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© Sealevel Systems, Inc.
4030 Manual | SL9362 9/2021
Introduction
Overview
The PIO-48 part number 4030 digital I/O interface provides 48 channels of buffered drive digital I/O
emulating 8255 mode zero. The PIO-48 can be utilized for a variety of control and automation applications
including control and monitoring of TTL devices (e.g., LEDs, small solenoids, small relays) and interfacing
to solid-state relay racks (SSRs) for high-power AC or DC loads.
The PIO-
48’s 48 digital I/O channels are accessed via two 50
-pin header connectors with industry-standard
pin out. Each header provides 24 bits of digital I/O divided into three eight-bit groups. Each eight-bit group
may be individually configured via software command as input or output to best match your application
requirements.
The PIO-48 is designed to be used with a variety of Operating Systems including Windows
98/NT/ME/2000/XP/7/8, Linux, and DOS. The SeaI/O API (Application Programmer Interface) included on
CD with the PIO-48 provides a variety of useful high-level function calls implemented as a Windows dynamic
link library (DLL) and as a Linux kernel module and library. In addition to the API, SeaI/O includes sample
code and utilities to simplify software development.
Other Sealevel ISA Digital I/O Products
DIO-16
(P/N 3096)
-8 Reed Relay Outputs / 8 Opto-Isolated Inputs
ISO-16
(P/N 3094)
-16 Optically Isolated Inputs
REL-16
(P/N 3095)
-16 Reed Relay Outputs
DIO-32B
(P/N 3093)
-16 Reed Relay Outputs / 16 Opto-Isolated Inputs
REL-32
(P/N 3098)
-32 Switched Relay Outputs
