{"id":5981,"date":"2026-03-31T14:26:51","date_gmt":"2026-03-31T06:26:51","guid":{"rendered":"https:\/\/atfits.com\/?post_type=product&p=5981"},"modified":"2026-03-31T14:26:51","modified_gmt":"2026-03-31T06:26:51","slug":"siemens-6es7-221-1bh32-0xb0-digital-input-sm-1221-6es7221-1bh32-0xb0","status":"publish","type":"product","link":"https:\/\/atfits.com\/es\/producto\/siemens-6es7-221-1bh32-0xb0-digital-input-sm-1221-6es7221-1bh32-0xb0\/","title":{"rendered":"Siemens 6ES7 221-1BH32-0XB0 Digital input SM 1221 6ES7221-1BH32-0XB0"},"content":{"rendered":"

Siemens 6ES7221-1BH32-0XB0 Digital Input Module SM 1221<\/h1>\n
<\/div>\n

Product Overview<\/h2>\n
<\/div>\n
The Siemens 6ES7221-1BH32-0XB0 is a SM 1221 digital input module<\/strong> designed for the SIMATIC S7\u20111200 compact controller series. It expands the number of digital input channels for the S7\u20111200 CPU, enabling the controller to receive binary switching signals from field devices such as pushbuttons, limit switches, proximity sensors, indicator lights, and other two\u2011state industrial components. This module features a compact design, high noise immunity, and direct front\u2011plug installation, making it widely used in small and medium\u2011sized automation systems, machine building, material handling, and building control applications.<\/div>\n
<\/div>\n

Main Functions<\/h2>\n
<\/div>\n
    \n
  1. \n
    Digital Signal Acquisition<\/strong><\/div>\n
    <\/div>\n
      \n
    • Provides 16 channels of digital input to detect and process binary field signals.<\/li>\n
    • Converts external switching signals into logical states readable by the SIMATIC S7\u20111200 CPU.<\/li>\n<\/ul>\n
      <\/div>\n<\/li>\n
    • \n
      Signal Processing & Filtering<\/strong><\/div>\n
      <\/div>\n
        \n
      • Integrates input filtering to suppress electromagnetic interference and ensure stable signal detection.<\/li>\n
      • Supports adjustable input delay to avoid mis\u2011triggering caused by contact bounce or transient interference.<\/li>\n<\/ul>\n
        <\/div>\n<\/li>\n
      • \n
        Voltage Compatibility<\/strong><\/div>\n
        <\/div>\n
          \n
        • Operates with a 24 V DC nominal input voltage, compatible with most industrial sensors and standard field wiring.<\/li>\n
        • Supports both sourcing and sinking input wiring for flexible connection to different types of field devices.<\/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 display real\u2011time ON\/OFF status.<\/li>\n
          • Includes additional LEDs for power and module status to support quick on\u2011site diagnostics.<\/li>\n<\/ul>\n
            <\/div>\n<\/li>\n
          • \n
            Direct Expansion & Compatibility<\/strong><\/div>\n
            <\/div>\n
              \n
            • Plugs directly into the front of the S7\u20111200 CPU without tools for fast installation.<\/li>\n
            • Fully compatible with all SIMATIC S7\u20111200 CPUs and supports easy system expansion.<\/li>\n<\/ul>\n
              <\/div>\n<\/li>\n
            • \n
              Diagnostic Support<\/strong><\/div>\n
              <\/div>\n
                \n
              • Provides basic diagnostic feedback for power loss and module detection.<\/li>\n
              • Integrates with the S7\u20111200 system diagnostics for centralized monitoring and troubleshooting.<\/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\n
                Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
                Product Model<\/td>\n6ES7221-1BH32-0XB0<\/td>\n<\/tr>\n
                Product Series<\/td>\nSIMATIC S7\u20111200, SM 1221<\/td>\n<\/tr>\n
                Module Type<\/td>\nDigital Input Module<\/td>\n<\/tr>\n
                Number of Input Channels<\/td>\n16 channels<\/td>\n<\/tr>\n
                Nominal Input Voltage<\/td>\n24 V DC<\/td>\n<\/tr>\n
                Input Type<\/td>\nSourcing \/ sinking compatible<\/td>\n<\/tr>\n
                Input Delay<\/td>\nSoftware\u2011configurable filtering<\/td>\n<\/tr>\n
                Isolation<\/td>\nBasic channel\u2011to\u2011bus isolation<\/td>\n<\/tr>\n
                Operating Voltage<\/td>\n24 V DC system voltage<\/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\u2011condensing<\/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 (enclosure)<\/td>\n<\/tr>\n
                Installation<\/td>\nDirect front\u2011mount on 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: 45 mm<\/li>\n
                • Height: 100 mm<\/li>\n
                • Depth: 75 mm<\/li>\n
                • Compact form factor optimized for control cabinet space efficiency<\/li>\n<\/ul>\n
                  <\/div>\n

                  Weight<\/h2>\n
                  <\/div>\n
                    \n
                  • Net weight: Approximately 0.16 kg<\/li>\n
                  • Gross weight (with packaging): Approximately 0.20 kg<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

                    Siemens 6ES7221-1BH32-0XB0 Digital Input Module SM 1221 Product Overview The Siemens 6ES7221-1BH32-0XB0 is a SM 1221 digital input module designed<\/p>","protected":false},"featured_media":5982,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[111],"product_tag":[],"class_list":{"0":"post-5981","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-siemens","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"\nSiemens 6ES7 221-1BH32-0XB0 Digital input SM 1221 6ES7221-1BH32-0XB0 - 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-6es7-221-1bh32-0xb0-digital-input-sm-1221-6es7221-1bh32-0xb0\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Siemens 6ES7 221-1BH32-0XB0 Digital input SM 1221 6ES7221-1BH32-0XB0 - 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