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Physical Foundation for the CP581 Communication Processor
The Siemens 6ES5581-0EA11 basic module, also known as the CP581 Grundbaugruppe, serves as the physical mounting base for the CP581 communication processor . This unit provides the mechanical support and electrical connections for the CP581 module within the S5-155U or S5-155H central rack . System integrators rely on this component for stable and reliable communication processor installation.
Technical Specifications and Physical Attributes
The Siemens 6ES5581-0EA11 integrates a DIN 41612 standard backplane connector with gold-plated contacts for low-resistance signal transmission . The module features a V0-rated high-strength flame-retardant engineering plastic housing combined with a metal backplane . This module is specifically designed for the S5-155U and S5-155H systems and serves as the dedicated mounting base for the CP581 (6ES558x series) .
| Parameter | Specification |
|---|---|
| Brand | Siemens |
| Model | 6ES5581-0EA11 |
| Product Type | Basic Module / Grundbaugruppe |
| Series | SIMATIC S5 |
| Target System | S5-155U, S5-155H central rack |
| Compatible Modules | CP581 (6ES558x series) |
| Connector Type | DIN 41612 backplane connector |
| Housing Material | V0 flame-retardant engineering plastic + metal backplane |
| Weight | Approx. 0.3 kg |
| Operating Temperature | -25°C to +70°C |
Design and Mechanical Stability
This basic module provides the mechanical backbone for the CP581 communication processor within the S5-155U/H system. Its reinforced ribbed structure withstands industrial vibrations and prevents module loosening . An integrated locking mechanism ensures secure module retention while allowing straightforward insertion and removal . The gold-plated contacts maintain low contact resistance over extended periods .
System Integration and Installation
You can install this basic module in the dedicated S5-155U/H central rack slot . The module supports both standard 35 mm DIN rail mounting and direct rack installation . The design simplifies CP581 module installation and removal, reducing maintenance time and potential wiring errors . The module operates reliably across a wide temperature range .
Compatibility and Lifecycle Information
This basic module works with the CP581 communication processor series (6ES558x) . The product has reached end-of-life (EOL), and units are available through MRO and refurbished channels . Users should verify compatibility with their specific S5-155U/H system revision before ordering.