A passive optical splitter rs-485 optical fiber bus multi-port terminal

A technology of RS-485 and optical fiber bus, which is applied in the field of industrial manufacturing, can solve the problems of communication rate drop and cannot guarantee high-speed long-distance communication requirements, and achieve cost saving, improved anti-lightning protection ability, and simple system

Active Publication Date: 2017-09-01
广东启鼎光电科技有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A passive optical splitter rs-485 optical fiber bus multi-port terminal
  • A passive optical splitter rs-485 optical fiber bus multi-port terminal
  • A passive optical splitter rs-485 optical fiber bus multi-port terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] Example: see Figure 1 to Figure 7 , the present embodiment provides a passive optical splitting RS-485 optical fiber bus multi-port terminal, the two ends of which are respectively connected to the passive RS-485 optical network local end and user terminal equipment of the passive optical splitting RS-485 optical fiber bus, which includes a power supply Module, bus arbitration processor, multiple optical conversion modules, multiple high-speed optocouplers, 8-way RS-485 interface unit, two-way RS-485 cascading interface circuits, two-way optical fiber cascading interface circuits, multiple RS-485 Driver chip, multiple third-level lightning protection circuits and one optical fiber uplink port circuit, wherein the multiple optical conversion modules, one RS-485 cascade interface circuit and multiple high-speed optocoupler connection bus arbitration processors, the optical fiber uplink port The circuit and the two-way optical fiber cascading interface are connected to th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a multi-port terminal of a passive beam splitting RS-485 optical fiber bus. The multi-port terminal is characterized in that the two ends of the multi-port terminal are connected with passive RS-485 optical network local sides of the passive beam splitting RS-485 optical fiber bus and user terminal devices, the multi-port terminal comprises a power supply module, a bus arbitration processor, a plurality of optical conversion modules, a plurality of high-speed optical couplers, multiple RS-485 interface units, two RS-485 cascading interface circuits, two optical fiber cascading interface circuits, multiple routes of RS-485 drive chips, multiple three-stage lightning protection circuits and an optical fiber uplink port circuit, the optical conversion modules, the two RS-485 cascading interface circuits and the high-speed optical couplers are connected with the bus arbitration processor, the optical uplink port circuit and two optical fiber cascading interfaces are connected with the optical conversion modules, and the RS-485 drive chips are connected with the high-speed optical couplers and the three-stage lightning prevention circuits.

Description

technical field [0001] The invention relates to the field of industrial manufacturing, in particular to a passive light splitting RS-485 optical fiber bus multi-port terminal. 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25H04B10/278
Inventor 王春
Owner 广东启鼎光电科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap