An interface conversion device consists of Wien communication interface circuit for outputting received Wien signal as per bit, conversion treatment module connected to Wien communication interface circuit and used to store signal outputted by Wien communication interface circuit as per bit as well as used to judge complete receipt of Wien signal according to signal effective time threshold then recombining Wien signal data being received completely to be RS485 signal, RS485 communication interface circuit connected to conversion treatment module and used for sending out RS485 signal. |