{"product_id":"cx5120-n031-beckhoff-intel-atom-embedded-pc-with-terminated-rs485-interface","title":"CX5120-N031 BECKHOFF PC embarqué Intel Atom avec interface RS485 terminée","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCX5120-N031 (CX5120N031)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance, fanless Embedded PC designed for DIN rail mounting, powered by an efficient Intel Atom® multi-core processor. This specific configuration is equipped with a factory-integrated\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRS485 interface\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003evia a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e9-pin D-sub socket\u003c\/strong\u003e, specifically configured for use as an\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eend point\u003c\/strong\u003e. In industrial B2B sectors such as building automation, renewable energy monitoring, and long-distance serial networking, the CX5120-N031 serves as a robust intelligent controller. It excels in bridging high-speed EtherCAT I\/O with legacy serial bus systems, providing the computational overhead required for TwinCAT 3 PLC and Motion Control tasks while maintaining a rugged, maintenance-free hardware profile.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration (Deep Dive)\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCX5120-N031\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis technically optimized for RS485 bus integrity. Unlike the -0002 variant, this \"N031\" model is pre-configured as an\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eend point with termination on\u003c\/strong\u003e. This means the internal 120-ohm termination resistor is active, and the module is set to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ewithout echo\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(half-duplex). This configuration is critical for preventing signal reflections in serial RS485 networks, ensuring high-speed data reliability over long cable runs without the need for external resistors.\u003c\/p\u003e\n\u003cp\u003eThe unit leverages the advanced Intel Atom® architecture to deliver a superior performance-to-watt ratio. It supports automatic recognition of both\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eE-bus (EtherCAT)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eK-bus (Bus Terminals)\u003c\/strong\u003e, allowing it to function as a universal head-station for any Beckhoff I\/O segment. The fanless design ensures longevity in dusty or vibration-prone environments where active cooling would fail.\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\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\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\u003e\u003cstrong\u003eCX5120-N031\u003c\/strong\u003e\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\u003e\u003cstrong\u003eBECKHOFF\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProcessor\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIntel Atom® (High-efficiency Multi-core)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInterface Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 x RS485\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConnection Port\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e9-pin D-sub socket\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRS485 Config\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eEnd point, without echo, \u003cstrong\u003eTermination ON\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eExpansion Bus\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAutomatic E-bus \/ K-bus recognition\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFanless (Passive Convection)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e35 mm DIN rail (EN 60715)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-25 to +60 Celsius\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApprox. 590 g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProtection Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP20\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 VDC (-15 % \/ +20 %)\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\u003eWhat does \"Termination ON\" mean for my network design?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCX5120-N031\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehas an internal 120-ohm resistor engaged across the RS485 data lines. This module\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emust\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebe placed at the physical beginning or the physical end of your RS485 daisy-chain to ensure impedance matching and prevent signal distortion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this for Modbus RTU communication?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAbsolutely. The RS485 interface is fully compatible with the Modbus RTU protocol. In TwinCAT, you can simply map the serial port to the Modbus RTU master or slave library to communicate with drives, meters, or third-party sensors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this model support TwinCAT 3 Platform Level 40?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The CX5120 series typically operates at the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePerformance (40)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eplatform level, providing ample power for multi-tasking PLC environments and complex communication handling.\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\u003eNetwork Topology:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBecause this unit is configured with internal termination, avoid placing it in the middle of an RS485 bus. Doing so would load the bus incorrectly and likely cause communication errors. Always use shielded, twisted-pair cable for the D-sub connection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Clearances:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFor fanless operation up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e60 Celsius\u003c\/strong\u003e, the unit must be mounted horizontally. Ensure a minimum of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e30 mm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eof free space above and below the cooling fins to allow for natural heat dissipation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBus Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe CX5120 detects the connected I\/O bus type during the boot phase. When switching from E-bus to K-bus terminals, ensure a complete power cycle of the system to allow the automatic bus recognition logic to reset.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCX5120-N031\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erepresents a professional-grade solution for \"Legacy-to-Industry 4.0\" integration. By integrating a hardware-terminated RS485 port directly into a powerful Intel Atom® PC, it reduces the need for external gateways and specialized wiring. Its durability is proven by its compliance with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEN 60068-2-6\/27\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor vibration and shock resistance, ensuring it remains operational in the most demanding industrial settings. The combination of high-speed local I\/O expansion and ready-to-use serial networking makes it one of the most flexible Embedded PCs in the Beckhoff portfolio.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106701992299,"sku":"CX5120-N031","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/cx5120-n031-q0p2yr10i0q.png?v=1776244273","url":"https:\/\/www.plcprotech.com\/fr\/products\/cx5120-n031-beckhoff-intel-atom-embedded-pc-with-terminated-rs485-interface","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}