Attention! Delta's inverter communication should be based on these points
What should we pay attention to when installing and connecting Delta Inverter communication? First of all, we consider the distance and location distribution when connecting, how to install the inverter communication? What are the installation modes of the inverter? Some are relatively simple and can be directly connected in parallel and connected in an unlimited distance and number of nodes.
This article introduces the hand-in-hand solution and the direct parallel solution, indicating that the hand-in-hand can achieve the connection of unlimited distance and number of nodes. .
Simple RS-485 direct parallel connection; this direct parallel connection is also a simple connection method for RS-485. Five RS232 devices are equipped with five 485A converters, and then the RS-485 terminals are directly connected in parallel, all A are connected together, and all Bs are connected together. The distance is limited by 1200 meters and the limit of 128 nodes. In most cases it is possible to communicate.
Hand-in-hand RS-485 connection; it seems to be similar to direct parallel, but please note that each 485A2 converter has 2 RS-485 ports. In the figure, you can see that the two RS-485s of each 485A2 converter are equivalent to two hands, and the connection method looks like hand-in-hand.
The 485A2 converter is also called RS-232/RS-485 relay converter, and its two RS-485s have mutual relay functions, so Each 485A2 communication distance is extended by 1200 meters, and the number of communication nodes is increased by 128. In this way, it is more convenient to use without regard to how many nodes have been laid and how far away they are. Note that because only one RS485 port is used at both ends, 485A can be used.
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