ContentsNI PCIe-8255R User Manual x ni.comConsiderations When Connecting the Digital I/O......................................................... 2-13Wiring an Isolated Input to a Sourcing Output Device................................... 2-13Wiring an Isolated Output to an External Load .............................................. 2-14Protecting Inductive Loads ............................................................................. 2-15Transmission Line Effects .............................................................................. 2-16Chapter 3Signal ConnectionsConnectors..................................................................................................................... 3-2IEEE 1394b Connector ................................................................................... 3-2ATX Connector............................................................................................... 3-2General-Purpose Digital I/O ........................................................................... 3-3Cabling .......................................................................................................................... 3-8IEEE 1394 Camera Cables.............................................................................. 3-8I/O Terminal Block ......................................................................................... 3-8NI Vision I/O Terminal Block and Prototyping Accessory ............................ 3-8Power Requirements...................................................................................................... 3-9Isolated Outputs Power Connection................................................................ 3-9Appendix ATechnical Support and Professional ServicesGlossaryIndex