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接著,美國(guó)國(guó)MODICON公司也開(kāi)發(fā)出可編程序控制器084。
1971年,日本從美國(guó)引進(jìn)了這項(xiàng)新技術(shù),很快研制出了日本臺(tái)可編程序控制器DSC-8。1973年,西歐國(guó)家也研制出了他們的臺(tái)可編程序控制器。我國(guó)從1974年開(kāi)始研制,1977年開(kāi)始工業(yè)應(yīng)用。早期的可編程序控制器是為取代繼電器控制線路、存儲(chǔ)程序指令、完成順序控制而設(shè)計(jì)的。主要用于:1. 邏輯運(yùn)算 2. 計(jì)時(shí),計(jì)數(shù)等順序控制,均屬開(kāi)關(guān)量控制。所以,通常稱為可編程序邏輯控制器(PLC—Programmable Logic Controller)。 進(jìn)入70年代,隨著微電子技術(shù)的發(fā)展,PLC采用了通用微處理器,這種控制器就不再局限于當(dāng)初的邏輯運(yùn)算了,功能不斷增強(qiáng)。因此,實(shí)際上應(yīng)稱之為PC——可編程序控制器。
至80年代,隨大規(guī)模和超大規(guī)模集成電路等微電子技術(shù)的發(fā)展,以16位和32位微處理器構(gòu)成的微機(jī)化PC得到了驚人的發(fā)展。使PC在概念、設(shè)計(jì)、性能、價(jià)格以及應(yīng)用等方面都有了新的突破。
DELPHI OXYGEN SENSOR ES10207 NIBINTERMATIC 240VAC 8.3A 2000W PHOTO CONTROL, K4522, NIBPERCEPTRON DIGITAL SURFACE SENSOR REV.F / REV.1 917-3011 / 515-0095
SENSOR C32255
FOXBORO 12.5-42VDC PRESSURE TRANSMITTER IGP20-I20D21F
PEPPERL+FUCHS PROXIMITY SENSOR 84008 NIB
IFM PRESSURE SENSOR PN7724
AMPROBE 0-1500A AC AMMETER VARI-SPEED RECORDER LAA1500-T
PEPPERL+FUCHS RETRO REFLECTIVE PHOTO ELECTRIC SENSOR BASE, MPB27, NNB
HOMMEL-ETAMIC 116538A
IFM ELECTRONIC PROXIMITY SENSOR IG5568
TEL-TRU 0-240°F STEM THERMOMETER NIB
IFM ELECTRONICS SENSOR E10907 NIB
DELPHI OXYGEN SENSOR ES10193 NIB
SCHUNK INDUCTIVE PROXIMITY SENSOR 67662127 SEALED
PEPPERL+FUCHS SENSOR PART NO. 87993
DELPHI OXYGEN SENSOR ES10147 NIB
SMC AUTOSWITCH/SENS?OR D-A73
DELPHI OXYGEN SENSOR ES10202 NIB
DELPHI OXYGEN SENSOR ES10349 NIB
DELPHI OXYGEN SENSOR ES10004 NIB
DELPHI OXYGEN SENSOR ES10205 NIB
KEYENCE * LASER SENSOR * LB-1201
TRI-TRONICS SMARTEYE LUMINESCENCE STEATH-UV SENSOR UVS-2 103143
IFM EFECTOR LEVEL SENSOR LK7022
WEBER PROXIMITY SENSOR WN116454 SEALED
PEPPERL + FUCHS PROXIMIT SWITCH 284611-075 NIB
IFM EFECTOR PHOTO ELECTRIC SENSOR OI0001
SENSYCON 18321-0-002120 P/I SIGNAL CONVERTER, NNB
MIDDEX ELECTRONIC SENSOR WKL 22-99 / 1240 WKL 90 NIB
BANNER RSBRSR 15' RANGE MAXI-BEAM SENSOR HEAD, NIB
BALLUFF PROXIMITY SWITCH RXE-1805P-PU-02 NIB
BAUMER FIBER OPTIC DIFFUSE SENSOR FVDM 15P5103
BTG MEK-2300 100-240VAC CONSISTENCY TRANSMITTER JCT-1000
SICK * 30-FGS LIGHT CURTAIN * FGSE 900-221
NAMCO EE210-68704 CYLINDICATOR PROXIMITY SENSOR, NIB
PEPPERL AND FUCHS 24V LIGHT CURTAIN SLC30-150-T/92
BECKMAN 40-PH METER / DETECTOR 103778
IFM EFECTOR INDUCTIVE PROXIMITY SENSOR IF5707 NNB
DVT LEGEND 510 SMARTIMAGE SENSOR CMOS 510MR
MARSH 0-1500PSI PRESSURE GAUGE LIQUID FILLED