Connect your printer via USB and run the TSC Diagnostic Tool.
The .rar archive typically includes the .img or .bin firmware file along with an update utility. sc24526-LEUpd20221222.rar
Ensure your printer is connected to a stable power source during the update. A power interruption while flashing firmware can "brick" the device, making it unusable. Firmware V3.1.1 for SCALANCE SC622-2C, SC626- ... - Support Connect your printer via USB and run the TSC Diagnostic Tool
Use a tool like 7-Zip or WinRAR to extract the contents. sc24526-LEUpd20221222.rar
Improved stability for USB or Ethernet connections.
Firmware for these devices is usually flashed using the Diagnostic Tool (DiagTool) available on the TSC Printers Support site. Common Reasons for This Update