描述

XlN系列的直流輸入電路和內(nèi)部電路的示意圖。PLC外部的虛線框內(nèi)是NPN管集電極開路輸出的電子傳感器(如接近開關)的示意圖。圖2-4是擴展模塊FX2N―48ER―UAl／UL的交流輸入電路的示意圖。

當圖2-3中的外接觸點接通或圖中的NPN型晶體管飽和導通時，電流經(jīng)24V電源的正極(24V端子)、S／S端子、內(nèi)部電路、X0等輸入端子和外部的觸點或晶體管，從0V端子流回24V電源的負極，使光耦合器中兩個反芳聯(lián)的發(fā)光二極管中的一個亮，光敏三極管飽和導通，CPU在輸入階段讀入的是數(shù)字1；外接觸點斷開或．NPN晶體管處于截止狀態(tài)時，光耦合器中的發(fā)光二極管熄滅，光敏三極管截止，CPU在輸入階段讀入的是數(shù)字0。

當圖2-4中的外接觸點接通，或圖中的PNP型晶體管飽和導通時，電流經(jīng)24V電源的正極(24V端子)、外部的觸點或晶體管、X0等輸入端子、內(nèi)部電路和S/S端子，從0V端子流回24V電源的負極，使光耦合器中的發(fā)光二極管亮，光敏三極管飽和導通。

輸入電路中設有RC濾波電路，以防止由于輸入觸點抖動或外部干擾脈沖引起錯誤的輸入信號。濾波電路延遲時間的典型值為10～20ms(信號上升沿)和20～50ms(信號下降沿)，輸入電流約5～10mA.

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。

QTY 10 NEW GM/SATURN OEM 21000938 4cyl 1.9L AIR FILTERS

GLANCE HC RTD COMMERCIAL GLASS CLEANER 40:1 CONCENTRATE

NEW CASE OF 2 RTD BOTTLES,MAKES 32 GALLONS…CHEAP!!

NEW CASE OF 4,900 DIGI SM90 SCALE LABELS

NEW EVERPURE T7O-BW TASTE&ODOR WATER FILTER CARTRIDGE

FERRAZ PROTISTOR 700V 400A FUSE A 070 URD 32 TTI 0400C

QTY 2 NEW EMERSON RPT25A4 25PR TERMINAL BLOCKS F002685

NEW OEM 2005 FORD THUNDERBIRD CLIMATE CONTROL AC/HEATER

DATACARD DURAGARD CLEAR LAMINATE 565750-001 CP80/CP80+

QTY 36 NEW SELMER 2929 CORK GREASE CLARINET SAXAPHONE

NEW OMC STAINLESS STEEL FLANGE SA/A182F304/F30?4L B16

12 NEW CARLISLE 5 x 24 WASHABLE COTTON DUST MOP HEADS

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BRAND NEW CASE,4.25 x 3156(263′)P/N 04-00-0028-07

60 PHILIPS E10/E12 2.25V KRYPTON PEN-LIGHT BULBS/LAMPS

40 ELKHART KLEENFIT 1/2 COPPER GAS LINE ELBOW FITTING

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GENUINE LUCIDIOM 92353 YELLOW IMAGE DRUM FOR EQ-9800

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ALSTOM RED LED AIRFIELD/RUNWAY/TAXI/RR SIGNAL?LIGHTS

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CASE GOJO PRO 5000 ANTIBACTERIAL HAND SOAP REFILLS 2x5L

NEW VALCOM V-9939B MICROHONE ADAPTER UNIT

NEW COOPER WHEELOCK ET70WP WEATHERPROOF STROBE SPEAKER

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NEW HONEYWELL M6410A1029 Cartridge Globe Valve Actuator

