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heroicons/solid/check Over 300,000 products in stock
heroicons/solid/check Worldwide delivery
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heroicons/solid/check New & refurbished 2 years warranty

Siemens 6ES7421-5EH00-0AA0

SIMATIC S7-400, DIGITAL INPUT SM 42
Condition
How does requesting a repair work?
  1. Add the repair to your cart and complete your order
  2. You'll receive an RMA form by email
  3. Pack your product with the RMA form and send it to us
  4. We repair and test it, then return it in ~2 weeks
+ £250.00
Excl. Tax:
Need more?

Need something we currently don't have available? Our sourcing team can help you find what you need

SIMATIC S7-400, DIGITAL INPUT SM 421, OPTIC. ISOLATED, 16 DI, 120 V AC, WITH 1 COMMON POINT

The SIMATIC S7-400 DIGITAL INPUT SM 421 module exemplifies advanced technology in the electrical sector.

Designed for optimal performance, this optically isolated module provides 16 digital inputs operating at 120 V AC, ensuring versatility and reliability in various automation applications.

Manufactured by Siemens in Germany, the SM 421 module is a vital component for industries seeking to enhance their control systems.

Despite being phased out since 2004, this product maintains a strong legacy, offering outstanding functionality for existing systems.

The compact dimensions of 23.30 x 30.20 x 3.70 make it suitable for integration into tight spaces, while its robust design ensures durability in demanding environments.

Businesses invested in upgrading their automation infrastructure will find the SIMATIC S7-400 to be an essential element that combines reliability with proven technology.

General
Manufacturer:
Siemens
Brands:
SIEMENS
Range:
SIMATIC S7
Subrange:
S7-400
Type of product:
Digital modules
PLM
Product phase:
Obsolete
Logistics
Dimensions:
23,30 x 30,20 x 3,70
Weight:
1.85lbs
Commodity Code:
85389091
ECCN number:
N
When you choose JCertified refurbished electronics, you save on water, raw materials, and CO₂ needed for the production of new electronics. Check below to see exactly how much you save with this specific refurbished product:
CO2 eq
-72%
Resource use minerals and metals
-95%
Water use
-83%
How do I order a product or repair online?
First, find your product in the webshop. On the product page, you can add the product or repair to your shopping cart. Then proceed to checkout. 
Why should I choose JC-Electronics?
You can rely on a stock of 300,000 pieces of industrial electronics from leading top-quality brands, both new and refurbished. Therefore, you can also find drives, PLCs, HMIs, and industrial PCs that are no longer produced with us. You always get a 2-year warranty. Additionally, refurbished products are circular, helping you reduce your ecological footprint.  Good to know: New products and tested refurbished products ordered before 16:00 CET are shipped the same day.
Why can I trust refurbished electronics from JC-Electronics?
All products are thoroughly cleaned, defects are repaired, and weak elements are proactively replaced. If they pass the endurance test, the products can be sold. You can recognize them by the JCertified warranty seal. The entire process has received the RecQ quality mark from DEKRA and the ISO14001:2015 certificate
How much warranty do I get on a product?
You always get a 2-year warranty on products, both refurbished and new. This is twice as much as the standard factory warranty from many manufacturers.
Are all products available from stock immediately?
New and tested refurbished products from our stock are always available immediately. Untested and non-refurbished products undergo a thorough refurbishment and an extensive testing procedure before shipment.
Can I order products urgently?
Yes, you can. New and refurbished products that are ready for shipment will be dispatched the same day if the order is received before 16:00 CET. An express shipment to the Netherlands, Belgium, Luxembourg, Germany, Austria, Switzerland, France, or Italy will arrive the next day. An express shipment to other countries in the European Union takes 2 days. An express shipment to countries outside the European Union takes 3 days. 
Why should I buy refurbished electronics?
There are several reasons to purchase a refurbished product. For example, because electronics are no longer made and are hard to get new. But also because refurbished is a sustainable choice, reducing your organization's ecological footprint. Whatever the reason, you always get a 2-year warranty on both refurbished and new electronics at JC-Electronics. 
How much are transport costs?
Transport costs are usually included in the price. There are a few exceptions. Check the overview of all transport costs.