The Siemens 6ES5944-7UB21 is a central processing unit (CPU) module designed for the Simatic S5-115U system. This robust and reliable unit is a key component in the efficient operation of your PLC system. With its dual interfaces, it offers enhanced connectivity and communication within your industrial automation setup. Originating from Germany, this CPU module operates at a voltage of 24 Vdc and is compatible with the STEP 5 programming language. Despite its discontinuation, the Siemens 6ES5944-7UB21 remains a valuable asset for maintaining and upgrading existing Simatic S5 systems. Its compact dimensions and lightweight design make it an easy fit in most industrial environments. Please note that this part is a spare part, indicating its importance in keeping your operations running smoothly.