User Manual

© Sealevel Systems, Inc. - 9 -
PIO-48 User Manual
Digital I/O Interface
The PIO-48’s 48 digital I/O channels are accessed via two industry-standard 50-pin
header connectors. Each header provides 24 bits of digital I/O divided into three
eight-bit ports. Each port may be individually configured via software command as
input or output.
50-pin Header Connectors
You will need to install the bracket assembly and cables to the PIO-48 prior to
installing it in the PC. The PIO-48’s bracket features a unique cable clamp that
provides a solid strain relief to prevent inadvertent cable removal.
Both of the 50-pin connectors has the following pin out which is compatible with a
wide variety of solid state relay racks: