可編程序控制器一直在發展中,所以至今尚未對其下后的定義。國際電工學會(IEC)曾先后于1982.11;1985.1和1987.2發布了可編程序控制器標準草案的,二,三稿。
在第三稿中,對PLC作了如下定義:可編程序控制器是一種數字運算操作電子系統,專為在工業環境下應用而設計。它采用了可編程序的存儲器,用來在其內部存儲執行邏輯運算、順序控制、定時、計數和算術運算等操作的指令,并通過數字的,模擬的輸入和輸出,控制各種類型的機械或生產過程。可編程序控制器及其有關的外圍設備,都應按易于與工業控制系統形成一個整體、易于擴充其功能的原則設計。
定義強調了PLC是:1 數字運算操作的電子系統——也是一種計算機
2 專為在工業環境下應用而設計
3 面向用戶指令——編程方便
4 邏輯運算、順序控制、定時計算和算術操作
5 數字量或模擬量輸入輸出控制
6 易與控制系統聯成一體
7 易于擴充
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AEROQUIP A-T-J DIVISION HYDRAULIC CYLINDER TE22CAXD
ROTAC ROTARY ACTUATOR DUEL SHAFT LP-24-IV
NUMATICS LINEAR SLIDE LC10602H16DXX
BOSCH PNEUMATIC STOP GATE 3842 525 109 *NNB*
SMC JAF140-30-150 FLOATING JOINT, NIB
SMC PNEUMATIC CYLINDER CNDAFN80N-125-D
PARKER K065 N035 PILOT VALVE, NNB
NUMATICS .916" NPT FILTER F30B-06
SMC CYLINDER CLAFN80-75-D-XC?18
SMC PNEUMATIC CYLINDER MYH32-K5232-400
FESTO 63MM BORE 300MM STROKE PNEUMATIC CYLINDER, DNC-63-300-PPV-?A-KP, NNB
ASCO 24DC-FT 11.2W SOLENOID N262.444 E / 400-425-142
NUMATICS 100-120V .30A 150 PSIG-AIR SOLENOID VALVE, I35SA415K
PARKER HYDRAULIC FILTER 926988Q NIB
EATON AEROQUIP FJ9122-1212 37JIC FEMALE SWIVEL ,NNB
BIMBA PNEUMATIC CYLINDER 245-DP
DEZURIK CYLINDER ACTUATOR 941816R001 44482
HOWA ROTATING HYDRAULIC CHUCK CYLINDER HH11C 80
PMV 800kPA ELECTRO-PNEUMAT?IC DOUBLE ACTING VALVE POSITIONER P-2020 NIB
WHITEY 200PSI MAX 90 PNEUMATIC SPRING RETURN ACTUATOR 133 SR W/ MB-133
CMT 80 PSI, 2.5" STROKE DOUBLE ACTING IMPACT MARKER 288SUBK.OB.25.R
YUKEN CYLINDER CJT70-TC40B320B?-ABA-EK 20A
PARKER SCHRADER BELLOWS 24 VDC SOLENOID PNEUMATIC VALVE W2154L579B
YUKEN HYDRAULIC CYLINDER CJT70-FA32B325B?-BCB-EK 20A
FESTO PNEUMATIC CYLINDER DZH-50-200PPV-A
NUMATICS 120V, .16A, 50/60Hz, SOLENOID VALVE 554BB43AK
PHD PNEUMATIC PARALLEL GRIPPER 7980-03-0201
FESTO CYLINDER DKE-100-350-PPV?-A
NUMATICS 24VDC 4.0W 150 PSIG-AIR PNEUMATIC SOLENOID VALVE, I24BB415MP56Y
NUMATICS 110/120V .06A 150 PSIG-AIR DOUBLE SOLENOID VALVE, I34BB400KP14D
MAC 24VDC 2.5W 25-150 PSI PNEUMATIC SOLENOID VALVE, 6313D-611-PM-59?1DA
PARKER PNEUMATIC 150PSI 1000KPA FILTER/REGULATO?R 07F41BC 104112
ENERPAC STLS-121 2400LB THREADED BODY SWING CYLINDER, NNB
CKD SSD-ML-40-40 PNEUMATIC CYLINDER
PARKER E-43-B-0500 INSTRUMENT GRADE POLYETHYLENE TUBING .170" X 500', NIB
NUMATICS 110/120V .08A SOLENOID VALVE, 237-325B
SMC CYLINDER CDLAFN100-175-E
BIMBA SS PNEUMATIC CYLINDER SS311-R
PARKER * SAE CODE 61 FLANGE HEAD * 11571-16-16
NUMATICS SOLENOID AIR PILOT ACTUATED VALVE R20BB500MP00061 / R20BBD00MP00061
SMC 3.5MPa PNEUMATIC CYLINDER CHDAL40-400-J59?WL
INTEGRAL HYDRAULIK HYDRAULIC CYLINDER1009882?1 160BAR 018-1354-062-00?3
