LMC400CAA10000
LMC400CAA10000
LMC400CAA10000
2、 數字量信號連接應注意的問題
變頻器的輸入信號中包括對運行/ 停止、正轉/ 反轉、點動等運行狀態進行操作的數字量輸入信號(開關型指令信號),這些信號常來自PLC 的數字量輸出信號。PLC 通常利用其內部的繼電器接點(繼電器輸出型P L C )或具有開關特性的元器件(晶體管輸出型PLC)與變頻器相連,得到運行狀態指令,如圖1 和圖2 所示。在進行數字量信號的連接時應注意:
(1)使用繼電器輸出型P L C 與變頻器相連時,應注意接觸不良常帶來變頻器誤動作,因此在實際接線中要注意連接可靠。
(2)使用晶體管輸出型P L C 與變頻器相連時,應注意晶體管本身的電壓的高低、電流的大小等限制條件在其範圍內,保證係統的可靠性。
(3)設計變頻器的輸入信號電路時,應盡量避免採用繼電器等感性負載,因繼電器開閉產生的浪涌電流可能引起變頻器的誤動作。
(4)當P L C 輸出的開關信號進入變頻器時,有時會發生外部電源和變頻器控制電源之間的串擾,應注意對P L C和變頻器分開接地,避免兩者使用共同的接地線。
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VARIAN E17032960 GAS BOX 12 IN TUBE GAS LINE
VARIAN E17034890 BRACKET GRND HOOK MTG
VARIAN E17034940 SHIM-PINION COLLAR
VARIAN E17036030 INSULATOR
VARIAN E17036400 LINER SUPPORT GRAPHITE
VARIAN E17036400-1 LINEAR, SUPPORT, GRAPH
VARIAN E17036410 DIPOLE LINEAR GRAPH
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VARIAN E17036921 ARC CHAMBER SIDE PLATE
VARIAN E17036930 PLATE
VARIAN E17036950 2 HOLE PLATE
VARIAN E17036970 REFLECTOR STRAP
VARIAN E17036971 BRACKET
VARIAN E17036990 FILAMENT
VARIAN E17037010 FILAMENT CLAMP INSULATOR, E500 BERNAS
VARIAN E17037062 ARC CHAMBER END PLATE SHIELD T
VARIAN E17037063 SHIELD ENDPLATE
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VARIAN E17037140 SETUP SEAL, BCKUP RNG
VARIAN E17037141 1 SET-UPSEAL
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VARIAN E17037820 COVER,MAGNET
VARIAN E17039040 APERTURE DIPOLE
VARIAN E17039600 SCR MOD XTRAC
VARIAN E17041180 ROD, INSULATOR SUPPORT
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VARIAN E17041890 ELDRIVE - SPACER
VARIAN E17041980 SLIT, PLASMA FLOOD GUN
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VARIAN E17042140 INSULATOR
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VARIAN E17042160 INSULATOR
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VARIAN E17042250 FILAMENT STRAP#1
VARIAN E17042260 FILAMENT STRAP#2
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VARIAN E17042660 WAFER LAMP WINDOW
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VARIAN E17044230 RIM PIPE CLMP BASE 2
VARIAN E17044231 RIM, PIPE CLMP BASE 3
VARIAN E17044231 RIM, PIPE CLMP BASE 3
VARIAN E17044232 RIM PIPE CLMP BASE 4
VARIAN E17044232 RIM PIPE CLMP BASE 4
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VARIAN E17045253 PAD PICK
VARIAN E17045261 CHUCK RING
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VARIAN E17046640 SCREW,BALL
VARIAN E17046640 SCREW,BALL
VARIAN E17047320 EXTENDER GRAPHITE
VARIAN E17047330 MOUNT, FARADAY (FLOOD GUN)
VARIAN E17047340 RING, BIAS
VARIAN E17047350 APERTURE DEF
VARIAN E17047380 PIN, CONTACT, FARADAY
VARIAN E17047480 SHIM HEAD .005
VARIAN E17047490 SHIM HEAD .002
VARIAN E17047770 HOUSING ASSY