Switching output self-diagnosis circuit

Abstract

A switching output self-diagnosis circuit relates to the technical field of industrial control. The technical problem to be solved is to make system maintenance convenient. The circuit comprises an output relay, an analog-to-digital converter, a Hall current sensor, a logic operation module, and a reference signal generation source. The circuit has three output contacts, wherein the first output contact is connected to a static contact of the output relay through a primary side of the Hall current sensor, and the second and third output contacts are respectively connected to two moving contacts of the output relay. The first and second output contacts are connected to an analog side of the analog-to-digital converter through a direct-current signal conditioning module, the first and third output contacts are connected to the analog side of the analog-to-digital converter through an alternating-current signal conditioning module, and the reference signal generation source and a secondary side of the Hall current sensor are respectively connected to the analog side of the analog-to-digital converter. The logic operation module is connected to a digital side of the analog-to-digital converter through a data bus. The circuit provided by the invention is suitable for diagnosing the output voltage and current of a switching module.

Description

technical field [0001] The invention relates to industrial control technology, in particular to a technology of switching value output self-diagnosis circuit. Background technique [0002] Modern industrial industries (such as chemical control, nuclear power industry, etc.) require the entire process of control (input, controller, output) to have high reliability and availability. Replacement to ensure that the industrial process is not greatly affected. However, the existing control system does not have a module-level self-diagnosis function, which requires a lot of manpower and material resources to troubleshoot equipment faults when a fault occurs, which brings inconvenience to system maintenance. Contents of the invention [0003] Aiming at the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a switch value output self-diagnosis circuit which can facilitate system maintenance. [0004] In order to sol...

AI Technical Summary

Problems solved by technology

However, the existing control system does not have a module-level self-diagnosis function, which requires a lot of manpower and material resources to troubleshoot equipment faults when a fault occurs, which brings inconvenience to system maintenance

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