PLC用軟件功能取代了繼電器控制系統中大量的中間繼電器、時間繼電器、計數器等器件，使控制柜的設計、安裝、接線工作量大大減少。主電路是給異步電動機提供調壓調頻電源的電力變換部分，變頻器的主電路大體上可分為兩類：電壓型是將電壓源的直流變換為交流的變頻器，直流回路的濾波是電容。鄭工1995 928 1761

WAGO,281-107,TERMINAL BLOCK, DIN, GRN/YEL
WAGO,281-101,TERMINAL BLOCK, DIN, 32A, GREY
WAGO,280-901,TERMINAL BLOCK, DIN, 24A, GREY
WAGO,280-835/056-000,SPACER, FOR 280-833, ORANGE
WAGO,280-833,TERMINAL BLOCK, DIN, 4COND, 20A
WAGO,280-684,TERMINAL BLOCK, DIN, 2.5MM, 3COND
WAGO,280-681,TERMINAL BLOCK, DIN, 3COND, 24A
WAGO,280-641,TERMINAL BLOCK, DIN, 26A, GREY
WAGO,280-637,TERMINAL BLOCK, DIN, GRN/YEL
WAGO,280-402,JUMPER, ADJACENT, INSULATED, GREY
WAGO,280-333,END & INTERMEDIATE PLATE,FOR 280
WAGO,280-326,ENDPLATE, ORANGE, 2.5MM WIDE
WAGO,280-314,END PLATE, 2.5MM
WAGO,280-313,END PLATE, ORANGE, 2.5MM WIDE
WAGO,280-312,END PLATE, GREY, 2.5MM WIDE
WAGO,280-308,END PLATE, 2.5MM, GREY
WAGO,280-301,END PLATE, GREY, 2.5MM WIDE
WAGO,280-107,TERMINAL BLOCK, EARTH, DIN, GRN
WAGO,279-901,TERMINAL BLOCK, DIN, 18A, GREY
WAGO,279-837,TERMINAL BLOCK, EARTH, DIN, 4COND
WAGO,279-831,TERMINAL BLOCK, DIN, 4COND, 18A
WAGO,279-402,JUMPER, ADJACENT, INSULATED, GREY
WAGO,279-344,END PLATE, 1.5MM
WAGO,279-104,TERMINAL BLOCK, DIN, 18A, BLUE
WAGO,273-255,CONNECTOR, 5POLE, 2.5MM, CLEAR
WAGO,273-155,CONNECTOR, 5POLE, 1.5MM, CLEAR
WAGO,273-101,CONNECTOR, 5POLE, 1.5MM, GREY
WAGO,264-731,TERMINAL BLOCK, DIN, 4COND, 24A
WAGO,264-727,TERMINAL BLOCK, EARTH, DIN, 4COND
WAGO,264-711,TERMINAL BLOCK, DIN, 2COND, 24A
WAGO,264-701,TERMINAL BLOCK, DIN, 2COND, 24A
WAGO,264-402,JUMPER BAR, COMB TYPE, GREY