6ES7421-7DH00-0AB0 SIEMENS Exclusive Digital Input SM 421 Original Brand New

6ES7421-7DH00-0AB0 SIEMENS Exclusive Digital Input SM 421 Original Brand New

The 6ES7421-7DH00-0AB0 is a high-performance digital input module from SIEMENS, specifically engineered for the SIMATIC S7-400 automation system. This SM 421 module provides 16 isolated digital inputs, supporting a voltage range from 24 V to 60 V UC. Designed for critical industrial automation tasks, it features integrated alarm and diagnostic functions that ensure smooth operation and effective error management. This robust and compact module supports connection with standard switches and 2-wire proximity sensors (BEROs), making it a versatile solution for a wide range of industrial applications.

The SM 421 digital input module is engineered with efficiency and reliability in mind. The isolated inputs improve signal integrity and protect internal circuits from electrical disturbances. It ensures fast diagnostics and real-time monitoring through visual indicators and internal signaling systems. This module enhances system availability and facilitates easy replacement during maintenance operations.

Overview

• Digital input module for SIMATIC S7-400 systems
• Supports connection of switches and 2-wire proximity sensors (BEROs)
• Voltage range: UC 24 – 60 V
• Integrated alarm and diagnostic functionalities

Design

• Compact housing with robust plastic enclosure
• Green LEDs for indicating input signal states
• Red LEDs for signaling internal and external faults
• Includes labeling strips for easy channel identification
• Plug-in front connector for simplified and user-friendly wiring
• Easy assembly suitable for industrial cabinet installations

Download

Data Sheet (PDF)

Product Code: 6ES7421-7DH00-0AB0

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