{"product_id":"beckhoff-kl6021-bus-terminal","title":"BECKHOFF KL6021 Bus Terminal","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBECKHOFF KL6021\u003c\/strong\u003e is a single-channel serial interface Bus Terminal designed to enable direct integration of devices with RS422 or RS485 interfaces into the modular Beckhoff Bus Coupler system. Operating as part of the K-bus terminal network, this module provides bidirectional data transfer for TxD and RxD channels in both full and half-duplex modes. The terminal operates independently of the higher-level fieldbus system, allowing simple, protocol-neutral serial communication directly from the controller.\u003c\/p\u003e\n\u003cp\u003eEquipped with integrated electrical isolation between the K-bus and the signal lines, the \u003cstrong\u003eBECKHOFF KL6021\u003c\/strong\u003e ensures high noise immunity and safeguards sensitive control components from field-side electrical disturbances. The terminal requires no manual address settings or hardware configuration switches, as all setup parameters are handled directly through the system controller or Bus Coupler.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle-channel serial interface supporting RS422 and RS485 physical layers\u003c\/li\u003e\n  \u003cli\u003eBi-directional transmission via TxD and RxD lines with full-duplex or half-duplex configuration\u003c\/li\u003e\n  \u003cli\u003eConfigurable data transfer rates ranging from 1200 to 19,200 baud\u003c\/li\u003e\n  \u003cli\u003eIntegrated 128-byte receive buffer and 16-byte transmit buffer to handle peak data traffic\u003c\/li\u003e\n  \u003cli\u003eElectrical isolation of 500 V between the internal K-bus and the field-side serial lines\u003c\/li\u003e\n  \u003cli\u003eFlexible bit width configuration in the process image to optimize control system data exchange\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eConnecting serial devices such as barcode scanners, card readers, and industrial printers to the PLC\u003c\/li\u003e\n  \u003cli\u003eInterfacing with digital weighing scales and industrial measurement sensors\u003c\/li\u003e\n  \u003cli\u003eEstablishing point-to-point serial communication links over distances up to 1000 meters using twisted-pair cabling\u003c\/li\u003e\n  \u003cli\u003eIntegrating legacy controllers or third-party serial equipment into modern Beckhoff I\/O networks\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\u003eExact Model\u003c\/td\u003e\n      \u003ctd\u003eKL6021\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eBus Terminal\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTechnology\u003c\/td\u003e\n      \u003ctd\u003eRS422 \/ RS485 serial interface\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Channels\u003c\/td\u003e\n      \u003ctd\u003e1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eData Transfer Rates\u003c\/td\u003e\n      \u003ctd\u003e1200...19,200 baud (default: 9600 baud, 8 data bits, no parity, 1 stop bit)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eData Buffer\u003c\/td\u003e\n      \u003ctd\u003e128 bytes receive buffer, 16 bytes transmit buffer\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBit Width in Process Image\u003c\/td\u003e\n      \u003ctd\u003eInput\/output: 3 x 8-bit user data, 1 x 8-bit control\/status (up to 5 x 8-bit user data possible)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNominal Voltage\u003c\/td\u003e\n      \u003ctd\u003e24 V DC (via K-bus)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCurrent Consumption (K-bus)\u003c\/td\u003e\n      \u003ctd\u003etyp. 65 mA\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCurrent Consumption (Power Contacts)\u003c\/td\u003e\n      \u003ctd\u003e- (no power contacts)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eElectrical Isolation\u003c\/td\u003e\n      \u003ctd\u003e500 V (K-bus \/ signal voltage)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLine Impedance\u003c\/td\u003e\n      \u003ctd\u003e120 ohms\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCable Length\u003c\/td\u003e\n      \u003ctd\u003eapprox. 1000 m twisted pair\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%, no condensation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProtection Class\u003c\/td\u003e\n      \u003ctd\u003eIP20\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApprovals\/Markings\u003c\/td\u003e\n      \u003ctd\u003eCE, UL, ATEX\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEx Marking\u003c\/td\u003e\n      \u003ctd\u003eII 3 G Ex nA IIC T4 Gc\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 entire automation system and field power supplies are completely de-energized before mounting or removing the module.\u003c\/li\u003e\n  \u003cli\u003eMount the terminal onto a standard 35 mm DIN rail (EN 60715) by aligning it and snapping it into place next to the Bus Coupler or adjacent terminals.\u003c\/li\u003e\n  \u003cli\u003eEnsure that the self-locking K-bus contacts on the side of the terminal engage securely with the neighboring units.\u003c\/li\u003e\n  \u003cli\u003eWire the RS422 or RS485 communication lines using shielded, twisted-pair cables to prevent electromagnetic interference over long cable runs.\u003c\/li\u003e\n  \u003cli\u003eOnce physical connections are complete, energize the system and configure the baud rate, parity, and stop bit parameters in the PLC configuration software.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eReplacement Recommendations\u003c\/h3\u003e\n\u003cp\u003eWhen replacing a failed terminal, verify that the configuration of the new module matches the original unit's settings in the controller. Because the \u003cstrong\u003eBECKHOFF KL6021\u003c\/strong\u003e relies on parameterization from the Bus Coupler or PLC program, ensure the serial parameters (baud rate, data bits, parity, stop bits) are correctly initialized during system startup to restore seamless communication with the connected peripheral device.\u003c\/p\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106524553579,"sku":"KL6021","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/kl6021-axxc4hnlw4o.png?v=1776245198","url":"https:\/\/www.plcprotech.com\/products\/beckhoff-kl6021-bus-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}