NUMATICS 238610 110/120V 50/60HZ SOLENOID VALVE COIL, MP-C-080-032-D
MILCO PNEUMATIC CYLINDER CCC-204-4.0 REV B 100712
90 BRASS ELBOW ASSORTMENT, LOT OF 9
NUMATICS SERIES ISO5599/11 150 PSIG SOLENOID VALVE I24BB415MP
PARKER JIC P 16 SS FLUID CONNECTING NUT, LOT OF 17
HYDRAULIC THREAD NUT HMV 134/A-101
NUMATICS 150 PSIG SOLENOID VALVE I24SS415K
NUMATICS 110/120V .37A 150 PSIG-AIR SOLENOID VALVE W/ BASE, 554SA43AK000030
PARKER * PARKER TRIPLE-LOK 90 ELBOW * UNKNOWN
NUMATICS PNEUMATIC SOLENOID VALVE I35RS115J00 0000 100881
HYDAC BETAFIT 1.06.39D03BN HYDRAULIC FILTER ELEMENT, NIB
NORGREN 175oF, 300PSIG, REGULATOR R24-401-RNXA
FESTO 32MM BORE 250MM STROKE PNEUMATIC CYLINDER, DNU-32-250-PPV-?A
YUKEN HYDRAULIC CYLINDER CJT70-FA32B50B-?PD-EK
SMC CYLINDER CDNAFN80N-100-D?-J59WLS
LUBRIQUIP PUMP ASSEMBLY AL-25, 521-000-020, L-90
FESTO 63MM BORE 50MM STROKE PNEUMATIC CYLINDER, DKE-63-50-PPV-A
MAC 24 VDC 6.0W SOLENOID VALVE 280B-506AAAA
SMC 50MM BORE 200MM STROKE PNEUMATIC CYLINDER CNAFN50N-200-D
YUKEN HYDRAULIC CYLINDER CJT70-FA32B600B?-BAD
BI * BI union FITTING * UNKNOWN
FESTO 40MM BORE 400MM STROKE PNEUMATIC CYLINDER, DNC-40-400-PPV-?A, NNB
PARKER P11771 -20-20 CRIMP FITTING SAE CODE 61 FLANGE HEAD 45 ELBOW
YUKEN CYLINDER CJT70-FA80B80H-?CBA-N 2012-411A
MAC PR65C-11BA 150 PSI PR65C SERIES PRESSURE REGULATOR, NNB
FESTO 145 PSI, SERIES ED08-14918 PNEUMATIC CYLINDER ADV-40-50-A
BOSCH RACINE 221887
SMC VXZ2240L SINGLE UNIT ZERO DIFFERENTIAL PILOT OPERATED DIAPHRAGM VALVE
ASHCROFT DURAGAUGE BRONZE TUBE 30-0VACUUM-IN/H?G. GAUGE 45-1379 103764
PARKER 11971-32-32 SAE CODE 61 FLANGE HEAD 90 ELBOW
MAC 6311A-512-PM-11?1DA 110/120 VOLTS 50/60 SOLENOID VALVE
MLOK CYLINDER RCN-138600CA
NUMATICS 24VDC, 4.0W, 150PSIG-AIR, PNEUMATIC VALVE I34BA400MP00061
SMC PNEUMATIC SERVICE KIT NIB CK95-80 105415
PARKER 150PSI 1034kPa PNEUMATIC SOLENOID VALVE B511ABB53C
NUMATICS 150PSIG PNEUMATIC SOLENOID VALVE NNB I35SA43BK000030 100509
NUMATICS PNEUMATIC PRESSURE REGULATING VALVE 031RD700O000000 NIB
MLOK CYLINDER RCN-138600-800-?05
NUMATICS 110/120V .06A 60HZ 150 PSIG SOLENOID VALVE, 031SA415O011Z
NUMATICS 120 V, 50-60HZ, .08A SOLENOID VALVE 1525A425K
NUMATICS PNEUMATIC AIR FILTER REGULATOR F22B-01AM 99883
NUMATICS MAX OPERATING PRESSURE 150 PSIG SOLENOID VALVE 135BB515MP00061
FESTO CPV18-VI U502 DISTRIBUTION MANIFOLD ASSEMBLY 185 886 T402
GRACO 250PSI 17.5BAR AIR LINE REGULATOR A01 A 214848
FESTO 63MM BORE 920MM STROKE PNEUMATIC CYLINDER, DKE-63-920-PPV-?A
ADVANCE AUTOMATION AAC SK-1176 PNEUMATIC CYLINDER SERIES I, NNB
TAIYO PNEUMATIC CYLINDER 40X30 NPB031A000-0