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The Siemens 6ES5928-3UA11, also known as the CPU 928A, is a high-performance central processing unit designed for the SIMATIC S5 automation system. Specifically engineered for integration with S5-135U and S5-155U programmable logic controller platforms, this module provides robust control capabilities for complex industrial automation tasks. Although this component is now discontinued by the manufacturer, it remains a critical spare for maintaining legacy control infrastructure.
This CPU module is primarily utilized in industrial environments relying on the legacy SIMATIC S5 architecture, including heavy manufacturing, chemical processing, and power generation facilities where S5-135U or S5-155U systems are still in service.
| Manufacturer | Siemens |
| Product Model | 6ES5928-3UA11 |
| Series | SIMATIC S5 |
| Component Type | CPU 928A Processor Module |
| Compatibility | S5-135U / S5-155U |
| HS Tariff Code | 8537109060 |
This module is a legacy component that has been discontinued by Siemens. Please verify your specific requirement for refurbished or surplus inventory status with our sales team.
This processor is specifically designed for the Siemens SIMATIC S5-135U and S5-155U programmable controller systems.

Quick dispatch from our global inventory to reduce downtime and ensure uninterrupted operations.
All parts are sourced from reputable manufacturers and undergo thorough quality checks.
Extensive stock of industrial automation and discontinued parts, ready for immediate shipment.
Every product — including obsolete items — is covered by a 12-month warranty and 30-day return guarantee.
All product names, trademarks, brands, and logos mentioned on this website are the property of their respective owners.These names and trademarks are used for identification and reference purposes only.We are an independent supplier of industrial automation spare parts.We are not an authorized distributor, dealer, or representative of any manufacturer.Products supplied may include surplus inventory or unused items.We do not claim any affiliation with or endorsement by the original manufacturers.