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PLC可編程控制器的特點
1）、可靠性高，抗*力強。工業生產一般對控制設備的可靠性要求很高，并且要有很強的抗*力。PLC能在惡劣的環境中可靠的工作，平均*時間達到數萬小時以上，已被*為zui可靠的工業控制設備之一。
PLC本身具有較強的自診斷功能，保證硬件核心設備（CPU、存儲器、I/O總線等）在正常情況下執行用戶程序，一旦出現故障則立即給出出錯信號，停止用戶程序的執行，切斷所有輸出信號，等待修復。PLC的主要模塊均采用大規模和超大規模集成電路，I/O系統設計有完善的通道保護與信號調理電路。在結構上對耐熱、防潮、防塵、抗震等都有精確的考慮，在硬件上采用隔離，屏蔽、濾波、接地等抗干擾措施，在軟件上采用數字濾波等措施。與繼電器系統和通用計算機相比，PLC更能適應工業現場環境要求。
2） 硬件配套齊全，使用方便，適應性強
PLC是通過執行程序實現控制的。當控制要求發生改變時，只要修改程序即可，zui大限度地縮短了工藝更新所需要的時間。PLC的產品已標準化、系列化、模塊化，而且PLC及配套產品的模塊品種多，用戶可以靈活方便地進行系統配置組合成各種不同規模、不同功能的控制系統。在PLC控制系統中，只需在PLC的端子上接入相應的輸入/輸出信號線即可，不需要進行大量且復雜的硬接線，并且PLC有較強的帶負載能力，可以直接驅動一般的電磁閥和交流接觸器。
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鄭娟萍
廈門仲鑫航自動化設備有限公司
3）、編程直觀、易學易會
PLC提供了多種編程語言，其中梯形圖使用zui普遍。PLC是面向用戶的設備，PLC的設計者充分考慮到現場工程技術人員的技能和習慣，因此PLC程序的編制采用梯形圖的簡單指令形式。梯形圖與繼電原理圖相似，這種編程語言形象直觀，易學易懂，不需要專門的計算機知識和語言，現場工程技術人員可在短時間內學會使用。用戶在購買PLC后，只需按說明書的提示，做少量的接線和進行簡易的用戶程序編制工作，就可靈活方便地將PLC應用于生產實踐。
RELIANCE 601739-Y 45F RELAY INPUT ASSEMBLY ***NIB***
J.LECHNER & SOHN HDK VALVE GAUGE (20-0-20) ***NNB***
NUMATICS 12DSA407KA 2-WAY VALVE ***XLNT***
NUMATICS 12DSA407KA00030 2-WAY VALVE ***XLNT***
FEDERAL MOGUL/NATIONAL OIL SEALS 450241 (LOT OF 2) ***NIB***
ITT SPACER SLEEVE 52-105-350-001 01-309-3690 ***NIB***
ITT PUMP COLLAR AND ACTION 52-118-510-801 PS-1018 ***NIB***
FUJI AH30-F COMMAND SWITCH (LOT OF 9) ***NIB***
ARROW 1681 PNEUMATICS GAUGE 1/8IN RANGE 1-160PSI ***NIB***
PARKER D31VW1D47570YF PILOT VALVE/VALVE ***XLNT***
MICROSWITCH WZ-2RQ69-1PA4/WZ2RQ691PA4 SWITCH KIT ***XLNT***
FEDERAL MOGUL/NATIONAL OIL SEALS 415011 ***NIB***
MOOG 631-195C HYDRAULIC VALVE ***XLNT***
RELIANCE 3141-RK/NATIONAL CARBON RE41RK BRUSHES (BOX OF 8) ***NIB***
SIEMENS 6DD1-641-0AC0/6DD16-41-0AC0/6DD1641-0AC0/6DD16410AC0 PC BOARD ***XLNT***
JUMO AM020W-245/50 TRANSMITTER 0-20MA 5.6VA ***XLNT***
ASCO 302735 RED HAT VALVE REBUILD KIT ***NIB***
ASCO 064-982-5-D RED-HAT VALVES SOLENOID COIL ***NIB***
ASCO EF8300B404F SOLENOID VALVE 120VAC 20W ***XLNT***
ASCO 8316D25 SOLENOID VALVE 16.7W ***XLNT***
ASCO 302015 RED-HAT VALVE REBUILD KIT ***NIB***
ASCO 099-019 099019 SOLENOID VALVE REPAIR KIT ***NIB***
ASCO 218-941 218941 RED HAT VALVE ***NIB***
SIEMENS 3VE4-200-1CQ00/3VE42-00-1CQ00/3VE4200-1CQ00/3VE42001CQ00 BREAKER *XLNT*
ASCO EF8300A81RG SOLENOID VALVE ***XLNT***
ASCO EF8316G46/314496/EF8003G2 SOLENOID VALVE ***XLNT***
JOSLYN CLARK 211L4 COIL ***NNB***
RELIANCE 410403-79AW HIGH POWER SCR ***NIB***
RELIANCE K-301 CONTACT KIT ***NIB***
RELIANCE 76628-AX COIL 230VDC ***NIB***
SMC CDQ2B16-5DM CYLINDER 145PSI ***NNB***
RELIANCE 0-51486-53/0514860-53/051486053/O-51486-53 RELAY BOARD ***XLNT***
RELIANCE 410403-78AW DIODE ****NIB****
GATES 7838-0010 BUSHING JA X 5/8 ***NIB***
PARKER 4520AF20ABBB53 2-WAY VALVE 40-150PSIG ***XLNT***
