Siemens 6ES7288-1SR30-0AA0 (CPU SR30) is a standard CPU module for the SIMATIC S7-200 SMART compact PLC system. It features AC power input, 24V DC digital inputs, and relay outputs, ideal for small-to-medium automation machines and control panels.Product status: Discontinued (replaced by 6ES7288-1SR30-0AA1) — widely available as new surplus, refurbished for system maintenance.