ADLINK PXI-8570 - Manual (Page 16)

12 • Installation
• If you turn on the system with primary extension module first and
then secondary extension module, the indicated LED of both
modules will keep twinkling.
• If the communication between primary and secondary extension
modules is broken, the indicated LED of primary moudle is bright and
the LED of secondary module is dark.
• If Star or Daisy-chain configurations are implemented, please always
turn on the secondary system first.
Figure 2.3 Basic PCI extension configuration – extend one PCI segment