OPC UA features in its upgradability and compatibility and is widely used in control system, MES and ERP. Being deployed on a variety of systems by SOAP/XML over HTTP, OPC UA is with high security because the data is protected by authentication and encryption mechanism. Advantech OPC UA Gateways EKI-1242OUMS and EKK-1242IOUMS serve as protocol converters that connect legacy devices to Ethernet infrastructure, allowing control centers in OPC UA environment to easily connect to legacy devices for data acquisition.