About Master Telemetry Unit Specifications

Master telemetry units form part of a data collection and storage system that enables communication between remote sites by exchanging information within a computer's operating network. Linked via satellite, master telemetry units use a range of computer software to enable a communications interface between various sites. A prime example is its use in the oil industry to transmit data to and from offshore oil rigs.

Unit Specifications

• Each master telemetry unit platform is attached to a specified industrial computer containing a programmable logic controller, a printer, radio modems and additional electronic circuitry. It is usually fitted in a 19-inch rack, however designs are specified according to user requirements. All necessary features are included, such as trending, control, alarming and data-logging.

Network Specifications

• Master telemetry units are connected to a remote telemetry unit, a historian (software that logs data), and a Human Machine Interface (HMI). The master telemetry unit functions by collecting data from several remote devices and supplying it to systems within the network, including the HMI for long-term storage. Only the HMI is located in the same building as the master telemetry unit.

Connection and Communication Specifications

• The network operates via a gigabyte Ethernet connection, and communication occurs via such means as Ethernet radio, serial radio, cellular data or cellular dial-up. In the event of a loss of connection, or historian malfunction, the master telemetry unit buffers all historical data and backups the historian upon reconnection or repair.

Circuit Specifications

• According to system requirements, master telemetry units run on either a 12- or 24-voltage circuit, which is provided by a maintenance-free lead-acid battery. The battery is connected to an advanced solar-system controller that provides the required autonomy and manages the charge process to ensure maximum battery life.