6ES7421-1BL01-0AA0 SIEMENS Exclusive Digital Input Module SM421 Original Brand New

6ES7421-1BL01-0AA0 SIEMENS Exclusive Digital Input Module SM421 Original Brand New

The 6ES7421-1BL01-0AA0 by SIEMENS is a high-performance digital input module from the SIMATIC S7-400 series. Featuring 32 isolated digital inputs operating at 24 V DC, this SM 421 module is designed for robust industrial automation tasks. It enables seamless connection of switches and 2-wire proximity sensors (BEROs), offering reliable signal acquisition in harsh environments. Its rugged housing and diagnostic capabilities make it an ideal choice for scalable control systems within manufacturing and processing applications.

Equipped with status LEDs for each channel, the module ensures easy signal monitoring and quick fault identification. Diagnostic and process interrupt capabilities provide additional safety and response measures for critical industrial systems. The plug-in front connector design ensures user-friendly wiring and simplified integration into existing systems. Whether upgrading or expanding an S7-400 configuration, this digital input module delivers reliable performance, consistent quality, and trusted SIEMENS engineering.

Overview

• Digital inputs designed for the SIMATIC S7-400 series
• Supports connection of standard switches and 2-wire proximity sensors (BEROs)
• Ideal for industrial automation and input signal acquisition

Design

• Compact and durable plastic housing for industrial use
• Green LEDs indicate signal state for each input channel
• Red LEDs highlight internal and external faults for diagnostics
• Labeling strips provided for clear identification
• Simple, fast assembly with plug-in front connector system

Product Code: 6ES7421-1BL01-0AA0

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