{"product_id":"beckhoff-ks4418-ks-series-8-channel-analog-output-bus-terminal","title":"Beckhoff KS4418 KS Series 8-Channel Analog Output Bus Terminal","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eEngineered for high-density electrical cabinets, the \u003cstrong\u003eBeckhoff KS4418\u003c\/strong\u003e delivers eight independently operating analog output channels designed to transmit 0 to 20 mA signals to field actuators. This terminal combines a highly compact 12 mm form factor with a specialized pluggable wiring level, enabling rapid system maintenance and module hot-swapping without disturbing field terminations. Utilizing single-ended technology and a 12-bit digital-to-analog converter, it provides reliable setpoint transmission for valves, actuators, and speed controllers across K-bus architectures.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEight Analog Channels:\u003c\/strong\u003e High packing density allows independent 0 to 20 mA control loops within a single 12 mm wide housing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePluggable Wiring Interface:\u003c\/strong\u003e The KS-series design incorporates a detachable terminal connection level, reducing downtime during field maintenance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGalvanic Isolation:\u003c\/strong\u003e Complete 500 V electrical isolation between the internal K-bus and the process-side signals prevents ground loops.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Signal Conversion:\u003c\/strong\u003e Integrated 12-bit conversion delivers output accuracy within plus\/minus 0.2% of the full-scale value.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged Housing Design:\u003c\/strong\u003e Enclosed in robust polycarbonate with secure double-slot and key side-by-side mounting mechanisms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProportional Valve Control:\u003c\/strong\u003e Delivering continuous analog setpoints to hydraulic and pneumatic pressure regulating valves.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Frequency Drive Interfacing:\u003c\/strong\u003e Transmitting precise motor speed and torque setpoints to motor control centers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProcess Plant Automation:\u003c\/strong\u003e Integration into chemical, pharmaceutical, and water treatment plants requiring localized analog current loops.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Machine Building:\u003c\/strong\u003e High-density I\/O configuration in standard control panels where physical rail space is highly restricted.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #e2e8f0; text-align: left;\"\u003e\n        \u003cth style=\"padding: 0.75rem; font-weight: 600;\"\u003eSpecification Parameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; font-weight: 600;\"\u003eTechnical Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBeckhoff\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eKS4418\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eSignal Technology\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSingle-ended\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eNumber of Outputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e8\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eSignal Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0 to 20 mA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eResolution\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e12-bit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eConversion Time\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eApproximately 8 ms\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eLoad Resistance\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLess than 150 Ohms (short-circuit proof)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eOutput Limit Error\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLess than plus\/minus 0.2% (relative to end value)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eElectrical Isolation\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e500 V (K-bus to signal voltage)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eCurrent Consumption (K-Bus)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTypical 20 mA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eCurrent Consumption (Power Contacts)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTypical 60 mA + load\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003ePower Supply Input\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e24 V DC via power contacts (or 15 V DC via KL9515 supply terminal)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eConductor Connection Method\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003ePluggable Tension-Clamp \/ Spring-actuated\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eWire Cross-Section Limits\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSolid: 0.08 to 1.5 mm2 | Stranded: 0.08 to 1.5 mm2 | Fine: 0.14 to 1.5 mm2\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eWire Cross-Section (AWG)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eAWG 28 to 16 (Solid\/Stranded) | AWG 26 to 16 (Fine)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eStripping Length\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e9 to 10 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0 to +55 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eStorage Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e-25 to +85 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eRelative Humidity Limits\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e95%, non-condensing\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eIngress Protection Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIP20 (with variable installation positioning)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003ePhysical Dimensions\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e68 mm Depth x 12 mm Width x 100 mm Height\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eNet Unit Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.075 kg;\"\u003e0.075 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: 600;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.250 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\n\u003ch3\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe terminal is functionally identical to the standard Beckhoff KL4418 bus terminal. The core architectural distinction is the pluggable terminal block of the KS-series (KS4418), which enables swift electrical hot-swaps of physical units during critical system maintenance without disconnecting field control cables. They utilize identical GSD and XML device description files inside TwinCAT or alternate fieldbus master software configurations.\u003c\/p\u003e\n\n\u003ch3\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eSpecial attention must be paid to loop resistance constraints. With a maximum load capacity of 150 Ohms, deploying long wire runs or high-impedance field instruments may exceed the voltage compliance limits of the internal driver circuits. Exceeding 150 Ohms will cause output current saturation below the required 20 mA signal level, resulting in measurement deviations and system tracking errors without necessarily triggering a hardware fault code.\u003c\/p\u003e\n\n\u003ch3\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo maintain output accuracy within the rated plus\/minus 0.2% tolerance under heavy electromagnetic environments, we recommend installing twisted-pair shielded cables (STP) for all 8 analog channels. Ensure the cable shield is cleanly terminated to the earth grounding rail at the control panel entry point. To avoid ground loops with single-ended outputs, confirm that the ground references of connected external devices match the local module ground potential.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 0.5rem;\"\u003eCRITICAL FIELD WARNING\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0;\"\u003eIsolate and lock out all 24 V DC power sources supplied to the bus coupler and field side power contacts before mounting or dismounting the terminal. Inserting or removing modules from an active backplane can disrupt internal K-bus communications, causing unpredicted behavior or immediate safety trips across other network nodes.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eMount the unit onto a standard 35 mm DIN rail conforming to EN 60715, sliding it laterally until the double-slot key connection locks firmly with the neighboring terminal.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eInsert the conductor wires (0.08 to 1.5 mm2) using a flat-head screwdriver to actuate the integrated tension clamp, or plug in the pre-wired KS terminal block.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eApply logic power to the bus coupler to verify that the K-bus cycle establishes and the downstream network terminals synchronize correctly.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106504466795,"sku":"KS4418","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/ks4418-21gwhoxvmvd.png?v=1776245322","url":"https:\/\/www.plcprotech.com\/fa\/products\/beckhoff-ks4418-ks-series-8-channel-analog-output-bus-terminal","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}