Curing barn fan directional operation control box controlled by pressure transmitter

A curing barn fan directional operation control box controlled by a pressure transmitter comprises a box body and is characterized in that a control circuit of the curing barn fan directional operation control box is formed by the pressure transmitter, a contactor, a relay, a programmable logic controller, an analog quantity processing module and buttons. On the basis of the principle of motor forward and reverse rotating, no matter how a three-phase four-wire power supply inlet wire phase or a motor wiring changes, a fan can be controlled to always rotate directionally in the same direction through program control, so the normal running of production is guaranteed. Meanwhile, the curing barn fan directional operation control box is simple in structure and safe and convenient to use.