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RS232 and RS485 compatible system

A RS485, data technology, applied in the field of industrial control communication, can solve the problems of low efficiency of full-duplex bus and high cost of processing control, and achieve the effect of preventing signal series connection and reducing power consumption

Inactive Publication Date: 2015-01-21
PHICOMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] RS-485 is used in a one-to-multipoint master-slave response communication system. Compared with full-duplex buses such as RS-232, the efficiency is much lower. Therefore, the RS232 to RS485 converter with good performance is very important, but the processing control cost is relatively high. high

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  • RS232 and RS485 compatible system
  • RS232 and RS485 compatible system
  • RS232 and RS485 compatible system

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Embodiment Construction

[0049] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0050] Such as figure 1 shown, combined with Figure 2-8 As shown, a system compatible with RS232 and RS485 includes: main control module 1 (CPU); RS232 conversion module 2 (MAX232 chip, model MAX3223E, such as figure 2 shown), the first data receiving terminal T1IN (TXD1) of the RS232 conversion module 2 is connected to the data transmitting terminal of the main control module 1, and the first data transmitting terminal R1OUT (RS232_RXD1) of the RS232 conversion module 2 is connected to The data receiving end of the main control module 1 is connected; the RS485 conversion module 3 (MAX485 chip, the model is SP3072E, such as image 3 shown), the second data receiving terminal DI (TXD1) of the RS485 conversion module 3 is connected to the data transmitting terminal of the main control module 1, and the second d...

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Abstract

The invention discloses an RS232 and RS485 compatible system. The RS232 and RS485 compatible system comprises a main control module, an RS232 conversion module connected with the control module, an RS485 conversion module connected with the main control module, a general interface connected with the RS232 conversion module and the RS485 conversion module, a first signal selection module connected with the main control module and the RS232 conversion module, a second signal selection module connected with the main control module and the RS485 conversion module, a first power source control module connected with the main control module and the RS232 conversion module, a second power source control module connected with the main control module and the RS485 conversion module, and a power source module connected with the main control module, the RS232 conversion module, the RS485 conversion module, the first signal selection module, the second signal selection module, the first power source control module and the second power source control module. By controlling a working power source of a chip, power consumption is reduced, and signal tandem connection can be prevented.

Description

technical field [0001] The invention relates to the technical field of industrial control communication, in particular to a system compatible with RS232 and RS485. Background technique [0002] To communicate with each other between two disconnected devices, there must be a bridge to connect them, which is the transmission path and communication protocol. The transmission path is composed of a transmission medium and a transmission interface. The transmission medium can be divided into two categories: wired and wireless transmission medium. The wired transmission medium is only used as a transmission medium in data transmission, not a signal carrier. The popular wired transmission media used in computer networks are: copper wire and glass fiber. There are two basic types of copper wire used in applications: twisted pair and coaxial cable. [0003] In the prior art, the industrial field control systems generally adopt RS232 and RS485 bus standards for data transmission. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418G06F13/42
CPCG05B19/4186G05B19/4188Y02D10/00Y02P90/02
Inventor 何鑫
Owner PHICOMM (SHANGHAI) CO LTD
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