{"product_id":"siemens-6es7321-1bh02-0aa0-simatic-s7-300-digital-input-module","title":"Siemens 6ES7321-1BH02-0AA0 SIMATIC S7-300 Digital Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES7321-1BH02-0AA0 is a 16-channel digital input module designed for the SIMATIC S7-300 automation system. This module serves as a standard interface for connecting external 24V DC digital signals—such as limit switches, proximity sensors (BERO), and pushbuttons—to the PLC controller. It provides galvanic isolation between the process signals and the internal backplane bus, ensuring reliable data acquisition in industrial environments. This unit acts as a direct successor to the 6ES7321-1BH01-0AA0.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16 digital inputs, isolated in groups of 16.\u003c\/li\u003e\n\u003cli\u003eRated input voltage of 24V DC.\u003c\/li\u003e\n\u003cli\u003eCompatible with standard switches and two\/three\/four-wire proximity switches.\u003c\/li\u003e\n\u003cli\u003eCompact 40mm wide module design for space-efficient DIN-rail mounting.\u003c\/li\u003e\n\u003cli\u003eOpto-isolated signal processing for enhanced noise immunity.\u003c\/li\u003e\n\u003cli\u003eIntegrated status LEDs for clear signal state indication.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturing Automation: Monitoring machine interlocks, conveyor status, and sensor feedback.\u003c\/li\u003e\n\u003cli\u003eAutomotive Industry: Signal processing for robotic cells and assembly line synchronization.\u003c\/li\u003e\n\u003cli\u003eFood \u0026amp; Beverage: Packaging line monitoring, including bottle detection and fill-level sensing.\u003c\/li\u003e\n\u003cli\u003eProcess Control: Tracking valve positions, pump status, and safety-related limit switch feedback.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES7321-1BH02-0AA0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePermissible Range (DC)\u003c\/td\u003e\n\u003ctd\u003e20.4V to 28.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Loss (typ.)\u003c\/td\u003e\n\u003ctd\u003e3.5W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e500V DC tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption (Backplane)\u003c\/td\u003e\n\u003ctd\u003e10mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront Connector\u003c\/td\u003e\n\u003ctd\u003e20-pole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMounting: The module is designed to snap onto a standard S7-300 DIN rail. Ensure the module is securely locked into place.\u003c\/li\u003e\n\u003cli\u003eBus Connection: Always install the U-connector (bus connector) on the back of the module before mounting to establish communication with the CPU or adjacent modules.\u003c\/li\u003e\n\u003cli\u003eWiring: A 20-pin front connector is required for field wiring. Note that the connector features a mechanical coding mechanism; once keyed to this module type, it will only fit compatible units.\u003c\/li\u003e\n\u003cli\u003eHandling: Observe ESD precautions when handling the module. Ensure the system power is disconnected before inserting or removing the module from the rack.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the function of the 6ES7321-1BH02-0AA0?\u003c\/h3\u003e\u003cp\u003eIt is a digital input module (SM 321) for the Siemens S7-300 PLC, providing 16 isolated inputs for 24V DC signals.\u003c\/p\u003e\u003ch3\u003eWhat are the input voltage requirements?\u003c\/h3\u003e\u003cp\u003eThe rated input voltage is 24V DC. The permissible range for signal \"0\" is -30 to +5 V, and for signal \"1\" is 13 to 30 V.\u003c\/p\u003e\u003ch3\u003eDoes this module require a front connector?\u003c\/h3\u003e\u003cp\u003eYes, a 20-pin front connector is required for wiring. This connector is sold separately.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":50646570500348,"sku":"6ES7321-1BH02-0AA0","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_50b7256a-ba4d-4849-adaa-b42fb66df111.jpg?v=1785038533","url":"https:\/\/www.electronicplc.com\/products\/siemens-6es7321-1bh02-0aa0-simatic-s7-300-digital-input-module","provider":"Electronic PLC","version":"1.0","type":"link"}