It's rare that a city has the luxury of totally replacing an existing SCADA system with one utilizing newer technologies. More commonly, the newer technology must be blended with the old without losing functionality or interactivity. That's exactly the situation the city of Rome, Georgia faced.

Their existing SCADA system was originally installed using Motorola INTRAC™ RTUs. Although they remained fully functional, additional INTRAC units were being phased out; yet the system needed to be expanded.

Revere Control Systems was selected to design and install the expansion, and to integrate it with the existing elements of the system. Our engineers examined the requirements and determined that the existing RTUs could be integrated with the Motorola MOSCAD™ units, an intelligent RTU. These units can be programmed to virtually any reporting function required.

Linking the INTRAC and the MOSCAD units required both units to pass through a Central Terminal Unit (CTU) consisting of two Motorola Series 300 CPUs. Radio signals from both types of RTUs are received and transmitted via modems (MIRI for the INTRAC and DPSK for the MOSCAD) through a citywide trunking system. Using MODBUS protocol, information from the RTUs is fed to the CTU, which utilizes FIX DMACS software to integrate the information and interpret data into graphs or alarms.

The design implementation not only allowed the City to keep the value of its investment in the INTRAC units, but also provided them a newer technology platform on which they could base ongoing system growth. Since the original expansion was put in place, Revere has been called upon numerous times to put in additional RTUs to support the system' growth.