UNS0881B-PV2 3BHE050077R0102 是ABB生產(chǎn)的一款可編程控制器，也被稱作數(shù)字邏輯控制器，它在自動控制領(lǐng)域有著廣泛的應(yīng)用。這款控制器由內(nèi)部的CPU、指令和數(shù)據(jù)存儲器、輸入輸出單元、電源模塊、數(shù)字模擬單元等多個模塊組合而成，能夠接收（輸入）和發(fā)送（輸出）多種類型的電氣或電子信號，并利用這些信號來控制或監(jiān)控幾乎所有類型的機(jī)電系統(tǒng)。
UNS0881B-PV2 3BHE050077R0102 可編程控制器的特點(diǎn)包括強(qiáng)大的通用性、易用性、廣泛的適用性、高可靠性、強(qiáng)大的抗干擾能力以及簡單的編程等。其最大的優(yōu)勢之一是輸入/輸出功能模塊齊全，能夠?yàn)椴煌默F(xiàn)場信號（如直流或交流、開關(guān)量、數(shù)字量或模擬量、電壓或電流等）提供相應(yīng)的模板，并能直接與工業(yè)現(xiàn)場設(shè)備（如按鈕、開關(guān)、感應(yīng)式電流變送器、電動機(jī)啟動器或控制閥等）連接。它通過總線與CPU主板相連 。
此外，該控制器還具備數(shù)字輸入模塊，這是一種用于連接外部機(jī)械觸點(diǎn)和電子數(shù)字傳感器的電子設(shè)備，是PLC（可編程邏輯控制器）控制系統(tǒng)的一部分。數(shù)字輸入模塊的主要功能是將現(xiàn)場外部的數(shù)字信號轉(zhuǎn)換為PLC內(nèi)部信號水平，并將其傳輸?shù)紺PU進(jìn)行程序處理。數(shù)字輸入模塊通常具有輸入通道，用于接收外部的開關(guān)量或數(shù)字信號，例如開關(guān)的開合、按鈕的按壓、傳感器信號等。輸入電路通常配備有RC濾波電路，以防止因輸入觸點(diǎn)抖動或外部干擾脈沖引起的錯誤輸入信號 。
UNS0881B-PV2 3BHE050077R0102 is a programmable controller produced by ABB, also known as the digital logic controller, it has a wide range of applications in the field of automatic control. This controller is composed of multiple modules such as internal CPU, instruction and data memory, input and output unit, power module, digital analog unit, etc., which can receive (input) and send (output) various types of electrical or electronic signals, and use these signals to control or monitor almost all types of electromechanical systems.
UNS0881B-PV2 3BHE050077R0102 Programmable controller features include strong versatility, ease of use, wide applicability, high reliability, strong anti-interference ability and simple programming. One of its biggest advantages is that the input/output function module is complete, can provide the corresponding template for different field signals (such as DC or AC, switching, digital or analog, voltage or current, etc.), and can be directly connected to industrial field equipment (such as buttons, switches, inductive current transmitters, motor starters or control valves, etc.). It is connected to the CPU motherboard via a bus.
In addition, the controller has a digital input module, which is an electronic device for connecting external mechanical contacts and electronic digital sensors, and is part of the PLC (Programmable Logic Controller) control system. The main function of the digital input module is to convert the digital signal outside the field to the PLC internal signal level, and transmit it to the CPU for program processing. Digital input modules usually have input channels for receiving external switching quantities or digital signals, such as switching on and off, button pressing, sensor signals, etc. The input circuit is usually equipped with an RC filter circuit to prevent incorrect input signals caused by input contact jitter or external interference pulses.
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