Siemens SIMATIC S5 Digital Input Module 6ES5430-4UA14

Description

The 6ES5430-4UA14 is a digital input module for the Siemens SIMATIC S5 family of programmable logic controllers. It provides 32 floating digital inputs with a nominal voltage of 24V DC. This module is essential for maintaining and extending the operational life of legacy S5-115U/H/F, S5-135U, and S5-155U/H automation systems, allowing for reliable signal acquisition from sensors, switches, and other field devices.

Specifications

• Manufacturer: Siemens
• Product Line: SIMATIC S5
• Model: 6ES5430-4UA14
• Product Type: Digital Input Module
• Number of Inputs: 32
• Input Voltage: 24V DC
• Isolation: Floating (potential isolation)
• Input Delay: typ. 3 ms
• Compatibility: S5-115U/H/F, S5-135U, S5-155U/H

Label Info

• Part Number: 6ES5430-4UA14
• Version: 03

Application

This module is used in various industrial automation applications to read binary control signals in legacy machines and production lines controlled by the Siemens S5 PLC system.

Country of Origin

Made in Germany.

CO2 Impact

By reusing this industrial part, you are contributing to a more sustainable future. This single item avoids the emission of approximately 24 kg of CO2 that would be required for the production of a new one.

Availability

This product is a discontinued but available spare part. Limited stock. Order now from PLC2Day for expert support and fast delivery.

FAQ

Is this module compatible with all SIMATIC S5 CPUs?

No, it is specifically designed for the S5-115U/H/F, S5-135U, and S5-155U/H systems. It is not compatible with smaller systems like the S5-95U or S5-100U.

What front connector is required for this module?

This module requires a 48-pin front connector for wiring, such as the Siemens part number 6ES5491-0LB11.

What does 'floating' input mean for this module?

Floating, or potential isolation, means that the input channels are electrically isolated from the S5 backplane bus, which enhances noise immunity and protects the PLC from ground loop issues.

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Last Update: Friday, March 13, 2026