{"product_id":"6es7321-1bh02-0aa0-siemens-digital-input-module","title":"Siemens 6ES7321-1BH02-0AA0 Digital Input Module","description":"\u003cdiv\u003e\u003cp\u003eSiemens 6ES7321-1BH02-0AA0 is a SIMATIC S7-300 digital input module (SM 321) that provides 16 isolated DC inputs at 24 V to monitor field devices such as pushbuttons, switches, and sensors. Mounted as an expansion card in the S7-300 backplane, it uses a single 20‑pole front connector to deliver all 16 inputs, with galvanic isolation between the field side and the CPU backplane for safety and noise immunity. This 16‑DI module is compatible with the SIMATIC S7-300 family and is typically used to read binary input signals from automation lines, conveyors, and machine control panels. Each input accepts standard 24 V DC signals, enabling straightforward wiring to common industrial sensors and switches. The SM 321 digital input module is commonly specified for projects requiring scalable input counts on existing S7-300 installations, allowing straightforward expansion without a complete controller replacement.\u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"New","offer_id":46268585181418,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-018.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/6es7321-1bh02-0aa0-siemens-digital-input-module","provider":"GTG Hardware","version":"1.0","type":"link"}