A kind of accuracy testing equipment of plc input and output channels

Abstract

The invention relates to the technical field of PLC input and output module channel detection, especially to a device for testing the conversion precision of a PLC input and output channel. The devicecomprises a test terminal board and a movable contact module, a row of conductive strips are arranged on the front surface of the test terminal access plate, two conductor slides are vertically disposed on the back surface, and the conductive strips are in one-to-one correspondence electrical connection with the test terminals of the test terminal board, and the two moving conductors are vertically moved along the respective conductor slides to achieve communication of the conductor slides and any conductive strip to access the current loop formed by any two test terminals on the test terminal board into the electrical signal test instrument. The device for testing the conversion precision of the PLC input and output channel simplifies the test process of the PLC input and output channelconversion accuracy to avoid the operator's mistakes caused by clamping the test terminals by mistake, the test results are accurate, the test process saves time and effort, the test equipment damagecaused by improper operation is avoided, and the operation is safe.

Description

Technical field [0001] The invention relates to the technical field of PLC input and output module channel detection, in particular to a precision testing equipment for PLC input and output channels. Background technique [0002] The monitoring system of the pumped storage power station adopts the ALSTOM C80-35 series PLC. The ALSTOM C80-35 series PLC is the direct control unit from the field controlled equipment to the upstream and downstream of the monitoring system. It consists of a CPU module, an input / output module, an input / output interface board, etc. Composition; the signal goes upstream through the interface board to the input module, and then enters the CPU module, and finally the communication is sent to the monitoring system; the signal goes downstream through the output module to the output interface board, and finally hard-wired downstream to the controlled device. [0003] According to industry standards and power plant regulations, the PLC input and output module ch...

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Problems solved by technology

[0005] Aiming at the defects and problems in the prior art, because there are many analog signals, it is time-consuming and labor-intensive to constantly adjust the test terminals during the test, and it is easy to cause equipment damage. The present invention provides a precision test equipment for PLC input and output channels

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