140CPU11302 can communicate with the data centre of thousands of miles in both directions, but the GSM data transmission equipment only needs to communicate with the nearby mobile base station, its overall power consumption is comparable to an ordinary GSM mobile phone, the average power consumption is only about 200 milliwatts, which is much smaller than that of traditional data transmission radios. Therefore, the GSM transmission method is very suitable for use in the field using solar power or battery-powered occasions.

140CPU11302 field monitoring point by the PLC to achieve automatic control, and collect relevant information, through the RS232 or RS485 interface and GSM DTU terminal connected to the equipment information collected by the PLC through the GSM DTU terminal data processing, protocol encapsulation and sent to the GSM wireless network.

The monitoring centre of 140CPU11302 adopts public network access solution server to access Internet by public network, such as ADSL dial-up/telecommunication dedicated broadband Internet access, etc., and apply for fixed IP address of public network; it can realize small and medium-capacity system application. The server adopts the DDN line provided by the provincial mobile communication company, applies for the configuration of fixed IP address, and connects with the GSM SMS remote control module. As the DDN line can provide higher bandwidth, when the number of PLC on site increases, the centre can meet the demand without capacity expansion, and it can realize the application of high-capacity system.