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Siemens SIMATIC S7-400 SM 421 Digital Input Module - 16 DI, UC 120/230V

Name: Siemens 6ES7421-1FH20-0AA0
Brand: Siemens
SKU: 6ES7421-1FH20-0AA0
Availability: InStock

Siemens S7-400 SM 421 digital input module, 16 DI, UC 120/230V.

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ManufacturerSiemens

Part number6ES7421-1FH20-0AA0

Inputs 16 DI

Voltage UC 120/230V

Standard IEC 1131-2 Type 2

Series SIMATIC S7-400 SM 421

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12-month warranty

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16 Universal Voltage Inputs 120-230V AC/DC IEC 1131-2 Type 2 Compliance High Input Impedance S7-400 Integration

Product description

The Siemens SIMATIC S7-400 SM 421 module (6ES7421-1FH20-0AA0) features 16 digital inputs designed for universal voltage (UC) operation between 120V and 230V. It adheres to IEC 1131-2 Type 2 standards for input characteristics, ensuring reliable signal acquisition across various AC/DC sources.

This module is ideal for applications requiring flexibility in input voltage, particularly in international installations or where signal sources may vary. It's suitable for industries like general manufacturing, material handling, and process automation where 120-230V AC/DC signals are common.

Stanlo Automation, your veteran-owned source for surplus industrial parts, offers the Siemens 6ES7421-1FH20-0AA0. We provide reliable and cost-effective solutions for your automation needs.

Technical specifications

Inputs	16 DI
Voltage	UC 120/230V
Standard	IEC 1131-2 Type 2
Series	SIMATIC S7-400 SM 421

Common applications

Industrial Automation

Machine Control

PLC Input Modules

Global Installations

Process Automation

Compatible systems

SIMATIC S7-400 PLC Systems

Also known as

Siemens S7-400 Universal Input SM 421 16 DI IEC 2 6ES74211FH200AA0

Replaces / compatible with

This module can replace Siemens S7-400 digital input modules that support universal voltage inputs. It integrates seamlessly into the S7-400 system for compatibility.

Technical note

Expert tip

The IEC 1131-2 Type 2 specification ensures consistent input behavior for the 6ES7421-1FH20-0AA0, even with noisy or fluctuating signal sources within its voltage range.

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Frequently asked questions

What does 'UC 120/230V' and 'IEC 1131-2 Type 2' mean for the Siemens 6ES7421-1FH20-0AA0?

UC 120/230V indicates the module accepts input signals ranging from 120V to 230V AC or DC. IEC 1131-2 Type 2 compliance specifies the module's behavior and performance characteristics according to the international standard for programmable controller inputs.