I/O modules

Product Overview

The Siemens 6ES7421-1BL00-0AA0 is a SM 421 digital input module for SIMATIC S7-400 systems. Moreover, it provides 32 optically isolated digital inputs, which allow the controller to process signals accurately in 24 V DC industrial applications. In addition, optical isolation enhances signal integrity and protects the system from electrical interference.

Key Features

This module delivers reliable performance and precise digital input handling:

• 32 optically isolated digital inputs for high-accuracy signal acquisition
• 24 V DC input voltage, compatible with standard industrial controllers
• Optical isolation ensures strong noise immunity and operational stability
• Compact design enables efficient installation within S7-400 racks
  Therefore, it suits high-reliability automation applications where signal integrity matters.

Technical Specifications

Typical Applications

The 6ES7421-1BL00-0AA0 module integrates smoothly in industrial automation systems:

• PLC Systems: Collects digital inputs efficiently in SIMATIC S7-400 environments
• Process Control: Monitors signals reliably while maintaining accuracy
• Automation Environments: Protects inputs from electrical noise using optical isolation
  Moreover, it supports continuous operation in demanding industrial conditions, providing system stability.

FAQ

Q1: Is this Siemens 6ES7421-1BL00-0AA0 module original and new?
Yes, it is 100% Siemens original, in stock, and ships within 3 days–2 weeks depending on order size.

Q2: What voltage range does this module support?
It supports 24 V DC signals, which are standard for industrial digital inputs.

Q3: Which logistics and returns are available?
We ship via DHL or FedEx, and you can return the module within 30 days for quality issues.

Details