NI-PXI-GPIB183923F-01全新原裝
NI-PXI-GPIB183923F-01全新原裝
NI-PXI-GPIB183923F-01全新原裝
一、摘要 PLC是一種專門在工業環境下應用而設計的數字運算操作的電子裝置。
它採用可以編制程序的存儲器,用來在其內部存儲執行邏輯運算、順序運算、計時、計數和算術運算等操作的指令,並能通過數字式或模擬式的輸入和輸出,控制各種類型的機械或生產過程。PLC及其有關的外圍設備都應按照易於與工業控制係統形成一個整體,易於擴展其功能的原則而設計。在工業生產的各個領域,機械加工企業為了提高生產效率,採用機械化流水作業的方式,對不同類型的零件分別組成的自動生產線。隨著產品機型的更新換代,生產線承擔的加工對象也隨之改變,這就需要改變控制程序,使生產線的機械設備按新的工藝過程運行,而繼電接觸器控制器係統是採用固定接線,很難適應這個要求。大型自動生產線的控制係統使用的繼電器數量很多,隨著PLC的應用日益普及,其使用方法簡單,便於掌握,且可靠性,抗幹擾性很強,自身具有完善的功能.模塊化的結構,使其在工業生產線上的應用越來越廣泛。
發展趨勢:1.向高速度、大容量方向發展
為了提高PLC的處理能力,要求PLC具有的響應速度和更大的存儲容量。目前,有的PLC的掃描速度可達0.1ms/k步左右。PLC的掃描速度已成為很重要的一個性能指標。
在存儲容量方面,有的PLC可達幾十兆字節。為了擴大存儲容量,有的公司已使用了磁泡存儲器或硬盤。
2.向超大型、超小型兩個方向發展
當前中小型PLC比較多,為了適應市場的多種需要,今後PLC要向多品種方向發展,特別是向超大型和超小型兩個方向發展。現已有I/O點數達14336點的超大型PLC,其使用32位微處理器,多CPU並行工作和大容量存儲器,功能強。
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Leuze Transmission Transceiver DDLS 200/120.2-50 #52297
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Limitron 12 Amp Fuse KTK-R-12 #62400
Limitron 30 Amp Fuse KTK-30 #26711
Limitron 5 Amp Fuse KTK-5 #62268
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Lincoln Electric 15 HP AC Motor TEFC #53360
Lincoln Electric 2 HP AC Motor D-2J4824Z8 #33754
Lincoln Electric 2 HP AC Motor D-2J4827C2796 #33747
Lincoln Electric Meter L-6685 #59171
Lincoln Electric PC Board G-1566 #59228
Lincoln Electric PC Board L-6233 #59226
Lincoln Electric PC Board L6237-3 #59154
Lincoln Electric PC Board L6237-5 #59158
Lincoln Electric PC Board L-6580 #59209
Lincoln Industrial PC Board M15215-1 #59173
Lincoln Industrial Pump P30161411110 #17081
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Linde Gas Lens Nozzle 54N14 #10536
Linemaster Hercules Foot Switch 532-SWH #74496
Lintron Transformer 6341/3 #43726
Lintron Transformer ST-6341 #43725
Lithonia Lighting Light Fixture Wire Guard 3EY66 #38842
Lithonia Lighting Striplight S140 120 LPF #17083
Littelfuse 100 Amp Fuse FLNR-100 #27000
Littelfuse 110 Amp Indicator Fuse FLSR-110-ID #36149
Littelfuse 12 Amp Indicator Fuse FLSR-12-ID #36152
Littelfuse 15 Amp Fuse FLSR-15-ID #26799
Littelfuse 150 Amp Fuse FLSR-150 #36134
Littelfuse 5 Amp Fuse FLSR-5 #23493
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Logical Devices MOS EE/EPROM/MICRO Programmer PROMPRO-8X #55596
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Louis Allis Current Drive Controller MOD 7 #45771
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Lubriquip Trabon Modu-Flo Pump 521-000-020 #69191
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Lucent Technologies 1500PS2E #75535
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Lucent Technologies Power Supply RM1000HA100 #56379
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Lucifer Solenoid Valve Coil 48 1865A5 F #33903
Lucifer Solenoid Valve Coil F 484990 P33 #33904
Luckytek Circuit Board SI4T-1 #57280
Lumberg Cable RK 50-68 #61759
Lumberg Cable RKWT 4/3-632/10M #64524
Lumberg Cable RST 4-RKT 4-602/2M #44027
Lumberg Cable RST 4-RKT 4-633/1M #64526
Lumberg Connector / Component Kit RKC 50/13,5 #29026
Lumberg Cordset ASB2-RKT 4/3-695/0.3M #55471
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Lumberg Micro Distribution Block ASBSV6/LED5 #17455
Lumberg Pressure Switch RSC 50/13.5 #31581
Lumonics Drive Card E81Z2151C #32852
Lumonics Power Supply Card E81Z5561C #32864
Lumonics Power Supply Card E81Z5561C #32865
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Lutze Power Supply WRA960-24 #47958
Lyon 9 Drawer Storage Cabinet Drawer Cabinet807 #58807
Lyon Flammable Liquids Storage Cabinet 5445 45GAL #57190
Lytron Heat Exchanger 6320G3 Scratch & Dent #58827
M System Technology Inc Reverse Transmitter UDS-44-F #17729
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Mac Valve 224B-111CA #65770
Mac Valve 224B-111CAAA #70310
Mac Valve 35A-BAE-DDAJ-1KD #73846
Mac Valve 45A-FA1-DAAA-3BA #3915
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Mac Valve 82A-BC-000-TM-DDAP-1DA #58900
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Mac Valves Inc Valve 6313C-000-PM-112DA #7423
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