The DS802 PHS (peripheral high-speed) link board from dSpace provides modular and flexible options for setting up real-time systems with a PHS bus. The link board enables developers to use I/O boards in expansion boxes that have no processor board of their own. Up to now, each expansion box had to have its own processor board. The link board ensures that all I/O boards appear to the processor board to be in one big system, whether they are actually located in the master or in a slave. The entire distributed system requires only one processor board in the master system. The link board handles communication between the master system and the slave systems via optical links.