User Manual Manual

- 6 -

SeaLINK PIO-48 User Manual

Digital I/O Interface

The SeaLINK 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 open the SeaLINK PIO-48’s enclosure to access the two header

connectors P2 and P3 (see Appendix B for connector locations). To open, remove

the four screws found on the bottom panel of the unit. Once cables are connected to

the headers reassemble the enclosure with the cables exiting the opening on the back

panel of the unit.

Each of the two 50-pin connectors has the following pin out which is compatible

with a wide variety of solid state relay racks: