The DCX-PCI 300 Series of motion montrollers use one of two different interconnection schemes, depending on the DCX-PCI-300 motherboard model used. One model is the high-density "-H" version, part number DCX-PCI-300-H, the other is the the ribbon cable "-R" version, part number DCX-PCI-300-R.

• The DCX-PCI-300-H (High-density connector) model allows the use of high-density VHDCI-to-VHDCI SCSI cables with the DCX-BF3XX-H breakout board shown below. Note: The DCX-PCI-300-H also supports the -R (ribbon cable) version of the plug-in modules, but to take advantage of the high-density connectors, -H versions of the plug-in modules must be used.
  
  
• The DCX-PCI-300-R (Ribbon connector) model uses the same 26-conductor IDC ribbon cables that the rest of the DCX product family uses, and therefore the DCX-BF300 and DCX-BF360 breakout boards that the other 300 Series DCX boards use. This model of the DCX-PCI-300 motherboard is not compatible with high-density cables and requires the use of -R version plug-in modules.