Keithley KPCI-PIO24

This parallel digital I/O board has a wide range of functionality for applications as diverse as digital I/O and process control to prototyping and parallel communications.

They will provide 96 or 24 TTL-level digital I/O lines that can be used for digital control of processes and monitoring of the status of switches, contacts, or other control points.

All of the digital I/O lines can be accessed simultaneously by the hardware and software.

These lines will also provide high current driver outputs for sinking (64mA) and sourcing (15mA).

This will allow them to drive relays directly without any interface circuitry.

The KPCI-PIO24's 24 digital I/O lines are grouped into three separate 8-bit ports (PA, PB, and PC).

These can be set independently under software control as inputs or outputs.

In addition to operating as a standard 8-bit data port, the third port (PC) can be subdivided into two half ports of four bits apiece.

The PA, PB, and PC ports can be read/write accessed, regardless of their initial configuration, without affecting external signal levels.

All of the ports default as inputs upon initial power-up or reset conditions.