The 6ES7223-1PH22-0XA8 is an EM 223 Digital Input/Output module designed for use with the Siemens S7-200 programmable logic controllers (PLCs). Here are some key features and specifications:

1. Inputs: It provides 4 digital inputs.
2. Outputs: It offers 4 relay outputs.
3. Input Voltage: The input voltage range is typically 24VDC for digital inputs.
4. Output Load Handling: The relay outputs can handle resistive loads up to 5A at 250VAC.
5. Expansion: It expands the I/O capabilities of the S7-200 PLC, allowing for additional digital inputs and outputs to be connected.
6. Compact Design: The module is designed to be compact and easily integrated into the S7-200 system.