Description

The Siemens 6ES5928-3UA11, also known as the CPU 928A, is a high-performance processor module designed for the SIMATIC S5 automation system. Specifically engineered for use within the S5-135U and S5-155U programmable logic controller (PLC) families, this module serves as the central processing unit responsible for executing user programs, managing I/O data, and coordinating communication across the backplane bus. As a legacy component, this unit is essential for maintaining and extending the operational life of existing S5-based industrial control systems.

Features

• Central processing unit for SIMATIC S5-135U and S5-155U systems.
• High-speed instruction processing for complex automation tasks.
• Integrated interface for system-wide data exchange and peripheral management.
• Robust design suitable for demanding industrial environments.
• Direct replacement or spare for legacy S5-155U/135U rack configurations.

Applications

The CPU 928A is primarily utilized in large-scale industrial automation applications where the SIMATIC S5-135U or 155U platforms are deployed. Typical environments include heavy manufacturing, power generation facilities, chemical processing plants, and legacy material handling systems that require high-reliability control logic.

Technical Specifications

Installation Guidelines

• Ensure the PLC rack power is disconnected before installing or removing the CPU module to prevent electrical damage.
• Handle the module by the edges; avoid touching the backplane connector pins to prevent ESD (Electrostatic Discharge) damage.
• Ensure the module is firmly seated in the designated CPU slot of the S5 rack and secured using the integrated locking mechanisms.
• Verify that the rack ventilation is unobstructed to maintain optimal operating temperatures.
• Ensure all firmware and memory submodules are correctly configured for the specific application before powering up the system.

FAQ

Is this module still supported by the manufacturer?

No, the 6ES5928-3UA11 has been discontinued by Siemens. It is typically sourced as a spare part for the maintenance of legacy SIMATIC S5 systems.

What systems is this CPU compatible with?

This module is specifically designed for the SIMATIC S5-135U and S5-155U programmable controller series.