replacing a \u003cstrong\u003eBECKHOFF KL5121\u003c\/strong\u003e, record the physical wiring assignments and power connections. Since configuration settings for the electronic camshaft thresholds and encoder parameters are typically handled via the master controller (K-bus coupler and PLC program), ensure that the replacement unit matches the existing process image mapping. Keep the system completely powered down during the hardware swap.\u003c\/p\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106439651691,"sku":"KL5121","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/kl5121-kslzubbdepz.png?v=1776245178","url":"https:\/\/www.plcprotech.com\/products\/beckhoff-kl5121-bus-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}