Remote bus bidirectional relay circuit and system

Abstract

The invention provides a remote bus bidirectional relay circuit. The remote bus bidirectional relay circuit comprises a first main body and a second main body, the first main body comprises a first transceiver module, a buffer module and a first optical fiber module; the transmitting-receiving end of the first transmitting-receiving module is coupled with master station communication equipment through a bus, the output end of the first transmitting-receiving module is coupled with the input end of the first optical fiber module, and the input end of the first transmitting-receiving module is coupled with the output end of the buffer module; the enabling end of the buffer module is coupled to the output end of the first optical fiber module; the second main body comprises a second optical fiber module and a second transceiving module which are mutually coupled, the transceiving end of the second transceiving module is coupled with slave station communication equipment through a bus, and the transceiving end of the first optical fiber module is mutually coupled with the transceiving end of the second optical fiber module. The device has the advantages of being simple in structure, free of programming, adaptive in rate, low in cost, small in size and the like, and possibility is provided for high-density and rapid development of remote bus two-way relays.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a remote bus bidirectional relay circuit and system. Background technique [0002] In an electronic circuit, the master station communication device usually needs to realize data exchange and communication with the slave station communication device through the remote bus. Among them, optical fiber communication is the main transmission means of modern communication network, and plays a very important role in long-distance bus communication. [0003] In the prior art, a remote bus (such as 485 bus or 422 bus) usually adopts a point-to-point communication mode. This networking mode has a simple structure, but when multi-channel communication is required, there will be more cables, which is inconvenient for wiring. In view of this problem, a two-way relay circuit can be used to realize the two-way communication of the remote bus. However, the existing two-way relay cir...

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Problems solved by technology

[0003] In the prior art, the remote bus (such as 485 bus or 422 bus) usually adopts a point-to-point communication method. This networking method has a simple structure, but when multi-channel communication is required, there will be more cables, which is inconvenient for wiring

In view of this problem, a two-way relay circuit can be used to realize the two-way communication of the remote bus. However, the existing two-way relay circuit is usually implemented by a CPU chip and an optical fiber interface chip, which has complex circuits, long programming and development cycles, and low cost. Defects such as high cost are not conducive to the application and expansion of remote bus

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