Wiring method of solenoid valve

1. Change the three screws that fix the control board to M4x 35 hexagonal wire post, fix the solenoid valve control board on the hexagonal wire post, and add insulation paper between the two boards.

2.The common inlet wire of the solenoid valve control board is taken out from point B of the incoming end of the motor control board below (the connection at point B is less). (When the connection between the junction box and the power supply box should be changed from the original four-core to five-core). Converge with one neutral wire in the explosion-proof junction box, and the three wires enter the solenoid valve together.

3. The auxiliary valve control line (EM2) of the solenoid valve is connected to the TO terminal on the terminal board (or the MT terminal on the motor control board). The main valve control line (EMl) is connected to the OA terminal on the terminal board. ), The two "-" ends of the main and auxiliary valve control lines are connected to the ten MT group of the motor control board. -"end.

4. Judgment of the main valve and the auxiliary valve of the solenoid valve (of the three lines led by the solenoid valve, under normal circumstances, the two-color line is the auxiliary valve line, and the brown line is

Main valve line, blue line is zero line):

(1) Wire adjustment method: Because the solenoid valve is a double coil and the lead-out wire is three-core, if it is a four-core, one of them is connected to the valve housing as a ground wire. (It can be measured with a multimeter resistance file.) Its internal wiring. Use the multimeter's ohm range (x100) to find ① terminated zero line, (the resistance of the main and auxiliary valve coils are the same) ② and ⑦ are connected to the main and auxiliary valve output lines of the solenoid valve control board, respectively. Pre-set oil volume start-up test. If there is a small flow before the shutdown, the wiring is correct. If there is no small flow, replace the ② and ③ lines.

(2) Power-on method: Before installing the solenoid valve, first use a multimeter ohm file (x100) to find ① the neutral wire to be terminated. In addition, ② and ③ are the main and auxiliary valve lines. Because the solenoid valve is powered by 220V AC, the ①② or ①③ two lines are connected to the 220V power supply.

3 judging the main and auxiliary valve coils by energization method

Blow air from the inlet of the solenoid valve, the main valve is the general valve, the lead corresponding to ① is the main valve line, and the main valve of the solenoid valve control board is the outlet; , Connect the solenoid valve control board to the outlet of the valve.