{"product_id":"siemens-6es7-321-1ff01-0aa0-digital-input-module","title":"Siemens 6ES7 321-1FF01-0AA0 Digital Input Module","description":"\u003cdiv\u003e\u003cp\u003eSiemens 6ES7 321-1FF01-0AA0 is the SIMATIC S7-300 digital input module (SM321) that provides eight isolated inputs for AC signals, designed to accept 120 to 230 V AC. This 8 DI module is built to read external field signals into the PLC while isolating the controller from process wiring, a key protection feature in industrial environments. The unit carries the order number 6ES7 321-1FF01-0AA0 and is cataloged as SM321 with 8 inputs rated for AC 120\/230 V, isolated, and it uses a 20-pin connector for field wiring, enabling straightforward integration into an S7-300 rack with other SM321 variants. As part of the SM321 family, it is a discrete I\/O option for Siemens SIMATIC S7-300 systems, commonly employed to interface sensors and other AC-driven devices that provide on\/off signals to the PLC. \u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46268551135466,"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\/siemens-6es7-321-1ff01-0aa0-digital-input-module","provider":"GTG Hardware","version":"1.0","type":"link"}