Universal multi-channel switching value converter

Abstract

The invention discloses a universal multi-channel switching value converter. Three pins of a three-pin socket connector are connected with the anode and cathode of a power module and a switching value signal respectively. The common terminal of the switching value signal is connected with the negative input end of an optocoupler by a current limiting resistor. A Pi-type filter is connected between the positive and negative input ends of the optocoupler. An open collector is arranged at the output end of the optocoupler, and is connected to 5V by a pull-up resistor. The universal multi-channelswitching value converter is highly universal, and can determine a switching value to be converted only by changing the connection statuses of the two socket connectors without changing a hardware structure. The switching value has a value of amplitude which is any value between 15V and 35V and frequency which is any value between 0MHz and 1MHz. The universal multi-channel switching value converter has a simple hardware circuit comprising basic components, does not require any dedicated chip, is low in cost and greatly improves the reliability of the whole system.

Description

technical field [0001] The invention relates to a multi-channel switching value conversion device. Background technique [0002] In an industrial control system, it is usually necessary to input a single on / off switch, a high / low level or a group of physical quantities of the controlled object into an application interface in a computer or controller. The switching value generated by the controlled object, such as limit switch, rotary switch, temperature switch, various buttons, and relay output, can be divided into the following two types: on-off type (passive) switching value, which reflects the various parameters of the controlled object. The on and off states of various switches and contacts; the level type (active) switch quantity reflects the high and low states of the logic level. The switching value acquisition card inputs these switching values ​​to the computer or controller for processing. Usually, the switching value collected by the switching value acquisition ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the incompatibility of two kinds of switching values ​​in the prior art, and the disadvantages of complex structure and high cost, the present invention provides a general-purpose multi-channel switching value converter, which can not only convert on-off type switching values, but also convert level Type switching value, many channels at the same time, low cost and good performance

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