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Description
The Siemens 6ES5 926-3SA12 (CPU 926S) is a high-performance central processing unit designed for the SIMATIC S5-150U/150S automation systems. This processor module is engineered for complex mathematical computations, high-speed logic execution, and the management of extensive local and distributed I/O architectures. It is widely utilized in demanding industrial environments, including oil refining, thermal power generation, and automated mining, where it ensures process loop stability and minimizes unscheduled downtime through rapid task scanning and integrated diagnostic routines.
Features
- Optimized instruction set for advanced sequencing and closed-loop process control.
- Integrated high-speed bit and word processors for efficient binary logic and floating-point arithmetic.
- Robust memory management supporting dedicated RAM and EPROM submodules for secure application code storage.
- Deterministic interrupt handling via the SIMATIC S5 parallel backplane bus.
- Front-panel physical interfaces including a dedicated programming port for PG interconnection.
- Mechanical toggle switches for direct control of CPU operational states (RUN, STOP, COPY).
Applications
This CPU module is suitable for large-scale automation tasks in heavy industry, specifically designed for applications requiring high-density I/O management and complex process control loops within the SIMATIC S5-150U/150S platform.
Technical Specifications
| Model |
6ES5 926-3SA12 |
| Brand |
Siemens |
| Series |
SIMATIC S5 (150U/150S) |
| Module Type |
CPU 926S Processor Card |
| Operating Temperature |
0 to 60 deg C |
| Storage Temperature |
-40 to 70 deg C |
| Relative Humidity |
95 percent non-condensing |
| Current Consumption |
2.5 A typical from backplane |
| Internal Backplane Voltage |
5 VDC |
Installation Guidelines
- Ensure the system power is completely disconnected before inserting or removing the CPU module from the rack.
- Verify that the module is correctly seated in the designated SIMATIC S5 backplane slot to ensure proper bus contact.
- Maintain adequate ventilation within the cabinet to keep the ambient temperature within the specified 0 to 60 deg C range.
- Use shielded cables for all communication interfaces to prevent EMI interference in high-noise industrial environments.
- Handle the module using ESD-safe procedures to prevent damage to internal electronic components.
FAQ
What is the primary function of the 6ES5 926-3SA12?
This module serves as the central processor for the SIMATIC S5-150U/150S system, handling logic execution, mathematical calculations, and I/O management for automated industrial processes.
Does this module require external memory?
The CPU 926S supports the use of EPROM submodules to ensure that application code and data blocks are retained during power loss.
What does the front panel switch control?
The front panel features physical toggle switches that allow the operator to manually set the CPU operational mode to RUN, STOP, or COPY.
