JANCD-SR20-486386
PLC電源用于為PLC各模塊的集成電路提供工作電源。同時，有的還為輸入電路提供24V 的工作電源。電源輸入類型有:交流電源(220VAC或110WAC),直流電源(常用的為24VDC).6底板或機(jī)架大多數(shù)模塊式PLC使用底板或機(jī)架，其作用是:電氣上,實(shí)現(xiàn)各模塊間的聯(lián)系，使PU 能訪問底板上的有模塊，機(jī)械上，實(shí)現(xiàn)各模塊間的連接，便各模塊構(gòu)成一一個整體。7 PLC的通信聯(lián)同依靠*的工業(yè)網(wǎng)絡(luò)技術(shù)可以迅速有效地收集、傳送生產(chǎn)和管理數(shù)據(jù)。因此，網(wǎng)絡(luò)在自 動化系統(tǒng)集成工程中的重要性越來越顯著，甚至有人提出網(wǎng)絡(luò)就是控制奉’的觀點(diǎn)說法。PLC具有通信聯(lián)網(wǎng)的功能，它使PLC與PLC之間、PLC與上位計(jì)算機(jī)以及其他智能設(shè)備之 間能夠交換信息，形成一一個統(tǒng)一的整體， 實(shí)現(xiàn)分散集中控制。多數(shù)PLC具有RS 232接口，還 有一些內(nèi)置有支持各自通信協(xié)議的接口。PLC的通信現(xiàn)在主要采用通過多點(diǎn)接口(MPI) 的數(shù) 據(jù)迪訊、PROFIBUS或工業(yè)以太網(wǎng)進(jìn)行聯(lián)網(wǎng)。

JANCD-SR20-486386
The PLC power supply is used to provide working power for the integrated circuit of each PLC module. At the same time, some also provide 24V working power supply for the input circuit. Power input types: AC power supply (220VAC or 110wac), DC power supply (24VDC is commonly used) 6 baseplate or rack
Most modular PLCs use baseboards or racks. Their functions are: electrically, to realize the connection between modules, so that Pu can access the modules on the baseboard; mechanically, to realize the connection between modules, so that each module can form a whole. 7 communication connection of PLC
Relying on the industrial network technology of * can quickly and effectively collect, transmit production and management data. Therefore, the importance of network in the automation system integration engineering is becoming more and more obvious. Some people even put forward the view that network is control.
PLC has the function of communication networking, which enables information exchange between PLC and PLC, between PLC and upper computer and other intelligent devices to form a unified whole and realize decentralized and centralized control. Most PLCs have RS 232 interfaces, and some have built-in interfaces that support their own communication protocols. At present, PLC communication mainly adopts data communication through multipoint interface (MPI), PROFIBUS or industrial Ethernet for networking.