{"id":5989,"date":"2026-03-31T14:31:26","date_gmt":"2026-03-31T06:31:26","guid":{"rendered":"https:\/\/atfits.com\/?post_type=product&p=5989"},"modified":"2026-03-31T14:31:26","modified_gmt":"2026-03-31T06:31:26","slug":"siemens-6es7-221-3ad30-0xb0-digital-input-sb-1221-6es7221-3ad30-0xb0","status":"publish","type":"product","link":"https:\/\/atfits.com\/es\/producto\/siemens-6es7-221-3ad30-0xb0-digital-input-sb-1221-6es7221-3ad30-0xb0\/","title":{"rendered":"Siemens 6ES7 221-3AD30-0XB0 DIGITAL INPUT SB 1221 6ES7221-3AD30-0XB0"},"content":{"rendered":"

Siemens 6ES7221-3AD30-0XB0 Digital Input SB 1221<\/h1>\n
<\/div>\n

Product Overview<\/h2>\n
<\/div>\n
The Siemens 6ES7221-3AD30-0XB0 is a SB 1221 digital input signal board<\/strong> designed for direct installation on SIMATIC S7\u20111200 CPUs. It provides a compact and cost-effective way to expand the digital input capability of the controller, allowing connection to field binary devices such as pushbuttons, limit switches, proximity sensors, and other 24 V DC switching devices. As a plug-in signal board, it occupies minimal space and is widely used in small automation systems, control cabinets, machinery, and building automation applications requiring flexible I\/O extension.<\/div>\n
<\/div>\n

Main Functions<\/h2>\n
<\/div>\n
    \n
  1. \n
    Digital Input Signal Acquisition<\/strong><\/div>\n
    <\/div>\n
      \n
    • Captures and converts external 24 V DC binary switching signals into logical signals for the S7\u20111200 CPU.<\/li>\n
    • Provides reliable detection of ON\/OFF states from field sensors and manual operating devices.<\/li>\n<\/ul>\n
      <\/div>\n<\/li>\n
    • \n
      Input Filtering and Anti-Interference<\/strong><\/div>\n
      <\/div>\n
        \n
      • Built-in input filtering suppresses electromagnetic interference and contact bounce, ensuring stable and accurate signal detection.<\/li>\n
      • Improves operational stability in harsh industrial environments with high electrical noise.<\/li>\n<\/ul>\n
        <\/div>\n<\/li>\n
      • \n
        Voltage and Wiring Compatibility<\/strong><\/div>\n
        <\/div>\n
          \n
        • Supports 24 V DC nominal input voltage, matching standard industrial sensor and actuator systems.<\/li>\n
        • Allows flexible wiring configuration to suit different field device types.<\/li>\n<\/ul>\n
          <\/div>\n<\/li>\n
        • \n
          Status Indication<\/strong><\/div>\n
          <\/div>\n
            \n
          • Equipped with LED indicators for each input channel to show real-time signal status.<\/li>\n
          • Supports quick on-site diagnostics and visual monitoring of input activity.<\/li>\n<\/ul>\n
            <\/div>\n<\/li>\n
          • \n
            Direct CPU Integration<\/strong><\/div>\n
            <\/div>\n
              \n
            • Plugs directly into the onboard signal board socket of the S7\u20111200 CPU without tools or additional mounting components.<\/li>\n
            • Requires no extra space in the control cabinet and simplifies system wiring.<\/li>\n<\/ul>\n
              <\/div>\n<\/li>\n
            • \n
              System Diagnostics<\/strong><\/div>\n
              <\/div>\n
                \n
              • Integrates with the S7\u20111200 CPU diagnostic system for status monitoring and fault detection.<\/li>\n
              • Supports automatic module recognition by the controller for fast commissioning.<\/li>\n<\/ul>\n
                <\/div>\n<\/li>\n<\/ol>\n
                <\/div>\n

                Technical Features<\/h2>\n
                <\/div>\n
                \n
                \n
                \u8868\u683c<\/div>\n
                \n
                <\/div>\n
                <\/div>\n
                <\/div>\n<\/div>\n<\/div>\n
                \n
                \n
                \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
                Product Model<\/td>\n6ES7221-3AD30-0XB0<\/td>\n<\/tr>\n
                Product Series<\/td>\nSIMATIC S7\u20111200, SB 1221 Signal Board<\/td>\n<\/tr>\n
                Module Type<\/td>\nDigital Input Signal Board<\/td>\n<\/tr>\n
                Number of Input Channels<\/td>\n4 channels<\/td>\n<\/tr>\n
                Nominal Input Voltage<\/td>\n24 V DC<\/td>\n<\/tr>\n
                Input Delay<\/td>\nIntegrated hardware filtering<\/td>\n<\/tr>\n
                Isolation<\/td>\nNon-isolated (CPU-integrated signal board)<\/td>\n<\/tr>\n
                Operating Voltage<\/td>\nSupplied by S7\u20111200 CPU internal logic<\/td>\n<\/tr>\n
                Operating Temperature<\/td>\n0 \u00b0C to +60 \u00b0C<\/td>\n<\/tr>\n
                Storage Temperature<\/td>\n-40 \u00b0C to +70 \u00b0C<\/td>\n<\/tr>\n
                Relative Humidity<\/td>\n10% \u2013 95% non-condensing<\/td>\n<\/tr>\n
                EMC Compliance<\/td>\nEN 61131\u20112, EN 61000\u20116\u20112, EN 61000\u20116\u20114<\/td>\n<\/tr>\n
                Protection Class<\/td>\nIP20<\/td>\n<\/tr>\n
                Installation<\/td>\nDirectly plugged onto S7\u20111200 CPU<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
                <\/div>\n

                Product Dimensions<\/h2>\n
                <\/div>\n
                  \n
                • Width: 19 mm<\/li>\n
                • Height: 62 mm<\/li>\n
                • Depth: 40 mm<\/li>\n
                • Extremely compact dimensions designed specifically for CPU-mounted expansion<\/li>\n<\/ul>\n
                  <\/div>\n

                  Weight<\/h2>\n
                  <\/div>\n
                    \n
                  • Net weight: Approximately 0.02 kg<\/li>\n
                  • Gross weight (with packaging): Approximately 0.04 kg<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

                    Siemens 6ES7221-3AD30-0XB0 Digital Input SB 1221 Product Overview The Siemens 6ES7221-3AD30-0XB0 is a SB 1221 digital input signal board designed<\/p>","protected":false},"featured_media":5990,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[111],"product_tag":[],"class_list":["post-5989","product","type-product","status-publish","has-post-thumbnail","product_cat-siemens","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"\nSiemens 6ES7 221-3AD30-0XB0 DIGITAL INPUT SB 1221 6ES7221-3AD30-0XB0 - Autofits<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atfits.com\/es\/producto\/siemens-6es7-221-3ad30-0xb0-digital-input-sb-1221-6es7221-3ad30-0xb0\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Siemens 6ES7 221-3AD30-0XB0 DIGITAL INPUT SB 1221 6ES7221-3AD30-0XB0 - 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