The ABB PM820-1 3BSE010797R1 is a Processor module.

• Single-board computers (SBCs): SBCs are complete computers that are built on a single circuit board. They typically include a microprocessor, memory, input/output (I/O) ports, and other features. SBCs are often used in applications where a small, low-cost computer is needed.
   
• System on a module (SOM): SOMs are smaller than SBCs and typically only include the microprocessor and memory. They are designed to be integrated into a larger system. SOMs are often used in applications where space is limited or where a high degree of customization is required.

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