PLC detecting device

The utility model discloses a PLC detecting device, including the PLC module, and with temperature sensor, alarm, infrared sensing module, self -checking module, drive module and AD module that the PLC module is connected, wherein drive module is connected with a water supplying valve, the 2nd water supplying valve, fan, first water pump, second water pump and sprays the pump, the AD module is connected with a level sensor and the 2nd level sensor, a water supplying valve, first water pump and a level sensor are fixed in first water tank, second water pump, the 2nd water supplying valve and the 2nd level sensor are fixed in in the second water tank. The utility model has the advantages of intelligent degree is high, is convenient for maintain and control that the replacement cost is low, market prospect is wide.