{"product_id":"beckhoff-kl2535-bus-terminal-2-channel-pwm-output-module","title":"Beckhoff KL2535 Bus Terminal 2-Channel PWM Output Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDirecting the precise power distribution to inductive loads, the \u003cstrong\u003eBeckhoff KL2535\u003c\/strong\u003e represents a high-efficiency 2-channel pulse-width modulation (PWM) output terminal integrated into the robust K-bus architecture. This industrial-grade output terminal is engineered specifically for control applications requiring current-regulated output power, such as proportional valves, solenoids, and magnetic coils. Utilizing high-frequency switching technology, it permits seamless duty-cycle adjustments from \u003cstrong\u003e0% to 100%\u003c\/strong\u003e with short-circuit and thermal-overload protection standard across both channels. Designed for DIN-rail deployment, the module maintains a compact form factor while providing galvanically isolated, high-resolution control signals directly from the standard PLC process image.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual PWM Outputs:\u003c\/strong\u003e Controls two independent channels rated at 24 V DC with an output current capacity up to 1 A per channel.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Frequency Modulated Control:\u003c\/strong\u003e Operates at a default PWM clock frequency of 36 kHz, ensuring ripple-reduced current stability in inductive loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComprehensive Self-Protection:\u003c\/strong\u003e Integrated short-circuit protection and cooperative thermal overload shutdown preserve system longevity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Galvanic Isolation:\u003c\/strong\u003e Provides up to 500 V electrical isolation between the internal K-bus and the field potential.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Standard 12 mm bus terminal width optimizes control cabinet real estate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProportional Valve Control:\u003c\/strong\u003e Modulates pilot valves, hydraulic directional valves, and pneumatic control assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectromagnetic Solenoids:\u003c\/strong\u003e Manages current limits and holding states for heavy-duty industrial relays and linear actuators.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal Loop Elements:\u003c\/strong\u003e Drives resistive heating elements and cooling fans using high-frequency duty cycles.\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 #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eSpecification 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: bold; border-right: 1px solid #e2e8f0;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eBeckhoff Automation\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eModel \/ Article Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eKL2535\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eNumber of Outputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eNominal Voltage\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e24 V DC (-15% \/ +20%)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eLoad Compatibility\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eInductive (\u0026gt; 1 mH), solenoid valves, coils\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eMax. Output Current\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e2 x 1 A (short-circuit and thermal-overload 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: bold; border-right: 1px solid #e2e8f0;\"\u003ePWM Frequency\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e36 kHz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eDuty Factor\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0% to 100% (current-controlled)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eResolution\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eMax. 12-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: bold; border-right: 1px solid #e2e8f0;\"\u003eElectrical Isolation\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e500 V (K-bus \/ field potential)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eCurrent Consumption (K-bus)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eTypically 60 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: bold; border-right: 1px solid #e2e8f0;\"\u003eCurrent Consumption (Power Contacts)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eLoad current only\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eProcess Image Width\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e48 inputs\/outputs (2 x 16-bit data, 2 x 8-bit control\/status)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eAddress-free; configures via Bus Coupler or controller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eOperating Temperature Range\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: bold; border-right: 1px solid #e2e8f0;\"\u003eStorage Temperature Range\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: bold; border-right: 1px solid #e2e8f0;\"\u003eRelative Humidity Limit\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: bold; border-right: 1px solid #e2e8f0;\"\u003eProtection Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIP20\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e55 g\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.25 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: bold; border-right: 1px solid #e2e8f0;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e12.5 cm x 8.0 cm x 2.4 cm\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\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 #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003eTerminal Connection Point\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eCircuit Allocation \/ Function\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: bold; border-right: 1px solid #e2e8f0;\"\u003ePoint 1\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eOutput 1+ (PWM Current Output 1)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePoint 5\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eOutput 1- (PWM Current Return 1)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePoint 2\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eOutput 2+ (PWM Current Output 2)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePoint 6\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eOutput 2- (PWM Current Return 2)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePoint 3\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e+24 V DC Field Power Supply Contact\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePoint 7\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0 V DC Field Power Supply Contact\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; border-right: 1px solid #e2e8f0;\"\u003ePoint 4 \u0026amp; 8\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eShield \/ Protective Earth (PE) Connection\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 KL2535 operates within standard Beckhoff K-bus systems. For architectures utilizing EtherCAT protocols, the EL2535 EtherCAT Terminal serves as the natural functional migration path, matching form factors and general electrical outputs but adapting to the EtherCAT E-bus interface. If upgrading older standard terminals, verify that your active Bus Coupler (such as the BK3120, BK9000, or BC9000) is running compatible firmware to parse the 48-bit control and status registers allocated by the KL2535.\u003c\/p\u003e\n\n\u003ch3\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThermal integration is a critical factor when driving both channels at their maximum 1 A current limits continuously. Under high ambient temperatures close to the 55 degC limit, proper vertical mounting and standard 10 mm lateral spacing from high-heat components are highly recommended. Note that because the PWM clock operates at 36 kHz, high-frequency current ripples can induce minor inductive heating inside solenoids if the load inductance is lower than 1 mH; verify load parameters prior to continuous cycling.\u003c\/p\u003e\n\n\u003ch3\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo minimize high-frequency electromagnetic emissions generated by the 36 kHz carrier signal, always utilize twisted-pair, shielded cabling for all load connections. Connect the cable shield directly to the designated PE terminal points (4 and 8) on the KL2535 housing or the system grounding rail. Avoid running output wires parallel to analog sensor cables to prevent crosstalk noise.\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;\"\u003eCRITICAL SAFETY WARNING:\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0.5rem 0 0 0;\"\u003eIsolate and lock out all electrical control and field power systems before installing, removing, or wiring the module. Handling terminals with active field potential can lead to controller-bus degradation, damage to output channels, or unexpected, hazardous actuation of connected mechanical actuators.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eAlign the KL2535 guide slots with the adjacent Bus Terminal and slide onto the standard DIN rail (EN 60715) until the metallic latch clicks securely.\u003c\/div\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; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eApply firm lateral pressure to ensure the integrated gold-plated tongue-and-groove K-bus contacts seat tightly with adjacent units.\u003c\/div\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; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eTerminate field wiring by pressing the terminal clamp tool into the actuation slot and inserting stripped wire conductors (up to 2.5 mm squared) into the connection point.\u003c\/div\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; border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eEnsure the power contacts are connected to an isolated external 24 V DC power source to energize the output driver circuitry.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"BECKHOFF","offers":[{"title":"Default Title","offer_id":53106492113259,"sku":"KL2535","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/kl2535-pepcyy3lb0n.png?v=1776245136","url":"https:\/\/www.plcprotech.com\/tr\/products\/beckhoff-kl2535-bus-terminal-2-channel-pwm-output-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}