{"product_id":"siemens-6es7421-1bl01-0aa0-digital-input-module","title":"Siemens 6ES7421-1BL01-0AA0 Digital Input Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSiemens 6ES7421-1BL01-0AA0\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a 32-channel digital input module from the S7‑400 series, engineered to capture binary signals from sensors, switches, and field devices in large-scale automation systems. This DI module provides compact, high-density input acquisition, ideal for systems with limited cabinet space.\u003c\/p\u003e\n\u003cp\u003eDesigned with galvanic isolation between channels and the backplane bus, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e6ES7421-1BL01-0AA0\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprotects the PLC from electrical interference while ensuring accurate signal capture. Integrated LED indicators display channel status and fault conditions, simplifying diagnostics and maintenance. The module occupies 4 bytes of address space, allowing efficient mapping of all 32 inputs.\u003c\/p\u003e\n\u003cp\u003eRobust and compact, this module supports industrial environments, providing reliable and consistent digital signal processing for medium-to-large automation projects.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e6ES7421-1BL01-0AA0\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S7‑400 PLC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDigital Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e32 digital inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e~7 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Type\u003c\/td\u003e\n\u003ctd\u003eBinary (0\/1) acquisition from sensors and switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eGalvanic isolation between channels and backplane bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostics\u003c\/td\u003e\n\u003ctd\u003eLED indicators for channel status and fault detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAddress Space\u003c\/td\u003e\n\u003ctd\u003e4 bytes (32 bits) per module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e290 × 25 × 210 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e32 input channels for efficient signal acquisition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact design reduces cabinet space requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGalvanic isolation for safe and reliable operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLED diagnostics for fast troubleshooting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports distributed inputs across S7‑400 systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFactory Automation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMonitoring sensors and switches across production lines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProcess Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAcquiring binary signals in chemical plants, refineries, and continuous production systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnergy Systems:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eInput acquisition for turbine and generator monitoring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInfrastructure:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDistributed input monitoring for building automation and transportation systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many channels does the 6ES7421-1BL01-0AA0 provide?\u003c\/strong\u003e\u003cbr\u003eA: It offers 32 digital input channels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this module operate safely in industrial environments?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it features galvanic isolation and LED diagnostics to ensure reliable operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What type of signals does it accept?\u003c\/strong\u003e\u003cbr\u003eA: Binary 24 V DC signals from sensors, switches, and other field devices.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43071356829786,"sku":"6ES7421-1BL01-0AA0","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/6ES7421-1BL01-0AA02.jpg?v=1773985736","url":"https:\/\/www.plcmasters.com\/uk\/products\/siemens-6es7421-1bl01-0aa0-digital-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}