描述
1.5PLC的I/O電路
1)由于PLC是通過輸入電路接受開關(guān)量、模擬量等輸入信號，因此輸入電路的元器件質(zhì)量的好壞和連接方式直接影響著控制系統(tǒng)的可靠性。比如：按鈕、行程開關(guān)等輸入開關(guān)量的觸點接觸是否良好、接線是否牢固等。設(shè)備上的機械限位開關(guān)是比較容易產(chǎn)生故障的元件。在設(shè)計時，應盡量選用可靠性高的接近開關(guān)代替機械限位開關(guān)。此外，按鈕的常開和常閉觸點的選擇也會影響到系統(tǒng)的可靠性?，F(xiàn)以一個簡單的起動、停止控制線路為例，如圖2和圖3所示的是兩個控制線路和它們的對應梯形圖。這兩個控制線路的控制功能完全一樣，按下起動按鈕，輸出動作；按下停止按鈕，輸出斷開；但它們的可靠性不一樣。我們假設(shè)輸出斷開為安全狀態(tài)，那么圖3的可靠性要比圖2的高。這是因為SB1、SB2都有發(fā)生故障的可能，而最常見的現(xiàn)象是輸入電路開路。當采用圖3電路時，不論SB1、SB2開關(guān)本身開路還是接線開路，輸出都為安全狀態(tài)，保證了系統(tǒng)的安全和可靠。
歐美品牌停產(chǎn)的，常用的“PLC”備品備件
我司產(chǎn)品應用于以下領(lǐng)域：
1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》
2,《智能平鋼化爐系統(tǒng)制造》
3,《PLC可編程輸送控制系統(tǒng)》
4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》
6,《化工廠藥液恒流量計算機控制系統(tǒng)》
7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列
本特利，英維思，伍德沃德，?？怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂，ACSO，力士樂等各大品牌的DCS系統(tǒng)配件，機器人系統(tǒng)配件，大型伺服系統(tǒng)備件。
Omron Sysmac CPM1A-40CDR-D+CPM1A-8ER Extension Module
Pacific Scientific 5240 Indexer Drive 115VAC
YASKAWA SERVOPACK CPCR SWA6B Y12
ACROSSER INDUSTRIAL COMPUTER SYSTEM
IBM R52 R51 R50 R60 CDRW DVD Drive UJDA770 39T2667
Dell 8H352 Dazzle dv.now-AV V1.4 Video Card NEW
Mitsubishi Melsec AJ72 P25 AX41 AY51 AY13 Full PLC
National Instruments NI SB-GPIB/TNT Module
Cetia MD-RAM-34 S-RAM 3.3.6
Cyber Optics LFM25 Sensor NEW
ADVANTECH PCA-6187 A2 Single Board Computers
AL81G Digitizer 8bit 1GHz A/D High Speed scanning Board
National Instruments NI PCI-GPIB IEEE 488.2 188513B-01
NI National Instruments PCI-GPIB IEEE 488.2 183617J-01
RVSI 63552 REV-B with TTM610
SONIX SMC870 4 Axis Motion Control Driver Card
TEKNIC SST-1500-103 SERVO STEPPER DRIVE 2 units
Panasonic AC Servo MDDDT5540 1.5KW Driver
OMRON SYSMAC CS1H-CPU65H CS1HCPU65H CPU Unit
KEYENCE LK-2001 CCD LASER DISPLACEMENT CONTROLLER
FORCE SPARC CPU-5V CPU-5V/64-100-2 VME MAINFRAME CARD
NATIONAL INSTRUMENTS NI PCI-DIO-96 CARD 182920D-01
NI National Instruments PCI-GPIB IEEE 488.2 183617H-01
NI National Instruments PCI-GPIB IEEE 488.2 183617K-01
PCI-6308 REV A2 Isolated 8-Ch 12-bit Vol Output Card
Narda 4372-2 POWER DIVIDER 0.8-2.5 GHz NEW
MELLES GRIOT 59LLS393 LASER SCAN LENS
SPECIAL OPTICS LASER BEAM EXPANDER P/N 3001714
NEWPORT MM-1 OPTICAL LASER MIRROR Qty:2
SPECIAL OPTICS 56-30-2-8X LASER BEAM EXPANDER
COGNEX IN-SIGHT I/O EXPANSION MODULE
COGNEX IN-SIGHT 3400 ISS-3400 Vision controller system
Lot of 2 Gore ReadyFlex Microwave Cable Assemblie 18GHz
AGILENT 1163A Infiniium 1.5GHz PASSIVE PROBE Full Set
JSR Ultrasonics SONIX RP-H2 remote pulser
Agilent HP E3614A 0-8VDC 6A DC Power Supply
NCC KZJ 6.3V 2200UF LOW ESR Motherboard Cap QTY=200pcs
HP/Agilent N2298A 1.5m Cable Module NEW
