At the IT level, the OPC UA is scalable from small devices. As in 2012, the OPC UA server was reduced in size to a 10 KB footprint by the Fraunhofer Institute to integrate it into the smallest sensor on chips.
An OPC UA server has been integrated into the company Areva into the monitoring device sensors for valves and electrical drives. In the nuclear industry, the solution is used to monitor critical systems in remote environments.
The data reliability and safety integration are some essential aspects where memory utilization is required by the OPC UA server at 240 Kbyte Flash and 35 Kbyte RAM.
Source:- Elektronik Praxis