Extensible long-distance multi-path gas sampling expansion device
A technology for expanding device and gas sampling, applied in sampling device, measuring device, sampling and other directions, can solve the problems of sampling, multi-channel analysis device without expansion device, efficiency needs to be further improved, etc., to achieve the effect of convenient use and simple structure
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[0019] The main control board of the expansion device establishes communication with the main control device through the RS485 interface. After receiving the command, the main control board of the expansion device realizes the control of the direct-acting solenoid valve group through the multi-channel I / O signal isolation amplifier, and switches between different air inlets. gas collection and evacuation.
[0020] The main control board of the expansion device provides a Bluetooth configuration interface, and the user can configure the basic information of the main control board through the APP.
[0021] The expansion device comes with 6 sampling ports. If the number of sampling ports is insufficient, the next expansion device can be cascaded. The communication method adopts RS485 communication mode, and the communication protocol uniformly adopts the Modbus-RTU protocol. The operation of multiple gas path expansion devices It is uniformly controlled by the main control board ...
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