1969年,美国数字设备公司(DEC)研制出*台可编程控制器,用于通用汽车公司的生产线,取代生产线上的继电器控制系统,开创了工业控制的新纪元。1971年,日本开始生产可编程控制器,德、英、法等各国相继开发了适于本国的可编程控制器,并推广使用。1974年,我国也开始研制生产可编程控制器。早期的可编程控制器是为取代继电器-接触器控制系统而设计的,用于开关量控制,具有逻辑运算、计时、计数等顺序控制功能,故称之为可编程逻辑控制器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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