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Central Processing Unit for SIMATIC S5-95U Controllers
The Siemens 6ES5945-7UA22 processor module serves as the central intelligence for S5-95U programmable controllers in distributed automation systems. This CPU integrates a high-speed 16-bit microcontroller that executes user programs with exceptional efficiency. It manages up to 32 expansion modules, making it ideal for medium-scale applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6ES5945-7UA22 |
| Series | SIMATIC S5-95U |
| Product Type | Processor / CPU Module |
| Processor | 16-bit microcontroller |
| Memory (RAM) | 4 KB (battery-backed) |
| Memory (EEPROM) | 4 KB (integrated) |
| Memory Expansion | Up to 8 KB via plug-in EEPROM |
| Floating-Point Arithmetic | 32-bit hardware support |
| Program Execution Time | Approx. 6 ms for 1K instructions (binary operations) |
| Peripheral I/O Addressing | Up to 256 bytes |
| Timer/Counter | 8 timers, 8 counters |
| Interfaces | 1 x 20mA (TTY) for programmer, 1 x SINEC L2 (LAN) |
| Expansion Slots Supported | Up to 32 S5-100U modules |
| Power Supply | 24V DC via backplane |
| Operating Temperature | 0°C to 60°C |
| Weight | 0.5 kg |
| Dimensions (W x H x D) | 25 x 120 x 116.4 mm |
| Protection Rating | IP20 |
Processing Power and Performance
The Siemens 6ES5945-7UA22 executes binary operations in approximately 6 milliseconds per 1,000 instructions, ensuring fast scan cycles. The integrated hardware floating-point arithmetic also accelerates mathematical calculations for process applications. This performance suits applications requiring rapid response, such as packaging and material handling systems.
Memory Architecture
This processor includes 4 KB of battery-backed RAM for program and data storage during runtime. It also features 4 KB of integrated EEPROM for retaining critical parameters without battery power. Users can expand memory up to 8 KB using an optional plug-in EEPROM module.
Communication Capabilities
The 6ES5945-7UA22 includes a 20mA (TTY) interface for connecting programming devices and operator panels. Additionally, it integrates SINEC L2 LAN support for distributed automation networks. These interfaces enable seamless integration with supervisory systems and other controllers.
Expansion and I/O Control
This CPU handles up to 32 S5-100U expansion modules for flexible system scaling. It addresses up to 256 bytes of peripheral I/O for comprehensive process control. The module consequently supports systems ranging from small standalone machines to coordinated production lines.