Siemens S5 CPU 946 6ES5946-3UA22 | High-Performance CPU

Product Description

The Siemens 6ES5946-3UA22 is a central processing unit (CPU 946) designed for the SIMATIC S5‑135U PLC system. This CPU provides high-performance processing, reliable I/O management, and robust communication capabilities. Moreover, it supports complex control programs, making it ideal for demanding industrial automation tasks in manufacturing, process control, and energy systems.

Even though the S5 series is part of a legacy platform, the CPU 946 remains available as a spare part, ensuring long-term support for existing installations. Its large memory capacity (~512 KB) enables handling of advanced automation programs efficiently, while diagnostic and communication features facilitate monitoring and integration within S5 systems.

Technical Specifications

• Model Number: 6ES5946-3UA22

• Manufacturer: Siemens

• Series: SIMATIC S5

• CPU Type: CPU 946

• System Compatibility: SIMATIC S5‑135U PLC system

• Memory (RAM): 512 KB user memory (expandable depending on configuration)

• Functions: Executes control programs, manages I/O processes, diagnostics, communication

• Cycle Time: Approx. 0.1–0.3 ms per 1,000 instructions (depending on program complexity)

• Interfaces: Compatible with S5 bus modules, communication processors

• Application Scope: High-performance automation tasks in industrial environments

• Dimensions (H × W × D): 213 × 266 × 33 mm

• Weight: 0.45–0.5 kg

• Lifecycle: Spare part, supported for existing S5 systems

FAQ

Q: Which PLC system is compatible with this CPU?
A: Siemens 6ES5946-3UA22 is compatible with the SIMATIC S5‑135U system.

Q: What is the available memory capacity?
A: The CPU provides approximately 512 KB of user memory, expandable based on configuration.

Q: Is this CPU still supported?
A: Yes, it remains available as a spare part for legacy S5 installations.

Q: What are the main functions of this CPU?
A: It executes control programs, manages I/O, provides diagnostics, and supports communication.

Q: What cycle time can be expected for program execution?
A: Approximate cycle time is 0.1–0.3 ms per 1,000 instructions, depending on program complexity.