Description
Description
The Siemens 6ES5947-3UR21 is a high-performance central processing unit (CPU) module belonging to the SIMATIC S5 automation system family. Specifically designated as the CPU 947R, this processor module is engineered for demanding industrial control environments requiring reliable logic processing and system management. As a legacy component, it remains a critical spare for maintaining existing S5-based infrastructures.
Features
- Designed for integration within the SIMATIC S5 programmable logic controller architecture.
- Robust processing capabilities suitable for complex automation tasks.
- Engineered for high-availability configurations within industrial control systems.
- Legacy support for established manufacturing and process control installations.
Technical Specifications
| Manufacturer |
Siemens |
| Model Number |
6ES5947-3UR21 |
| Module Type |
CPU 947R Processor |
| Product Family |
SIMATIC S5 |
| Status |
Discontinued by Manufacturer |
| Alternative/Replacement |
CPU 948R |
| Tariff Code |
8537109060 |
Installation Guidelines
- Ensure the power supply is completely disconnected before attempting to install or remove the CPU module from the rack.
- Handle the module using proper ESD (electrostatic discharge) precautions to prevent damage to sensitive internal circuitry.
- Verify that the module is correctly seated in the designated slot and that all locking mechanisms are fully engaged to ensure a stable electrical connection.
- Ensure that the control cabinet provides adequate ventilation to maintain operating temperatures within the specified range, preventing overheating.
- Check all backplane connections for debris or oxidation before installation to ensure reliable communication across the S5 bus.
FAQ
Is the Siemens 6ES5947-3UR21 still being manufactured?
No, this model has been officially discontinued by Siemens. It is currently sought after as a spare part for the maintenance and repair of legacy SIMATIC S5 systems.
What is the recommended replacement for this unit?
The CPU 948R is often cited as a functional alternative or replacement for the 947R series. We recommend consulting your specific system documentation or a qualified systems engineer to verify compatibility with your existing application code and hardware configuration.
