Siemens | Simatic S5 6ES5420-4UA12

Product Details

• Part Number 1 6ES5420-4UA12

Product Description

Siemens 6ES5420-4UA12 is a Digital Input Module for the Simatic S5 product family.

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. Maintenance planning should reference the installed hardware configuration.

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. Its role should remain distinct from that of similarly named assemblies.

In the signal path, this approach helps preserve the intended system function while keeping selection aligned with the documented ratings, capacity, and compatibility requirements. The surrounding rack and module arrangement should be reviewed before installation.

Product Documentation

• Common Part Typos 6ES5420-4UAI2, 6ES5420-4UAl2, 6ES54204UA12, 6ES54204UAI2, 6ES54204UAl2, 6ES542O-4UA12, 6ES542O4UA12

Reviews

5.0 Rating

"Been doing business with the DCS Center for years. Quick responses, solid repairs and excellent follow-up support!"

- Alex L., United States

"Frank, you're a Rock Star! Thank you for the quick response, and great customer service, very refreshing these days! Great pricing"

- Charles, Ontario, Canada

"We received the 6ES7141-1BF12-0XB0 module yesterday - thank you very much! We will probably order another one next week. Thanks"

- George C., United States

"Dear Frank and James, This morning we tested the "new" IEPAF01 cards. Everything is fine!!! I want to express my thanks and my personal acknowledgement on how you..."

- Carmelo I., Italy

"Frank, we are very happy with your service. Our test mechanic has checked the controllers, they all are good!"

- Tony N., United States

"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