| The combination of coal, gas detection based on the practical problems raised by a technical meters wide (M-Bus) watt-smart management system..The first use of this system M-Bus agreement features of the physical characteristics and associated introduced to the specific operation M-Bus process and the rule of analysis. Then the main settlement of the following issues :In the current gas detection research and development of long-range two-way links need watt-management system smart design ideas, and the system made by the various functional modules described, but also to M-Bus core devices from the controller communication TSS721A made detailed presentations.On the communication from the aircraft interface design given detailed analysis, the main completed mainframe interface receiver, transmitter, repeater and voltage supply module from the machine interfaces and the design of the power supply mode and switch protection, and networks in design.Focus on the wisdom terminal system (with units) of the functional modules made corresponding hardware and software design. P89LPC932 OCM2 x 8 chips used in liquid crystal display and achieved with LCD shows; P89LPC932 a special keyboard input function for the distribution of it may not be equal to or when PO mouth of a model can be generated to break the unfinished keyboard identification; modular design to the low voltage electricity supply, low consumption, miniaturization design, the use of cells and M-Bus bus system to supply electricity in two ways.
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