{"product_id":"kl6904-beckhoff-twinsafe-logic-bus-terminal-4-port-digital-output-24-v-dc-0-5-a","title":"KL6904 | Beckhoff TwinSAFE Logic Bus Terminal 4-Port Digital Output 24 V DC 0.5 A","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"101\" data-end=\"438\"\u003eThe Beckhoff KL6904 is a TwinSAFE logic Bus Terminal that integrates communication and safety logic with four digital safety outputs. Operating at 24 V DC with 0.5 A per channel, it enables the configuration of certified safety functions such as emergency stop or safety door monitoring within EtherCAT and TwinSAFE systems.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 99.964%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eBeckhoff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eIndustrial Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eKL6904\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eTwinSAFE Logic Terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eCommunication interface and 4-port safe digital output terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eTwinSAFE \/ Safety over EtherCAT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eConnection Technology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e2-wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eLink unit between safe input and output signals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eNumber of Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e4 safe digital outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eMax. 0.5 A (per channel), min. 20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eCycle Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e4…100 ms (configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eFault Response Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e≤ watchdog time (parameterizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eSafety Standards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eEN ISO 13849-1:2008 (Cat. 4, PL e), EN 61508:2010 (SIL 3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eTwinSAFE Connections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eUp to 15 safe connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eTwinSAFE Groups\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eUp to 8 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eFunction Blocks\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eUp to 48 configurable safety logic blocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eCommunication Interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eVia fieldbus using TwinCAT System Manager\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eK-bus Current Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eMax. 250 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003ePower Contact Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eLoad-dependent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eInstallation Position\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eHorizontal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eElectrical Isolation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eBetween field and logic circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eApprox. 100 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e0°C to +55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e-25°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eRelative Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003e95%, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 23.4805%;\"\u003e\u003cstrong\u003eProtection Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3863%;\"\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003eKL6904\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe KL6904 is part of Beckhoff’s TwinSAFE series, providing integrated safety control directly within the Bus Terminal I\/O system. Designed for use in safety-critical automation applications, it combines communication, logic, and safe output control in one module. It allows configuration of up to 15 TwinSAFE connections, 48 function blocks, and 8 TwinSAFE groups for flexible safety programming. Typical applications include implementing emergency stop circuits, guard door monitoring, and two-hand control systems. The logic is configured through the TwinCAT System Manager and downloaded via the fieldbus, enabling centralized control without additional safety controllers. Its four safe digital outputs allow direct connection to actuators, simplifying wiring and reducing hardware requirements. With certifications up to SIL 3 (IEC 61508) and PL e (ISO 13849), the KL6904 ensures high functional safety, reliability, and easy integration into existing EtherCAT and Safety-over-EtherCAT systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIntegrated TwinSAFE Logic: Combines safety logic, communication, and output control within a single Bus Terminal module for simplified system design.\u003c\/li\u003e\n\u003cli\u003eConfigurable Safety Functions: Supports up to 48 certified safety function blocks such as emergency stop, two-hand control, and safety gate monitoring.\u003c\/li\u003e\n\u003cli\u003eHigh Safety Compliance: Certified to SIL 3 (EN 61508) and PL e (ISO 13849-1, Cat. 4) for demanding industrial safety applications.\u003c\/li\u003e\n\u003cli\u003eFlexible Communication: Operates via Safety over EtherCAT, enabling reliable data exchange with other TwinSAFE devices across the network.\u003c\/li\u003e\n\u003cli\u003eFour Safe Outputs: Provides four individually monitored outputs rated at 0.5 A each, suitable for direct control of safety actuators.\u003c\/li\u003e\n\u003cli\u003eScalable Safety Architecture: Allows up to 15 TwinSAFE connections and 8 groups, supporting decentralized and modular system layouts.\u003c\/li\u003e\n\u003cli\u003eAdjustable Cycle Time: Configurable response time between 4 and 100 ms for adapting to various safety and performance requirements.\u003c\/li\u003e\n\u003cli\u003eEasy Configuration via TwinCAT: Safety parameters, logic, and function blocks are configured through the TwinCAT System Manager for user-friendly setup.\u003c\/li\u003e\n\u003cli\u003eCompact and Robust Design: Slim IP20 housing optimized for control cabinet installation with reliable horizontal mounting.\u003c\/li\u003e\n\u003cli\u003eComprehensive Fault Monitoring: Detects wire breaks, communication faults, and configuration errors to maintain system integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe KL6904 delivers the reliability and precision required for advanced functional safety, providing modular, software-configurable protection for machinery and automation systems.\u003c\/p\u003e","brand":"Build Your Perfect Outdoor","offers":[{"title":"Default Title","offer_id":63840310493553,"sku":"KL6904","price":297.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0987\/1992\/4593\/files\/kl6904__web_preview.png?v=1781110811","url":"https:\/\/mancavebackyard.com\/products\/kl6904-beckhoff-twinsafe-logic-bus-terminal-4-port-digital-output-24-v-dc-0-5-a","provider":"JayBeauty","version":"1.0","type":"link"}