Cookie Settings

To use these Services, we need your consent. By clicking on “Accept all”, you declare your consent to the use of all Services. You can also declare your consent by individually clicking on the sliders for each category of cookies and save.

Learn more arrow-right
Necessary cookies

Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.

Statistic cookies

Statistic cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.

Preferences cookies

Preference cookies enable a website to remember information that changes the way the website behaves or looks, like your preferred language or the region that you are in.

Marketing cookies

Marketing cookies are used to track visitors across websites. The intention is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers.

We use our own cookies as well as third-party cookies on our websites to enhance your experience, analyze our traffic, and for security and marketing. Select "Accept All" to allow them to be used. Read our Cookie Policy.

6ES5921-3UA12

i
Need more units?

We will support you, please fill in this

Transport and Handling Information

The transportation costs depend on the destination, purchase price, weight, shipping speed, and whether it is a pallet order.

Express shipping and rush orders

With express shipping, the product is delivered faster. For products that are not yet ready for shipping, you can place a rush order. These products still need to be revised.

A rush order is ready for shipping within 2 business days and can then be shipped express. This can be selected during checkout.

Condition
or
wrench Repair
Select service ( €422.00 )

Description for 6ES5921-3UA12

SIMATIC S5, CPU 921 CENTRAL CONTROLLER MODULE F. CC 135U

The Siemens 6ES5921-3UA12 is a central controller module designed for the SIMATIC S5 automation system, specifically for the CC 135U configuration. This module provides reliable and robust control for industrial production lines, making it suitable for demanding manufacturing environments. The 6ES5921-3UA12 is constructed with high-quality materials to ensure long-term performance and stable operation within automated processes. Its compact design allows for easy integration into existing control cabinets and systems, streamlining upgrades and maintenance tasks for project managers and production leaders.

  • Brand: Siemens
  • Large inventory for rapid delivery ensures minimal downtime for the 6ES5921-3UA12
  • Available as a refurbished product with a standard two-year warranty, supporting sustainability and reliability
  • Particularly suited for replacement or expansion within SIMATIC S5 systems, the 6ES5921-3UA12 meets industry standards for quality and performance

The Siemens 6ES5921-3UA12 is engineered for straightforward installation and is compatible with a wide range of automation applications. This controller module offers dependable performance, contributing to the efficient operation of production processes. For organizations aiming to maintain or upgrade their existing SIMATIC S5 installations, the 6ES5921-3UA12 is a practical and trustworthy solution.

JC-Electronics is not an official authorized distributor for Siemens. The original manufacturer's warranty does not apply. Instead, we offer you a 2-year warranty according to our JCertified guidelines.

Positive Results

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%

Specifications

Manufacturer:
Siemens
Range:
Simatic S5
Subrange:
S5-135/155
Type of product:
Controllers
Product phase:
Obsolete
Dimensions (cm):
24,50 x 18,00 x 2,00
Weight:
0.55kg
Commodity Code:
85371091
Export Control Regulations (ECCN):
N

Product Questions (8)

Can I buy on account at JC-Electronics?
Yes, under certain conditions. Contact the Sales team via sales@jc-electronics.com for more information.
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. 
Can I have products repaired urgently?
 Yes, you can. With an urgent repair, your product will be repaired within 3 working days. Contact the Sales team via sales@jc-electronics.com for this.
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. 
We found other products you might like!
Navigating through the elements of the carousel is possible using the tab key. You can skip the carousel or go straight to carousel navigation using the skip links.
6ES5760-1AA11
6ES5760-1AA11
SIMATIC S5, Terminating connector f
As low as €95.00 (Excl. Tax)

check In stock

6ES5922-3UA11
6ES5922-3UA11
SIMATIC S5 CENTRAL CONTROLLER MODUL
As low as €580.00 (Excl. Tax)

check In stock

6ES5923-3UA11
6ES5923-3UA11
SIMATIC S5 923A COORDINATOR F. CC 1
As low as €170.00 (Excl. Tax)

check In stock

6ES5760-0HA11
6ES5760-0HA11
SIMATIC S5 TERMINATING RESISTOR CON
As low as €132.00 (Excl. Tax)

check In stock

6ES5921-3UA12