The GX6256 has 16 General Purpose I/O (PIO) signals available to the user. Each signal can be programmed to be an input or an output. Main application for these signals is cable ID and verification of presence of the correct mating connectors. By default, all of the PIO lines are tri-stated on power-up and when reset.
Three event lines are placed on the GX6032 RTM board at location J1, with the ability to either open all relays or generate a PCI interrupt if they read back a low logic level. By default, all of these event lines are disabled. They can be enabled using the API function GxxxxxInterruptSetup.