Three new interference-free measurement boards expand the range of products in the PCI Express series from Addi-Data: the APCIe-2200 relay board, the APCIe-3021 analog input board and the APCIe-3521 analog output board. Equipped with numerous protective circuits, these boards are suited for use in harsh industrial environments. They come with extended functionalities in the domains of data exchange with the PC memory, input and output ranges and signal transfer directly to the PC RAM via DMA. Free drivers for Windows 7/Vista/XP and Windows 2000, Lab VIEWTM from version 5.01 and LabWindows/CVITM are delivered as standard. Drivers for other operating systems such as Linux and software packages are available on request.