All Automation Panels support USB. Whereas USB signals are transferred via a separate cable with the DVI link (USB is not part of the DVI standard), USB is fully integrated in the SDL. All Automation Panels are equipped with a USB hub that provides up to three USB ports. USB peripheral devices such as CD-ROM drives, USB flash drives, or keyboards can easily be connected to the operating unit. Access to the control cabinet is not necessary. Automation PCs can also be booted via USB. USB is supported on the first two displays up to a segment length of 30 m. If the segment length is more than 30 m, then USB is only supported on one display. The maximum segment length is 40 m in this case.