The Siemens 6SN1118-0DG23-0AA1 is a SIMODRIVE 611-D closed-loop plug-in performance control unit designed for a single-axis digital-drive application that governs feed and main spindle drives equipped with a direct measuring system and voltage-signal feedback. As a spare-part module, it is no longer sold new by Siemens; the official catalog notes a successor, 6SN1118-0DJ23-0AA0, with compatibility guidance for NC software version 6.4.9. The module belongs to the SIMODRIVE 611-D family, providing dedicated closed-loop control within industrial drive systems where precise axis motion is required.
