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Siemens 6ES7421-1BL01-0AA0

Name: SIMATIC S7-400 SM 421 Digital Input Module
Brand: Siemens
SKU: 6ES7421-1BL01-0AA0

SIMATIC S7-400 SM 421 Digital Input Module

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Product Description

RoHS CompliantLifecycle Status:

The SIMATIC S7-400 SM 421 Digital Input Module is a high-performance component designed for industrial automation applications. It offers optically isolated digital inputs, providing robust protection against electrical noise and interference. The module supports up to 32 digital inputs, making it suitable for complex control systems that require extensive input handling.

Powered by a 24 V DC supply, this module ensures reliable operation in various industrial environments. Its compact design and advanced isolation technology make it an ideal choice for applications where safety and reliability are paramount.

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Offer details

Offer from:: Trusted supplier — Poland, member since 2023, 50–99 employees
Availability:: 34 pcs.
In-Stock
Updated at: 21-09-2026
Warranty:: 24 months
Condition:: Refurbished

Refurbished - A refurbished item inspected, cleaned, and repaired to full working order by either the manufacturer or a certified technician. The item is in excellent condition and fully operational.

The Seller is responsible for shipping the product and invoicing

Specifications

Brand: Siemens
Redundancy
Number of digital inputs: 32
Number of digital outputs: 0
Type of digital output: None
Input current at signal 1: 7 A
Permitted voltage at input: -30 V

Available Offers

(50)

Condition	Availability	Supplier	Warranty
Condition Refurbished	Availability 34 pcs. In-Stock Updated at: 21-09-2026	Supplier PolandTrusted supplier — member since 2023, 50–99 employees	Warranty 24 months
Condition Refurbished	Availability 40 pcs. In-Stock Updated at: 15-09-2026	Supplier GermanyTrusted supplier — member since 2024	Warranty 24 months
Condition New Surplus	Availability 11 pcs. In-Stock Updated at: 15-09-2026	Supplier GermanyTrusted supplier — member since 2024	Warranty 24 months
Condition Used	Availability 11 pcs. In-Stock Updated at: 10-03-2026	Supplier GermanyTrusted supplier — member since 2022	Warranty 1 month
Condition Used	Availability 2 pcs. In-Stock Updated at: 10-03-2026	Supplier GermanyTrusted supplier — member since 2022	Warranty 1 month
Condition Used	Availability 6 pcs. In-Stock Updated at: 10-03-2026	Supplier GermanyTrusted supplier — member since 2022	Warranty 1 month

Offer with manufacturer lead time

Directly from the manufacturer - with a confirmed, predictable, and fully transparent delivery time.

Documents

Data Sheet

Datasheet for Siemens 6ES7421-1BL01-0AA0, including specifications and features.

Download Data Sheet

CAD Models

3D CAD model and technical drawings, ready for your design software.

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Product data updated: 21-09-2026

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