Passive light-splitting RS-485 optical fiber bus local side system

A RS-485, bus station technology, applied in the field of industrial manufacturing, can solve the problem of not guaranteeing high-speed long-distance communication requirements, communication rate decline, etc., to achieve the effect of improving anti-lightning protection ability, cost saving, and system simplicity

Active Publication Date: 2015-06-24
广东启鼎光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As the transmission distance increases, the communication rate will drop sharply, which cannot guarantee the high-speed and long-distance communication requirements

Method used

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  • Passive light-splitting RS-485 optical fiber bus local side system
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  • Passive light-splitting RS-485 optical fiber bus local side system

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Embodiment

[0048] Example: see Figure 1 to Figure 21 , the present embodiment provides a passive optical splitting RS-485 optical fiber bus local end system, its two ends are respectively connected to the RS-485 bus control end of the passive optical splitting industrial optical fiber bus and the passive RS-485 optical network terminal; it includes Interconnected power supply module, main control board, multiple planar waveguide optical splitters and multiple optical ports, wherein the main control board includes RS-232 central control interface, RS-485 central control interface, two RS -485 cascading interface, a plurality of photoelectric conversion modules and bus arbitration processors, the RS-232 central control interface and two RS-485 cascading interfaces are connected to the bus arbitration processor and the RS-485 bus control end, the multiple One end of each photoelectric conversion module is connected to the bus arbitration processor, the other end is connected to one end of ...

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Abstract

The invention discloses a passive light-splitting RS-485 optical fiber bus local side system. The system is characterized in that the two ends of the system are connected with an RS-485 bus control terminal and a passive RS-485 optical network terminal of an industry optical fiber bus for passive light splitting respectively. The system comprises a power module, a main control panel, a plurality of plane waveguide optical dividers and a plurality of light ports which are connected. The main control panel comprises an RS-232 center control interface, an RS-485 center control interface, two RS-485 cascade interfaces, a plurality of photoelectric conversion modules and a bus arbitration processor. The RS-232 interface and the two RS-485 cascade interfaces are connected with the bus arbitration processor and the RS-485 bus control terminal. One ends of the multiple photovoltaic conversion modules are connected with the bus arbitration processor, and the other ends of the multiple photovoltaic conversion modules are connected with one ends of the plane waveguide optical dividers. The other ends of the plane waveguide optical dividers are connected with the light ports.

Description

technical field [0001] The invention relates to the field of industrial manufacturing, in particular to a passive optical splitting RS-485 optical fiber bus local end system. Background technique [0002] Smart meters developed with the maturity of single-chip microcomputer technology in the early 1980s, and now the world's meter market is basically monopolized by smart meters. The reason is the need for enterprise informatization. One of the necessary conditions for enterprises to select instruments is to have a network communication interface. Initially, the data analog signal output is simple process quantity, and later the instrument interface is RS-232 interface, which can realize point-to-point communication, but this method cannot realize the networking function. Then came RS-485 to solve this problem. [0003] RS-485 uses differential signal negative logic, -2V~-6V means "0", +2V~+6V means "1". RS-485 has two kinds of wiring, two-wire system and four-wire system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/278H04B10/25
Inventor 王春
Owner 广东启鼎光电科技有限公司
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