Relay module with priority control function

Abstract

The invention discloses a relay module, in particular a relay module with priority control function. The relay module with priority control function comprises a switching value isolated channel, a relay set and a programmable logic device. Input signals are input through the switching value isolated channel, the priority level of the input signals is judged by the programmable logic device, and then the input signals are input to the relay set to control the working state of a rear-end relay set. The relay module can remove the mechanical dithering of the input signals, and the dithering removal time is set according to the requirement of a system; the relay module can output switching value signals according to the priority level of the input signals and the preset logic relationship to control the working state of the rear-end relay; a corresponding relay is selected according to different load categories of relay contacts; and a test interface is also provided for periodical on-line test or off-line test.

Description

technical field [0001] The invention relates to a relay module, in particular to a relay module with a priority control function. Background technique [0002] Relay modules are widely used in nuclear power plant instrumentation and control systems, but typical designs provide switch-on isolation input channels and relay output channels, or only provide relay output channels. [0003] The relay module with priority control function is referred to as PCM (Priority Control Model), which is the priority control module. It is a part of the instrument and control system of the nuclear power plant. It is electrically connected to various equipment in the nuclear power plant and belongs to non-safety-related equipment. The main purpose of PCM is to receive switching signals from different devices with different priorities, judge their priority and control the output of the back-end relay. Currently, there are many kinds of relay modules known in the field of industrial control. ...

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the input signal and the output signal of the existing relay module have a one-to-one correspondence relationship, and the priority levels between the input signals and the output signals are the same. When there is a logical relationship between the input signal and the output signal or between the input signals When there is a priority level, this type of relay module cannot be used, and only changes can be made in the module design of the previous stage

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