Modulo CPU SIEMENS 6ES7 313-5BF03-0AB0 6ES7313-5BF03-0AB0 S7-300 - Funzionante
Based on the part number 6ES7 313-5BF03-0AB0 shown in your image, here is a breakdown of what you're holding and its key technical specifications. This specific model is considered a "legacy" product.