{"product_id":"beckhoff-kl4012-bus-terminal","title":"BECKHOFF KL4012 Bus Terminal","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBECKHOFF KL4012\u003c\/strong\u003e is a 2-channel analog output Bus Terminal designed for precise current-loop control within industrial automation systems. Operating on the K-bus system, this terminal generates analog signals in the range of 0 to 20 mA with a resolution of 12 bits, making it suitable for driving actuators, process controllers, and variable speed drives requiring current inputs.\u003c\/p\u003e\n\u003cp\u003eEach channel of the BECKHOFF KL4012 is electrically isolated from the K-bus up to 500 V, protecting control-level components from field-side electrical noise and potential differences. The terminal field-side electronics are supplied via the 24 V DC power contacts, ensuring electrical separation and simple system design.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo single-ended analog output channels.\u003c\/li\u003e\n  \u003cli\u003eAnalog output current range of 0 to 20 mA.\u003c\/li\u003e\n  \u003cli\u003e12-bit resolution for precise analog control.\u003c\/li\u003e\n  \u003cli\u003eElectrical isolation of 500 V between the K-bus and the signal lines.\u003c\/li\u003e\n  \u003cli\u003eSupport for optional control and status bytes via the process image.\u003c\/li\u003e\n  \u003cli\u003eDirect integration with standard K-bus couplers and controllers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAnalog control of valves, positioning units, and actuators.\u003c\/li\u003e\n  \u003cli\u003eIntegration with variable frequency drives (VFD) via current reference inputs.\u003c\/li\u003e\n  \u003cli\u003eProcess loop integration and transmitter reference signaling.\u003c\/li\u003e\n  \u003cli\u003eGeneral industrial automation and machine control architectures using current-driven loops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003eGeneral and Signal Specifications\u003c\/h4\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\u003eKL4012\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eAnalog Output Bus Terminal\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNumber of Channels\u003c\/td\u003e\n      \u003ctd\u003e2\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSignal Current Range\u003c\/td\u003e\n      \u003ctd\u003e0 to 20 mA\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eResolution\u003c\/td\u003e\n      \u003ctd\u003e12 bit\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOutput Error\u003c\/td\u003e\n      \u003ctd\u003e\u0026lt; ±0.1 % (relative to full scale value)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLoad Resistance\u003c\/td\u003e\n      \u003ctd\u003e\u0026lt; 500 ohms\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eConversion Time\u003c\/td\u003e\n      \u003ctd\u003eapprox. 1.5 ms\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTechnology\u003c\/td\u003e\n      \u003ctd\u003eSingle-ended\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eElectrical Specifications\u003c\/h4\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\u003ePower Supply\u003c\/td\u003e\n      \u003ctd\u003e24 V DC via power contacts (or 15 V DC via KL9515 potential supply terminal)\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\u003eCurrent Consumption (Power Contacts)\u003c\/td\u003e\n      \u003ctd\u003etyp. 50 mA + load\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\u003eProcess Image Bit Width\u003c\/td\u003e\n      \u003ctd\u003eOutput: 2 x 16-bit data (2 x 8-bit control\/status optional)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eMechanical and Environmental\u003c\/h4\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\u003eWeight\u003c\/td\u003e\n      \u003ctd\u003eapprox. 80 g\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n      \u003ctd\u003e-25 to +60 degC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eStorage Temperature\u003c\/td\u003e\n      \u003ctd\u003e-40 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\u003eProtection Rating\u003c\/td\u003e\n      \u003ctd\u003eIP20\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eInstallation Position\u003c\/td\u003e\n      \u003ctd\u003eVariable\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eConnections \/ Interfaces\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eTerminal Contact\u003c\/th\u003e\n      \u003cth\u003eFunction\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTerminal 1\u003c\/td\u003e\n      \u003ctd\u003eAnalog Output 1+\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTerminal 2\u003c\/td\u003e\n      \u003ctd\u003eAnalog Output 2+\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTerminal 3\u003c\/td\u003e\n      \u003ctd\u003e+24 V DC (Power Contact)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTerminal 5\u003c\/td\u003e\n      \u003ctd\u003eAnalog Output 1-\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTerminal 6\u003c\/td\u003e\n      \u003ctd\u003eAnalog Output 2-\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTerminal 7\u003c\/td\u003e\n      \u003ctd\u003e0 V (Power Contact Ground)\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 industrial control system and power supply are fully de-energized before beginning installation, modification, or maintenance tasks.\u003c\/li\u003e\n  \u003cli\u003eMount the BECKHOFF KL4012 Bus Terminal onto a standard 35 mm DIN rail (EN 60715) by sliding it into place until the locking mechanism engages securely.\u003c\/li\u003e\n  \u003cli\u003eVerify alignment with adjacent bus terminals to ensure proper mechanical connection and contact integrity of the internal K-bus and power contacts.\u003c\/li\u003e\n  \u003cli\u003eConnect signal lines to the designated terminal points according to the connections table using appropriate conductor sizes.\u003c\/li\u003e\n  \u003cli\u003eUpon physical integration, configure the terminal using TwinCAT or compatible controller environment ensuring the process image matches the terminal parameters.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106497618283,"sku":"KL4012","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/kl4012-hthjsl4t4b5.png?v=1776245166","url":"https:\/\/www.plcprotech.com\/products\/beckhoff-kl4012-bus-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}