Digi AccelePort EIA-232 30002342-03 55000536-05 REV F
OREGON MICRO SYSTEMS PC39-8 MOTION CONTROLLER
POWEREDGE 1950 670 Watt 1U REDUNDANT POWER SUPPLY A670P
HP 8493B Fixed Attenuator 3dB 6dB 20dB 30dB DC to 18GHz
IMAGING TECHNOLOGY OFG-VP1100 OFGVP1100 Frame Grabbers
Agilent HP E3614A 0-8VDC 6A DC Power Supply
ANNAPOLIS MICRO SYSTEMS Foxfire II Rev F
MICOM DIS MegaPAC Display-Clock-M?em 100-3224-001A
GE Fanuc 90-30 PLC CPU323P IC693CPU323P 10 SLOT SYSTEM
GE Fanuc 90-30 PLC CPU351 IC693CPU351-FN 10 SLOT SYSTEM
ADTECH SPIRENT 401311 GENERATOR+400302A DS3 Interface
Comtrol 5002200 Rocketport Plus uPCI Quad/Octa
Dell Qlogic QLA200 2Gbps PCI-x Fibre Channel HBA
Spirent Adtech AX/4000 Ethernet Control Module 401427
Force SYS68K CPU-33B/4 VME Board
MODCOMP CPU VLAN-E PCB 25142 REV A2
MODCOMP CPU PCB 01-W3623B-03B 01 W3623B 03B
ADEPT TECH 10332-00655 ENHANCED VME VISION INTERFACE
ADLINK PCI-8124 4-CH High-speed Triggering Board
AUTOMATE MULTI E/A VME GRUNDKARTE D-2100
ANIMATICS Motion Controler RTC3000 with DEMEX
OMRON E5AK-AA2-500 DIGITAL CONTROLLER
DELL ND674 4GB/S PCI-E HOST BUS ADAPTER HBA NEW
YASKAWA SERVOPACK SGDE-04AP 400WATT SERVO DRIVE
Agilent 87222C Coaxial Transfer Switch DC to 26.5 GHz
JSR Ultrasonics DPR500 Dual Channel Pulser/Receiver
Agilent 87222D Coaxial Transfer Switch DC to 40 GHz NEW
Asymtek Multi-Axis Controller A-201D
Beckhoff BK3110 Profibus Koppler 24V BK 3110 2X KL1104
Omron ES100P AAHFE DIGITAL CONTROLLER Meters
Omron F300S2R F300-S2R SHUTTER CAMERA
CyberOptics 6604044 Laser Module
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Agilent A8495B Manual Step Attenuator 18GHz 0-70dB
Agilent E6392-60001 Universal DC Power Adaptor NEW
Finisar FTRJ8519P1BNL 2GB SFP Transceiver GBIC X12pcs
OMRON 3G8C2-CK000 3G8C2CK000 CARD
Agilent N2772A 20 MHz Differential Probe
RVSI 53128 P/N 49335-1
METCAL SSC 626A SSC-626A SOLDER TIPS Lot of 8
OMRON C200HE CPU42 NC113,OC225,ID212 PLC
Agilent N2780A 2 MHz 500A AC/DC Current Probe
RVSI 375501 Anorad VPC-2000A&VPC-2000B
KEYENCE KV-U4 AC POWER SUPPLY FOR KV-300 PLC
Olympus WHSZ15X-H 16 5 TO-5 Adjustable eye piece
Agilent 3458A Digital Multimeter 8.5 Digits
KOLLMORGEN SERVOSTAR 400-M 443M-S SERVO AMPLIFIER
SCION LG-3 Frame Grabber REV C ACUITY IMAGING PCI
GSI lumonics 6056049 P/N:6056049 Board
National Instruments NI PCI-DIO CARD 185183C-01 PCI
PCL-728 Isolated 2-channel D/A Output Card
RVSI Video Capture card 070-200000 Rev B
RVSI Video Capture card 070-200200 Rev C
Imaging Technology Incorporated IC-PCI Frame Grabber
Omron G3B-205S Solid state relay Qty:2
BECKHOFF BK5120 KL1418 KL2408 KL1114 KL2134 KL3202 BUS
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