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      6ES7221-1BF22-0XA0

      Digital Input Module

      Product Information

      Product Describe

      SIMATIC S7-200, DIGITAL INPUT

      EM 221, FOR S7-22X CPU

      ONLY, 8 DI, 24V DC, SINK/SOURCE INPUT

      industrial automation system

      • Manufacturer:
        Siemens
      • Product Category:
        PLC System
      • Spare Part Number:
        EM221
      • Estimated shipping dimensions:
        10.2x7.6x7.6cm
      • Weight:
        0.1 kg
      • Tariff Code:
        8537101190
      • Country of origin:
        Germany
      • Place of shipment:
        Xiamen, Fujian, China
      • from backplane bus 5 V DC, max.:
        30 mA
      • Power loss, typ.:
        2 W
      • Number of digital inputs:
        8 inputs
      • Input current for signal:
        4 mA
      • Category Series:
        SIMATIC S7-200
      • Product Type:
        DIGITAL INPUT
      • Stock:
        20
      By purchasing this item, you agree to the Terms & Conditions
      Moore Automated is NOT an authorized distributor of Siemens
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          FAQ

          • What functional role does the 6ES7221-1BF22-0XA0 fulfill in a SIMATIC S7-200 automation architecture?
            The 6ES7221-1BF22-0XA0 serves as a dedicated 8-point digital input expansion module (EM 221) that extends the discrete input capability of a SIMATIC S7-22X CPU, enabling reliable acquisition of field-level DC logic signals within a modular PLC system.
          • How many digital input channels are integrated within the 6ES7221-1BF22-0XA0 and what is their electrical configuration?
            This module incorporates 8 digital inputs designed for sink/source (bidirectional) operation at 24 V DC, enabling flexible interfacing with a range of industrial sensor types.
          • What is the nominal voltage specification and logic threshold for the 6ES7221-1BF22-0XA0 inputs?
            The 6ES7221-1BF22-0XA0 is optimized for a rated input voltage of 24 V DC, with signal recognition thresholds of 0–5 V for logic ‘0’ and +15 V to +30 V for logic ‘1’ conditions.
          • What current consumption characteristics does the 6ES7221-1BF22-0XA0 exhibit?
            Input circuitry of the 6ES7221-1BF22-0XA0 draws a maximum of 30 mA from the 5 V backplane bus and approximately 4 mA per active input at the rated logic-1 voltage, making it suitable for energy-efficient distributed I/O expansion.
          • What is the typical power dissipation of the 6ES7221-1BF22-0XA0 module during operation?
            Under normal operating conditions, the 6ES7221-1BF22-0XA0 exhibits a typical power loss of approximately 2 W, contributing minimally to overall system thermal load.
          • What are the maximum permitted cabling distances supported by the 6ES7221-1BF22-0XA0?
            For robust field connectivity, the 6ES7221-1BF22-0XA0 supports shielded cables up to 500 m and unshielded cables up to 300 m, facilitating flexible system wiring in large control panels or plant zones.
          • What mechanical form factor and termination scheme does the 6ES7221-1BF22-0XA0 utilize?
            Mechanically, the 6ES7221-1BF22-0XA0 features plug-in I/O terminals for secure field wiring, and compact dimensions supporting its integration in DIN-rail mounted PLC racks with minimal footprint.
          • Are there any noteworthy limitations or considerations when deploying the 6ES7221-1BF22-0XA0?
            The 6ES7221-1BF22-0XA0 does not provide onboard output channels, and its input wiring must conform to the rated voltage and current characteristics to avoid signal integrity issues. Additionally, external protective measures (e.g., transient suppression) should be considered in high-noise environments.

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