NUMATICS 34DSA43AK/33DSA400K 2-WAY VALVE ***XLNT***
EATON/CUTLER HAMMER MPC1M11 INPUT MODULE ***XLNT***
ALLEN BRADLEY 700DC-P200Z24 RELAY ***XLNT***
ENTRELEC 000700120/0007-001-20 TERMINAL BLOCK (BOX OF 10) ***NIB***
NUMATICS 12DSA407KA00030 2-WAY VALVE ***NNB***
NUMATICS 33DSA7 K/33DSA700K 2-WAY VALVE ***NNB***
MARTIN 18L0501A TIMING PULLEY ***NIB***
VICKERS DG5S-8-2C-MWB-20/DG5S82CMWB20 VALVE ***XLNT***
WARD LEONARD 193L1 COIL 110V (LOT OF 2) ***NIB***
SQUARE D JCK-1F300V20 TIMING RELAY 120VAC/110VDC *NIB*
NUMATICS 35SAD415K/33SAD400K 0.36A VALVE ***XLNT***
GO SWITCH 77-13522-F2 CONTACT SWITCH ***NIB***
RATHGEBER ET-500-CNA/ET500CNA TRANSFORMER ***XLNT***
RATHGEBER ET-320-CNA/ET320CNA TRANSFORMER ***XLNT***
221L2 CCC BRAKE COIL 230VDC ***NNB***
SIEMENS 25-105-112-502 STARTER COIL 115V ***XLNT***
KEYENCE BL-600 LASER SCANNER 5VDC ***NNB***
SERVAN SVDH3-P*HMB SERVO-LAND MOVO CONTROL ***XLNT***
SERVAN SVDH3-P*HMB*16I16O/161160 SERVO-LAND MOVO ***XLNT***
PARKER CPOM3 PILOT CHECK VALVE ***XLNT***
SERVAN SVDH3-P*8I8O/8I80/8180 SERVO-LAND MOVO ***XLNT***
SERVAN SVDH1-P*HMB SERVO-LAND MOVO ***XLNT***
HEINEN 60864/GSM-WA DIGITAL COUNTER ***XLNT***
SERVAN SVDH1-P*8I8O/8I80/8180 SERVO-LAND MOVO ***XLNT***
PSI 924-01002-5793 ENCODER ***XLNT***
NATIONAL CARBON RE41GS CARBON BRUSH ***NNB***
RELIANCE 41NU CARBON BRUSH (LOT OF 3) ***NNB***
RELIANCE RE41PH H8 CARBON BRUSH ***NNB***
RELIANCE 800892-R FCCE ASSEMBLY ***XLNT***
SAIA PC PCA1-A30 PC BOARD PLC ***NNB***
RELIANCE 3141-RK/NATIONAL CARBON RE41RK BRUSH ***NNB***
PHILIPS PE 1411/15 LINE REACTOR/POWER CONDITIONER 200VA OUT ***XLNT***
GOULD SHAWMUT A50P70 FUSES 70A 500V (LOT OF 3) ***XLNT***
PRECISION INSTRUMENT H25F-SS-1024-5880 ENCODER ***XLNT***
GOULD SHAWMUT A50P70 FUSES 70A 500V (LOT OF 5) ***XLNT***
EUROTHERM 2404/CG/VH/LH... TEMPERATURE CONTROLLER ***NIB***
RELIANCE 06DH CARBON BRUSH (LOT OF 2) ***NNB***
RELIANCE 41PN CARBON BRUSH (LOT OF 5) ***NNB***
GE 9T51B82 TRANSFORMER 60HZ 1PH ***XLNT***
JOSLYN CLARK D713UPG-76 PNEUMATIC TIMING RELAY ***NIB***
LAMB-GRAYS HARBOR 346392 CYLINDER 3000PSI ***XLNT***
JOSLYN CLARK 713UPG-46 PNEUMATIC TIMING RELAY ***NIB***
RELIANCE RELE-66 CARBON BRUSH ***NNB***
CUTLER HAMMER 1370AF2501 PHOTOELECTRIC DIFFUSE ***NIB***
STEARNS 1055521Z0BFF/1055-521-Z0-BFF BRAKE ***XLNT***
MICRO-LINK/SEA-ILAN 97134 REV 3 PC BOARD ***NIB***
PFAUTER-MAAG FGS-6354/ID-41130-009-5-00 GEAR CUTTER ***NNB***
GLEASON FGS-6291/ID-44217-009-9-01 GEAR CUTTER ***NNB***
ALLEN BRADLEY 1784-T35 OPERATOR INTERFACE ***RFB***
GLEASON GH-6561/ID-37092-009-8-02 GEAR HOB ***NNB***
RELIANCE 41NU BRUSHES (LOT OF 6) ***NNB***
RELIANCE RE41PR CARBON MOTOR BRUSH ***NNB***
RELIANCE 086466060V/86466-60V RECTIFIER STACK ***NIB***
PARKER HHB2087501D PNEUMATIC VALVE ***NNB***
STEARNS 105503201027/1-055-032-01-027 BRAKE ***NIB***
