1969年,美國(guó)數(shù)字設(shè)備公司(DEC)研制出*臺(tái)可編程控制器,用于通用汽車公司的生產(chǎn)線,取代生產(chǎn)線上的繼電器控制系統(tǒng),開(kāi)創(chuàng)了工業(yè)控制的新紀(jì)元。1971年,日本開(kāi)始生產(chǎn)可編程控制器,德、英、法等各國(guó)相繼開(kāi)發(fā)了適于本國(guó)的可編程控制器,并推廣使用。1974年,我國(guó)也開(kāi)始研制生產(chǎn)可編程控制器。早期的可編程控制器是為取代繼電器-接觸器控制系統(tǒng)而設(shè)計(jì)的,用于開(kāi)關(guān)量控制,具有邏輯運(yùn)算、計(jì)時(shí)、計(jì)數(shù)等順序控制功能,故稱之為可編程邏輯控制器PLC (Programmable Logic Controller)。
The 100 Watt Power Supply Module GE Fanuc 90-70 IC697PWR711 is a rack-mounted unit that plugs directly into a 48-pin backplanemounted connector in the leftmost slot in the rack. GE Fanuc 90-70 IC697PWR711 provides +5 volt, +12 volt and -12 volt power, and logic level sequencing signals to the backplane. GE Fanuc 90-70 power supply may be used either in a single rack application, or may also be used to provide power to a second rack if the total load is within the supply rating.
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