{"product_id":"6es5-421-8ma12-siemens-simatic-s5-digital-input-module","title":"Siemens 6ES5421-8MA12 Simatic S5 Digital Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES5421-8MA12 is a digital input module engineered for the Simatic S5-090, S5-095, and S5-100 automation families. This 8-channel module is designed to interface field-level sensors, switches, and proximity devices with the central controller, converting DC field signals into reliable binary logic for processing. It is specifically optimized for applications requiring compact, high-density I\/O, such as discrete manufacturing, automated assembly, and material handling systems.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e8-channel digital input configuration for high-density signal acquisition.\u003c\/li\u003e\n\u003cli\u003eNative integration with Simatic S5 backplane architectures.\u003c\/li\u003e\n\u003cli\u003eIntegrated RC filtering to mitigate contact bounce and high-frequency EMI.\u003c\/li\u003e\n\u003cli\u003eLow power consumption design, drawing minimal current from the backplane bus.\u003c\/li\u003e\n\u003cli\u003eStandardized 24 VDC input logic suitable for common industrial sensor interfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is frequently utilized in small-to-medium scale automation tasks including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAutomated assembly line status monitoring.\u003c\/li\u003e\n\u003cli\u003eMaterial handling and conveyor control systems.\u003c\/li\u003e\n\u003cli\u003eWater treatment facility process instrumentation.\u003c\/li\u003e\n\u003cli\u003eGeneral discrete manufacturing logic control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5 421-8MA12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Logic\u003c\/td\u003e\n\u003ctd\u003eType 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e7 mA typical at 24 VDC per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.5 W max (from backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the PLC rack power is disconnected before installing or removing the module to prevent electrical damage.\u003c\/li\u003e\n\u003cli\u003eVerify that the module is correctly seated in the backplane slot to ensure reliable ribbon connection.\u003c\/li\u003e\n\u003cli\u003eRoute signal wiring away from high-voltage power cables and sources of heavy electromagnetic interference to maintain signal integrity.\u003c\/li\u003e\n\u003cli\u003eEnsure the ambient operating temperature remains within the specified 0 to 60 deg C range to prevent thermal degradation.\u003c\/li\u003e\n\u003cli\u003eUse appropriate shielded cabling for field inputs to minimize noise pickup in high-EMI environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eDoes this module require external power for the inputs?\u003c\/h3\u003e\u003cp\u003eThe 6ES5421-8MA12 typically utilizes the 24 VDC supply provided through the system backplane or common field power; please refer to your specific S5 CPU rack wiring diagram for exact power distribution requirements.\u003c\/p\u003e\u003ch3\u003eIs this module compatible with S5-115U systems?\u003c\/h3\u003e\u003cp\u003eNo, this module is specifically designed for the Simatic S5-090, 095, and 100 series. It is not intended for use in the S5-115U or higher-tier rack systems.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51002086949116,"sku":"6ES5421-8MA12","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_3de1c7e3-1009-47a2-9f46-ee61ab215b3f.jpg?v=1787333634","url":"https:\/\/www.electronicplc.com\/ar\/products\/6es5-421-8ma12-siemens-simatic-s5-digital-input-module","provider":"Electronic PLC","version":"1.0","type":"link"}