Siemens | Simatic S5 6ES5420-1AA21

Siemens Simatic S5 Digital Input/Output Module (6ES5420-1AA21).

Stock Status
Available Now

Warranty

DCS Center Warranty Included

Shipping

Worldwide shipping via DHL, UPS, and Fedex

Repair Time

3-5 weeks. Rush Repair options are available.

Product Details

  • Part Number 1 6ES5420-1AA21

Product Description

Within the Simatic S5 product line, Siemens 6ES5420-1AA21 serves as a Digital Input/Output Module.

From a maintenance perspective, digital input hardware creates the path from field-level status signals to control logic, allowing the system to evaluate operating conditions and respond through configured sequences or protective actions. The installed revision should be confirmed before the product is applied.

In a SIMATIC S5 system, module selection is governed by the controller family, rack arrangement, electrical interface, and configured program. The exact article number should be matched before installation. The assigned system function should be preserved through installation and service.

In the signal path, this approach helps preserve the intended system function while keeping selection aligned with the documented ratings, capacity, and compatibility requirements. Application should remain aligned with the documented system design.

Product Documentation

  • Common Part Typos 6ES5420-1AA2I, 6ES5420-1AA2l, 6ES5420-IAA21, 6ES5420-lAA21, 6ES54201AA21, 6ES54201AA2I, 6ES54201AA2l, 6ES5420IAA21, 6ES5420lAA21, 6ES542O-1AA21, 6ES542O1AA21

Reviews

5.0 Rating

"Hi Frank and thank you for your quick response - good service. We look forward to doing more business with DCS"

- Serge, United States

"Thank you very much for your prompt and professional assistance!"

- Brent M., United States

"Frank your customer service has been excellent, you go out of your way to help and support. Your response and feedback is exceptional, its a pleaure to engage..."

- Selva Moodley, South Africa

"I would like to say thanks a lot for all. I’ve had good service with you and it’s a pleasure"

- Audrey, Québec, Canada

"We received the cables Frank. They are in great shape, including the connectors. Thanks for the good service."

- Larry A., United States

"Ahoy! We are extremely pleased with the cost effective and rapid repair services provided DCS Center. Even though the ship is only 12 years old, many of the..."

- Birdman Chief Engr., United States

Manufacturer Affiliation Disclaimer

DCS Center sells new surplus and reconditioned products. This website is not sanctioned or approved by any manufacturer or tradename listed. DCS Center is not an authorized distributor or representative for the listed manufacturers. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.

Need Assistance or Parts?

Keep your operation moving with fast access to the DCS and PLC components you need. Whether you are searching for a hard-to-find part, need a repair, or want help identifying the right replacement, DCS Center is here to simplify the process and minimize downtime.

Contact Us
Siemens 6ES72111HD300XB0 Simatic S7 PLCs PLC Modules
You're viewing: 6ES5420-1AA21
Add to Quote