ER 1000 Remote Terminal Unit (RTU), the building block of ERL Substation Automation System is designed to meet the present day utility and industry demands. The RTU is built on internationally well proven hardware and software platform. The standard hardware platform gives the necessary ruggedness and RTOS (Real-Time Operating System) provides the multi-tasking and Real-Time data handling capability. This makes the ER 1000 Automation Product of the 21st century.