{"product_id":"siemens-6es7221-3bd30-0xb0-programmable-logic-controller-module","title":"Siemens 6ES7221-3BD30-0XB0 Programmable Logic Controller Module","description":"\u003cdiv\u003e\u003cp\u003eThe Siemens 6ES7221-3BD30-0XB0 is a SB 1221 digital input module for the SIMATIC S7-1200 family that provides four 24 V DC digital inputs with a 200 kHz input scan rate, enabling fast, reliable sensing of field devices. The module offers four sourcing (PNP) inputs, drawing operating current from the 5 V backplane and typically consuming about 40 mA, with a measured power loss around 1 W under normal use. It is designed to plug into the S7-1200 backplane alongside other I\/O modules and is compatible with existing S7-1200 CPUs for scalable control architectures. This part is cataloged as PM300: Active Product, but Siemens lists a phase-out effective November 1, 2026, so prospective buyers may plan accordingly. The SB 1221 family, including 6ES7221-3BD30-0XB0, focuses on digital input expansion, delivering four channels of 24 V DC input to monitor sensors such as pushbuttons, door switches, proximity sensors, and similar devices in automation applications. In practical use, engineers deploy this module to expand a controller’s input footprint in compact control cabinets where high-speed, reliable digital signaling is required.\u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"New","offer_id":46268579053802,"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-6es7221-3bd30-0xb0-programmable-logic-controller-module","provider":"GTG Hardware","version":"1.0","type":"link"}