500’INTERNAL APPLIANCE WIRE 14AWG 600V SOLID COPPER

QTY 25 ZURN QQ800X 1 FEMALE SWEAT BARB BRASS FITTINGS

NEW CASE 6 CARLISLE 2.7 QT FOOD STORAGE CROCKS W/LIDS

GERBER 41-812 CHROME TRIP LEVER BATHTUB DRAIN KIT

2006/2007 TOYOTA HIGHLANDER HYBRID ENGINE BLOCK HEATER

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CASE GOJO MICRELL ANTIBACTERIAL HAND SOAP REFILLS 4x 2L

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10 GE BIAX T/E ECO 32W 4-PIN FLUORESCENT BULBS GX24Q-3

50 NEW SOUTHCO AdvancedMC MODULE HANDLES P7-M-812-000

12 COGNITIVE BARCODE BLASTER/ADVANTAGE LX WAX RIBBONS

BRAND NEW CASE,4.23 x 3156(263′)P/N 04-00-0028-01

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10 ROLLS AIRTECH VACUUM BAGGING SEALING TAPE 1/2 x 25′

48 BEIGE CARLISLE 9oz INSULATED BOWLS DESSERT/DIP/SAL?SA

4 NEW SILITE LARGE CANOE SERVING/DECORAT?IVE BOWLS BLACK

5 NEW KIDDE 500°STANDARD RESPONSE THERMO-BULB LINKS

5 NEW KIDDE 360°STANDARD RESPONSE THERMO-BULB LINKS

12 NEW ACDELCO PF2/5575840 DURAGUARD OIL FILTERS

NEW NAPA 39571 MASTER CYLINDER CHEVY/GMC TRUCK 1983-95

25 AMERICAN EXPRESS CHECK PRESENTERS/CRED?IT CARD HOLDER

NEW 500’GENESIS 22/4 ALARM/ELECTRONI?C/SPEAKER CABLE

25 NEW RESTAURANT CHECK PRESENTERS/CREDIT CARD HOLDERS

VCS1-171-1 DC/DC CONVERTER BOARD COOPER POWER SYSTEMS

CORNING LC/PC-LC/PC FIBER OPTIC CABLE 30M DUPLEX 50/125

6 NEW CARLISLE 10LB MARBLE OCTAGONAL SERVING CROCKS

JENSEN DWR52 REMOTE W/LED SCREEN DV352 MARINE STEREO

500’NEW CCI COLEMAN 16 GAUGE COPPER FIXTURE WIRE/CABLE

NEW WHELEN SIREN MOUNT FOR 2003 CROWN VICTORIA SABKT17

28,000 GENUINE MONARCH 1136 RED PRICE GUN LABELS W/INK

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MASCOT 9940 3-STEP LEAD ACID BATTERY CHARGER 14.7V 2.3A

12 NEW COGNITIVE BLASTER ADVANTAGE RIBBONS FOR BT242003

BRAND NEW CASE,2.4 x 3156(263′)P/N 04-00-0031-02

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2 PAIRS YAKIMA Q125 AND Q126 CLIPS FOR Q TOWER SYSTEM

ORDER Q125 AND Q126 OR MIX AND MATCH

50 Zurn QQ650X 1/2 Male Sweat x 1/2 Barb BRASS FITTINGS

MAYTAG OEM 6-2095720/22204?012 WASHER STEM BOOT SEAL KIT

NEW IBM 6275529 GREEN PRINTBAND DOT MATRIX 4234 PRINTER

NEW HI-TECH SMART SYSTEMS PST5000 HOTEL THERMOSTAT

NEW KEYSCAN TX4PRX 4-BUTTON TRANSMITTER/KEY FOB KEYFOB

QTY 2)52oz CARTONS GOLD MEDAL COTTON CANDY FLOSSUGAR

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6 NEW CARLISLE 5LB MARBLE OCTAGONAL SERVING CROCKS

OEM TF950/29539579 ALLISON DIESEL TRANSMISSION FILTER

NEW ACDELCO GF851 FUEL FILTER DODGE CARAVAN++++

COMTEC INSWING LATCH KIT FOR COMMERCIAL BATHROOM DOOR

COMTEC OUTSWING LATCH KIT FOR COMMERCIAL BATHROOM DOOR