Remote matrix switch control module having RS422 interface

Abstract

The invention relates to a remote matrix switch control module having an RS422 interface. The module comprises two hardware submodules, which are an RS422 submodule and a matrix switch control submodule. Cores of the invention are as follows: a remote control based on an RS422 bus and flexible switching of large-scale matrix switches. The RS422 submodule comprises an RS422 isolation communication unit, an FPGA protocol coding unit and a buffer driving unit. And the matrix switch control submodule is composed of a CPLD protocol decoding unit, a column signal driving unit, a row signal driving unit and a relay array unit. According to the module provided in the invention, performances are stable; reliability is high; besides, the module has an RS422 bus interface and a communication rate can reach 2MB / s; therefore, the module is suitable for general signal switch and route selection and external device control and the like. Moreover, a switching demand on a switching value by traditional testing equipment can be met; meanwhile, the module can be widely applied to remote testing platforms including a temperature cabinet, a vibration table, and a rotary table and the like; and thus, deficiency based on PCI, CPCI and PXI bus interface equipment can be made up.

Description

technical field [0001] The invention relates to a remote matrix switch control module with RS422 interface. This module adopts RS422 bus for remote control, and switches the measured signal through the matrix switch. The RS422 bus provides a reliable solution for high-speed remote control, and also overcomes the dependence on traditional PCI, PXI, and CPCI interface devices. Using the matrix switch control module, any input and output can be connected individually or in combination, which greatly expands the flexibility of testing. The invention belongs to the field of computer aided testing and automatic testing. Background technique [0002] As the name implies, the matrix switch refers to a switch product with a structure of row (Row) and column (Column) cross arrangement. Its characteristic is that each node (CrossPoint) is connected to a row / column. Signal routing can be achieved. The use of matrix switches is very flexible and convenient. It is the product with the...

AI Technical Summary

Problems solved by technology

[0013] Most of the existing matrix switch control modules on the market are for local control, and the scale is small, which cannot meet the needs of remote measurement based on thermostats, turntables, etc.; at the same time, most products are based on PXI and VIX interface modules. The equipment itself is very demanding, and the universal applicability is not strong

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