M-SYSTEM MD2202-D32-X-P Transfer switch module

M-SYSTEM MD2202-D32-X-P Transfer switch module

The introduction of the input and output functions of M-SYSTEM MD2202-D32-X-P can be seen from the wiring diagram in Figure 5-7. The system includes 5 digital inputs; 8 digital output (one of which is pulse output); 3 Analog input; 2 Analog output. According to the main components of the system and the functions of each component, the program can be roughly divided into: frequency converter control; Surface cooler control; Heater control; Air valve control;

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The cooling and dehumidification of the system are realized through M-SYSTEM MD2202-D32-X-P, so two PIs need to be made in the control program of the surface cooler. That is, one is adjusted according to temperature and the other is adjusted according to humidity. Compare the output value of PI between the two, and the actual value of water valve should be the larger value. The implementation in the program is shown in Figure 9: it is completed through the "analog comparator" and "analog MUX" function blocks.

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