Siemens 6FC5312-0DA00-1AA1 Control Unit For SINUMERIK 840D Sl

Siemens 6FC5312-0DA00-1AA1 SINUMERIK 840D sl TCU 30.3 is a Thin Client Unit designed as the dedicated client interface within the SINUMERIK 840D sl CNC system. It is specified as the 30.3 revision of the SINUMERIK 840D sl TCU and is described in Siemens equipment manuals and distributor catalogs as a spare part for the SINUMERIK 840D sl family, intended to work in SINUMERIK/SIMOTION configurations with the system’s operator interface network. In typical deployments, the TCU 30.3 serves alongside other SINUMERIK components to provide a lightweight client terminal for the system’s operator panels, contributing to the integrated 840D sl interface without requiring a full standalone PC. The part is commonly referenced in official Siemens documentation and in authorized reseller listings as the SINUMERIK 840D sl TCU 30.3 thin client unit, used in industrial environments that rely on SINUMERIK 840D sl control architectures.