Agilent / HP / Keysight E1459A

The 64 Channel Isolated Digital Input/Interrupt Module is a C size, 1 slot, register based VXI module.

It is used to sense DC levels and edge transitions up to 48Vdc.

All inputs are optically isolated to withstand up to 125V rms or Vdc.

Plus, using the module's built in 5V supply with 9.4Kohms effective pull up resistance, you can detect whether external switches are open or closed.

The debounce feature is programmable for periods of 16µs to 1074 s in binary increments.

Channel groups 1 to 32 and 33 to 64 can each have a unique programmed debounce period.

Each word (16 bit/channel) has strobe in, ready for data, and interrupt out.

Strobe in lines can be connected in parallel for 32 or 64 bit transfers.