We have confirmed that there is a problem with Windows 11 that prevents connection to the scanner when connected over a LAN. Please refer to the problem description and workaround.
→ This problem has been fixed in Windows 11 "22H2". Please upgrade your Windows 11 to "22H2".

Scanners Drivers Firmware Softwares Manual
CSX510-09(*1) USB Driver
Ver.2.20 [Windows 11/10/8.1]

Network User Utility
Ver.2.70 [Windows 11/10/8.1]

Twain Driver
Ver.8.70 [Windows 11/10/8.1]
Ver.1.90 Scanning ART 2 for Win [Windows] Ver.3.50

Scanning Master Pro Color [Windows] Ver.8.70 NEW
CSX530-09 Ver.1.90 User manual (English)

Scanning Master Pro Color
User manual (English)
CSX550-09 Ver.1.61
Operation is not guaranteed after warranty period is expired.
On driver and software, the file is compressed in the ZIP format. It is required to decompress before use.
On driver and software, it is for the Windows-based PC.
On driver and software, the Network User Utility is required for connecting scanner to LAN (Ethernet).
On driver and software, the language is in English.
On driver and software, the Macintosh OS or other OS is not supported.