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Siemens SIMATIC S7-400 SM 421 Digital Input Module - 16 DI, 24V DC, 0.05ms Delay

Name: Siemens 6ES7421-7BH01-0AB0
Brand: Siemens
SKU: 6ES7421-7BH01-0AB0
Availability: InStock

Siemens S7-400 SM 421 digital input module, 16 DI, 24V DC, 0.05ms delay.

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

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ManufacturerSiemens

Part number6ES7421-7BH01-0AB0

Inputs 16 DI

Voltage 24V DC

Delay 0.05 ms

Functions Alarm, Diagnostics

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Response within 1 business hour

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12-month warranty

All units tested

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Same-day dispatch

Order by 2pm CST

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Worldwide delivery

US, EU, Asia, Middle East

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Veteran-owned

CAGE: 9NK75

16 Digital Inputs 24V DC Operation 0.05ms Input Delay Enhanced Diagnostics Alarm Functions High-Speed Response

Product description

The Siemens SIMATIC S7-400 SM 421 module (6ES7421-7BH01-0AB0) offers 16 optically isolated digital inputs for 24V DC signals with a faster 0.05ms input delay. It includes advanced alarm and diagnostics capabilities for enhanced system monitoring and troubleshooting.

This module is ideal for high-speed automation and applications demanding precise signal timing. Its enhanced performance and diagnostic features make it suitable for critical control loops in manufacturing, assembly lines, and motion control systems.

Stanlo Automation, a veteran-owned surplus distributor, provides access to the Siemens 6ES7421-7BH01-0AB0. Source your essential automation components from us for reliable performance and competitive pricing.

Technical specifications

Inputs	16 DI
Voltage	24V DC
Delay	0.05 ms
Functions	Alarm, Diagnostics
Isolation	Optical
Series	SIMATIC S7-400 SM 421

Common applications

High-Speed Automation

Precision Control

PLC Inputs

Machine Safety

Industrial Automation

Compatible systems

SIMATIC S7-400 PLC Systems

Also known as

Siemens S7-400 Fast Input SM 421 16DI 0.05ms 6ES74217BH010AB0

Replaces / compatible with

This module is an upgraded replacement for Siemens S7-400 digital input modules with 24V DC inputs, offering faster response times. It's compatible with the S7-400 system.

Technical note

Expert tip

The 6ES7421-7BH01-0AB0's faster input delay makes it suitable for synchronizing high-speed events within the S7-400 control system.

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Frequently asked questions

What is the primary advantage of the 0.05ms input delay on the Siemens 6ES7421-7BH01-0AB0 module?

The 0.05ms input delay allows the Siemens 6ES7421-7BH01-0AB0 module to react much faster to discrete input changes compared to modules with longer delays. This is crucial for high-speed applications where precise timing is essential.