"A, B" terminal connection method

(1) Connect the 485 twisted pair communication cable to the "A, B" terminal of the host module;  

(2) Connect the communication shielding lines between the combiner boxes in series and ground them at the communication management machine;

(3) Be sure to tighten the "A, B" terminals when wiring;

(4) The connection method of the communication line is as shown below:

Note: Common problems are: “A, B” terminals are not tightened, communication lines are reversed, shielded lines are not grounded, shielded lines are not connected in series, etc.;
          If the communication line is not connected properly, it will cause the host module, communication failure, poor communication, and flash screen.