{"product_id":"ks3021-1-channel-analog-input-terminal-4-20-ma-differential","title":"KS3021 Bornier d'entrée analogique 1 canal 4-20 mA différentiel","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eKS3021 (KS3021)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-precision 1-channel analog input terminal designed for the processing of standard 4 to 20 mA industrial signals. Utilizing advanced differential input technology, this terminal is specifically engineered to eliminate ground loop interference and suppress common-mode noise, making it an ideal choice for long-distance sensor deployments in harsh electromagnetic environments. In sectors such as chemical processing, water treatment, and HVAC control, the KS3021 provides the reliability needed for critical telemetry. With a fast 1 ms conversion time and 12-bit resolution, it ensures that dynamic process variables are captured with high fidelity. The \"KS\" designation signifies a pluggable wiring level, allowing for rapid module replacement without disturbing the existing field instrumentation wiring.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe KS3021 integrates a differential input stage with an internal resistance of 80 Ω plus a 0.7 V diode voltage drop. It supports a maximum common-mode voltage of 35 V, providing significant robustness against potential shifts between the sensor ground and the control system ground. The terminal is powered entirely via the internal K-bus, drawing a typical current of 60 mA, which simplifies cabinet power distribution by eliminating the need for external 24 VDC power contact connections. For safety-critical or hazardous area applications, the module features 500 V electrical isolation between the K-bus and the signal level, and carries ATEX Ex nA IIC T4 Gc certification for use in Zone 2 explosive atmospheres.\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\u003eKS3021\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\u003eNumber of Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSignal Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 to 20 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTechnology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDifferential Input\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12 bit\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConversion Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApprox. 1 ms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMeasuring Error\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; ±0.3 percent (relative to full scale)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommon-mode Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMax 35 V\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 (K-bus \/ signal voltage)\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\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 55 deg C\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 is the primary advantage of the pluggable wiring level on the KS3021?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe KS-series terminals feature a detachable wiring plug. This allows maintenance personnel to replace a faulty module by simply unplugging the pre-wired terminal block and inserting it into a new unit. This eliminates the risk of wiring errors and significantly reduces Mean Time to Repair (MTTR) in 24\/7 production environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the differential input handle signal noise compared to single-ended inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe differential input measures the voltage difference between two signal lines rather than measuring one line against a common ground. This configuration effectively cancels out \"common-mode\" noise that affects both wires equally, which is essential for maintaining signal integrity in areas with high motor interference or variable frequency drives.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this terminal suitable for use in hazardous locations?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the KS3021 is ATEX certified with the marking II 3 G Ex nA IIC T4 Gc. It is approved for use in Zone 2 environments, provided it is installed in an appropriately rated enclosure that meets the requirements of the industrial site safety standards.\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\u003eWiring Precision and Stripping:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse solid or stranded conductors with a cross-section of 0.08 to 1.5 mm squared (AWG 28-16). Ensure a precise stripping length of 9 to 10 mm. Use a small flat-head screwdriver to actuate the spring clamp; the pluggable block ensures that once wired, the connections remain vibration-proof according to EN 60068 standards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGrounding and Shielding:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTo maximize the benefits of the differential input, use shielded twisted-pair cables. The shield should be connected to a functional earth (FE) point at the terminal entry using a shield bracket to divert high-frequency interference away from the internal 12-bit A\/D converter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eK-bus Power Management:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSince the KS3021 draws its power solely from the K-bus (60 mA), always verify the total power budget of your Bus Coupler. If the total K-bus current of all attached terminals exceeds the coupler's limit (e.g., 500 mA or 1000 mA), a K-bus refresh terminal must be added to the segment.\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":53106686984555,"sku":"KS3021","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/ks3021-cmglizv1uwt.png?v=1776245281","url":"https:\/\/www.plcprotech.com\/fr\/products\/ks3021-1-channel-analog-input-terminal-4-20-ma-differential","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}