Siemens SIMATIC S5 CPU 942

Description

This is a Central Processing Unit (CPU), model CPU 942, for the Siemens SIMATIC S5-115U automation system. Part number 6ES5 942-7UA12 is a reliable and powerful processor designed for demanding industrial control tasks. As a legacy component, it is perfect for spare parts and maintaining existing S5-115U installations, ensuring continued operation and stability.

Specifications

• Manufacturer: Siemens
• Product Series: SIMATIC S5
• System Compatibility: S5-115U
• Module Type: Central Processing Unit (CPU)
• Model: CPU 942
• Part Number: 6ES5 942-7UA12

Label Info

• E-Stand (Firmware): 04

Application

The CPU 942 is used as the central controller in a SIMATIC S5-115U PLC rack. It executes the user program and controls all other modules in the system, making it suitable for a wide range of applications in manufacturing, process control, and automation.

Country of Origin

Made in Germany.

CO2 Impact

Opting for a refurbished unit like this one prevents the emission of approximately 60 kg of CO2 compared to manufacturing a new one, contributing to a more sustainable industrial environment.

Availability

This is an obsolete item but available from our stock. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?
What is the significance of the "E-Stand: 04" on this CPU?

Answer:
The "E-Stand" or firmware version is crucial for compatibility. It determines the feature set and compatibility with other S5 modules and STEP 5 programming software versions. Always ensure the E-Stand matches the requirements of your existing system to avoid operational issues.

Question?
Can I program this CPU 942 with TIA Portal?

Answer:
No, this is a legacy SIMATIC S5 CPU. It must be programmed using the older STEP 5 software. TIA Portal is designed for the modern SIMATIC S7 series (S7-1200, S7-1500, etc.) and is not backward compatible with S5 hardware.

Question?
What kind of memory module does this CPU use?

Answer:
The S5-115U CPUs like the 942 use plug-in memory submodules, typically EPROM or EEPROM types. The specific submodule part number depends on the required memory capacity for your application program. This CPU is sold without a memory submodule.

Last Update: Friday, March 13, 2026

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