Product Overview

The 6ES5928-3UB12 is a high-performance CPU 928B central processing unit designed for the Siemens SIMATIC S5-135U and S5-155U programmable logic controller systems. As a critical component of the S5 legacy platform, this module provides the computational speed and memory management necessary for complex open-loop and closed-loop control tasks. It is specifically engineered to handle sophisticated automation sequences in large-scale industrial environments, offering a reliable path for maintaining and optimizing established manufacturing infrastructures.

This processor is distinguished by its ability to manage high-speed data processing and its integration of advanced interrupt handling. It remains a vital asset for facilities requiring exact replacement parts for their S5 hardware to ensure continuous operation without the immediate need for a full system migration.

Technical Specifications

• Model Series: SIMATIC S5, CPU 928B

• Memory Configuration: 46 KB internal RAM for data and 64 KB EEPROM capacity

• Instruction Execution: High-speed processing for binary and floating-point math

• Interrupt Handling: Supports delay interrupts via Organization Block (OB) 6 with 1ms resolution

• Communication Support: Compatible with SINEC L1 and various S5-level networking protocols

• Data Retention: Retentive cold restart functionality for critical process data preservation

• Current Consumption: Approx. 0.8A to 1.2A from the 5V backplane bus

• Dimensions: Standard S5-135U/155U double-width module format

• Weight: 0.95 kg

• Dimentions:2.5 cm x 5.1 cm x 8.8 cm
  

• Origin: Made in Germany

Advanced Logic and System Architecture

The 6ES5928-3UB12 CPU 928B introduced a more flexible architecture for memory utilization, allowing for alternative loading methods of data blocks. This versatility enables developers to optimize program execution based on specific machinery requirements. The inclusion of specialized organization blocks allows the CPU to respond to time-critical events with high precision, making it suitable for applications in chemical processing, automotive assembly, and power distribution where timing is paramount.

Furthermore, the module’s robust electrical design is tailored for the high-vibration and electrically noisy environments common in heavy industry. Even as a legacy component, its diagnostic capabilities via front-panel LEDs provide immediate feedback on CPU status, parity errors, and battery health, facilitating rapid maintenance and minimizing unplanned downtime in mission-critical systems.