Siemens 6ES7212-1AB23-0XB0 SIMATIC S7-200 CPU 222 Compact Unit

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Main Specifications

Core Features & Advantages

• Expandable Design for Greater Flexibility: The module's standout feature is its expandability. Unlike the non-expandable CPU 221, the CPU 222 supports up to two expansion modules, allowing you to increase the number of I/O points or add specialized functions such as analog inputs, communication interfaces, or temperature measurement .

• Balanced Performance for Basic Applications: The CPU 222 provides a solid balance of capability and cost for straightforward control tasks. It offers 4 KB of program memory and 2 KB of data memory, making it suitable for controlling small to medium-sized machines or processes with logic and timing functions.

• Essential High-Speed Functions: The module includes fundamental high-speed features, such as 4 independent 30 kHz high-speed counters and 2 independent 20 kHz high-speed pulse outputs, making it suitable for basic positioning or speed measurement tasks .

• Multiple Communication Protocols: The single built-in RS485 interface supports PPI, MPI, and Freeport communication protocols, allowing connection with HMIs, other S7-200 CPUs, and non-Siemens devices via serial communication .

Typical Applications

The CPU 222 is widely used as a micro-controller for small to medium-scale automation applications, including:

• Small Machine Control: Controlling packaging machines, labeling equipment, and simple conveyor sections .

• Building Automation: Managing small-scale building control tasks like lighting control or small fan systems.

• Sensor and Actuator Interfacing: Directly connecting sensors and actuators for specific control loops.

Important Product Status Note

This product is part of the SIMATIC S7-200 series, which is discontinued by Siemens and no longer in active production. It is classified as a spare part, and availability is primarily through surplus or third-party suppliers . For new system designs, the recommended migration path is to the S7-200 SMART series.

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