IO channel circuit and DCS system
A channel circuit and circuit technology, applied in the field of electronic information, can solve the problem that DI modules and DO modules cannot be reused, and achieve the effect of increasing flexibility and maintainability, reducing construction costs and later maintenance costs
Pending Publication Date: 2021-12-31
HANGZHOU HOLLYSYS AUTOMATION
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Problems solved by technology
[0005] The purpose of this application is to provide an IO channel circuit to solve the problem that the DI module and the DO module cannot be reused in the input and output modules
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[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of this application.
[0027] The core of this application is to provide an IO channel circuit, figure 1 It is a schematic diagram of a DCS system structure. At present, the IO channels of the DCS system are connected to the system in the form of IO modules. An IO device module generally consists of 8 or 16 channels of the same type of IO channels, such as DI modules (digital input modules) , DO module (digital output module), AO module (analog output module), AI module (analog acquisi...
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The invention discloses an IO channel circuit and a DCS system, and relates to the field of electronic information, switching between a DI module and a DO module is realized by controlling opening and closing of a first switch tube and a second switch tube. When an input and output interface is connected with a field power supply as the DI module, the second switch tube is closed, the first switch tube is disconnected, and the voltage of the input and output interface is acquired. Then, after passing through the amplitude limiting circuit, the voltage is controlled in a range which can be identified by the control circuit, so that a corresponding digital signal is obtained, when the input / output interface is connected with a load, the DO module is switched off, the second switching tube is controlled to be switched on and switched off, and the load is correspondingly controlled, so that the functions of the DI module and the DO module are simultaneously realized on the same circuit. Compared with the prior art that the DI module and the DO module use different circuits, corresponding circuit disassembly does not need to be carried out when input and output need to be switched, the flexibility and maintainability of IO channel circuit configuration are improved, and the building cost and the later maintenance cost are reduced.
Description
technical field [0001] This application relates to the field of electronic information, in particular to an IO channel circuit and a DCS system. Background technique [0002] In recent years, with the advancement of electronic technology, the application of distributed control system (referred to as DCS) in electronic circuits has become more and more extensive. In the DCS system, the input and output module (referred to as IO module) is the most basic input of DCS system control. Output channel The DCS system collects digital signals through the input IO channel, uploads the collected data to the DCS main controller for calculation, and finally outputs control signals through the output IO to participate in on-site industrial production control. [0003] The digital input module (referred to as DI module) in the existing IO channel circuit provides a digital input channel to collect and transmit the on-site discrete and switch signals to the DCS main controller, and the DCS...
Claims
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Login to View More IPC IPC(8): G05B19/418
CPCG05B19/41845G05B2219/33273
Inventor 宫聪伟蔡晓强
Owner HANGZHOU HOLLYSYS AUTOMATION