Mine flame-proof type intrinsic safety signal converter

The utility model provides a mine flame-proof type intrinsic safety signal converter. The mine flame-proof type intrinsic safety signal converter comprises an intrinsic safety input segregation board, a programmable logic controller, a bus module and a plurality of optical fiber bus modules, wherein the intrinsic safety input segregation board, the programmable logic controller, the bus module and the plurality of optical fiber bus modules are sequentially connected in series. The optical fiber bus modules are communicated with the bus module through data lines, and a plurality of double level switching value signals and a plurality of frequency value signals are connected into the programmable logic controller through the intrinsic safety input segregation board and carry out conversion and transmission of bus data through the bus module by a high-speed 485 electricity port and through the optical fiber bus modules by a high-speed 485 optical port. The mine flame-proof type intrinsic safety signal converter