Siemens SIMATIC S5 Coordinator Module 6ES5923-3UC11

Description

This is the Siemens 6ES5923-3UC11, an IP 244B Interprocessor Communication Processor, also known as a Coordinator module, for the legacy SIMATIC S5 automation system. It is designed to facilitate seamless data exchange and synchronization between multiple S5 PLC controllers, making it a critical component for complex, distributed control applications. This module is essential for maintaining and repairing existing S5 installations.

Specifications

• Manufacturer: Siemens
• Product Family: SIMATIC S5
• Part Number: 6ES5923-3UC11
• Function: Coordinator / IP 244B Interprocessor Communication
• Compatibility: S5-115U/H, S5-135U, S5-155U/H
• Version (E-Stand): 09

Label Info

• Board ID: PC 612 F B116
• UL/CSA Certified

Application

This module is used in industrial automation environments running on the Siemens SIMATIC S5 platform. It is typically applied in manufacturing plants, process control systems, and machine building where multiple PLCs need to be linked for coordinated control tasks.

Country of Origin

Germany

CO2 Impact

By choosing this pre-owned module, you are contributing to the circular economy and avoiding the production of a new one. This saves an estimated 20 kg of CO2, which is equivalent to the emissions from driving a car for 100 kilometers.

Availability

This is an obsolete item, but it is available from our stock as a replacement part for existing systems. The item is used, tested, and comes in its original packaging. Order now from PLC2Day for expert support and fast delivery.

FAQ

The IP 244B (6ES5923-3UC11) is designed for inter-processor communication. It allows multiple SIMATIC S5 CPUs to exchange data over a dedicated network, enabling them to work together in a coordinated fashion for large or complex automation tasks.

No, this module is specifically designed for the S5-115U/H, S5-135U, and S5-155U/H series of central processing units. It is not compatible with smaller S5 systems like the S5-90U or S5-100U.

For new systems or complete upgrades, the functionality of this module is replaced by communication processors (CPs) within the modern SIMATIC S7-1500 family, typically utilizing Profinet or Profibus for high-speed data exchange between controllers. A direct drop-in replacement does not exist; migration requires re-engineering the system architecture.

Last Update: Friday, March 13, 2026

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