Basically, a Remote Management system includes:
Data collection device, known as Remote Terminal Units, which are housed in electronic boxes installed near the monitored equipment. Field data are acquired via contacts in control cabinets or through sensors (for measuring level, pressure, flow, etc.), PLCs, controllers, meters, etc. RTUs then process these data in order to:
notify the on-duty operator of alarms,
automatically generate summarized data for plant monitoring, i.e.:
periodic reports on plant status, meter indexes, measurements...
equipment run-time reports: periodic evaluation of number of alarm/event appearances and time spent in a state, calculation of averaged, minimum and maximum measured values, index differences in meters, etc.
control the monitored equipment remotely.
Communications media, which are the physical paths over which data flow from the field devices to the central data processing or broadcast equipment.
Central data processing devices referred to as master stations. These PC-based supervisory control hosts are usually installed in the central control room of the network. They feature data retrieval capabilities such as tabular report generation, trending, mimic display, and more.
Communications devices allowing data to be seamlessly forwarded to the on-duty or maintenance staff - pagers, cell phones, PCs, or handheld terminal.
