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Text version of the page
Power Utilities Cellular Modem Metering Application
System Diagram Background Solution Description
The traditional utility meter displays energy usage as an accumulation of counts and is used to calculate the monthly bill. It has applications within the electricity, gas, and water utility industries. Sub-metering is often used within a building or industrial facility where it is desirable to measure power consumption for specific equipment, locations or sub-level accounts. With rising energy costs and environmental protection laws such as the Climate Change Levy, there is a growing need to reduce power consumption. System integrators can achieve this goal by utilizing remote management for power efficient products and technologies. However, it can be difficult to tell if excessive power consumption is the result of electricity "thieves" or power-hungry devices. Automatic Meter Reading (AMR) is the best way to solve this problem and wireless solutions can make deployment and maintenance easier. In order to enable modem calls for Automatic Meter Reading, each computer running the AMR software in the control center is connected to a cellular modem such as the OnCell G2110-T, which can withstand temperatures up to 75°C. In addition, GSM/GPRS modems communicate with the meter via RS-232 interface on the remote side. Since the GSM/GPRS communication system enables continuous and reliable data transmission between the metering device and the central reporting system, customers monitor and retrieve system information in real-time. The remote side is always passive so the control center initializes the connection for any data transmission that is needed between the control side and the remote side.
Benefits
• RS-232 serial interface brings cellular connectivity to legacy meters • Single modem solution provides one-way connection • Wide operating temperature range up to 75°C for critical environment
Control Center
Power Utilities D evice S e r v e rCellular Modem Metering Application
Application Requirements
• Operation under extreme heat because devices are installed inside a cabinet that is exposed to the sun all day
B a s e S tat ion
• One-way connection from the control center to the remote sites • Modem calls to collect data from utility meters that have a modem interface
SerialEthernet
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