Last updated: May 2026. For specific driver file downloads, refer to the official chip vendor websites (FTDIchip.com, Prolific.com.tw, Silabs.com). Siemens SCI pinout diagrams and protocol details are available in Siemens service manual "6ZB5 440-0DQ02-0BA6".
Good news. Modern Linux kernels (2.6+ and newer) include built-in drivers for PL-2303, FTDI, and CP210x. Just plug the cable in. On macOS, FTDI and Silicon Labs provide official installers; Prolific’s driver may require disabling System Integrity Protection (SIP) on newer macOS versions. sci usb2serial drivers