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      Siemens 6ES7221-1BF22-0XA0
      Siemens 6ES7221-1BF22-0XA0
      Siemens 6ES7221-1BF22-0XA0
      Siemens 6ES7221-1BF22-0XA0
      Siemens 6ES7221-1BF22-0XA0
      Siemens 6ES7221-1BF22-0XA0

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      In Stock
      Digital Input Module

      6ES7221-1BF22-0XA0

      Spare Part Number

      PNEM221

      Product Information:

      SIMATIC S7-200, DIGITAL INPUT

      EM 221, FOR S7-22X CPU

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

      industrial automation system

      Product image is representative; revision or series may vary. Contact us to request a specific version.
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      Technical specifications for

      6ES7221-1BF22-0XA0

      0 TECHNICAL PARAMETERS
      • Manufacturer:
        Siemens
      • Product Category:
        PLC Systems
      • 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
      • Series:
        Siemens Simatic S7-200
      • Stock Availability:
        20
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      PRODUCT & ORDER FAQS

      Questions buyers ask about 6ES7221-1BF22-0XA0

      • 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.
      All FAQ
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          Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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