For several decades, PC-based solutions have been widely used for
data acquisition and control in industrial automation. Early
implementations relied on expansion cards inside a PC to attach I/O
devices such as sensors, switches, alarms, etc. However, this solution
was not effective over long distances due to the inherent limitations of
I/O signal transfer. Serial remote I/O modules were later developed,
allowing wiring to be extended over greater distances. However, serial
remote I/O was unable to handle demands for long-range, multi-point
monitoring and control.Download the white paper now