IC646PCM005，IC646PCM005，IC646PCM005
可編程控制器的組成介紹（以FX2N系列PLC為例）
外部的開關(guān)信號、模擬信號以及各種傳感器檢測信號作為PLC的輸入變量，它們經(jīng)PLC的輸入端子進(jìn)入PLC的輸入存儲器，收集和暫存被控對象實(shí)際運(yùn)行的狀態(tài)信息和數(shù)據(jù)；經(jīng)PLC內(nèi)部運(yùn)算與處理后，按被控對象實(shí)際動作要求產(chǎn)生輸出結(jié)果；輸出結(jié)果送到輸出端子作為輸出變量，驅(qū)動執(zhí)行機(jī)構(gòu)。PLC的各部分協(xié)調(diào)一致地實(shí)現(xiàn)對現(xiàn)場設(shè)備的控制。
（1）中央處理器CPU
CPU的主要作用是解釋并執(zhí)行用戶及系統(tǒng)程序，通過運(yùn)行用戶及系統(tǒng)程序完成所有控制、處理、通信以及所賦予的其它功能，控制整個(gè)系統(tǒng)協(xié)調(diào)一致地工作。常用的CPU主要有通用微處理器、單片機(jī)和雙極型位片機(jī)。
（2）存儲器模塊
隨機(jī)存取存儲器RAM用于存儲PLC內(nèi)部的輸入、輸出信息，并存儲內(nèi)部繼電器（軟繼電器）、移位寄存器、數(shù)據(jù)寄存器、定時(shí)器／計(jì)數(shù)器以及累加器等的工作狀態(tài)，還可存儲用戶正在調(diào)試和修改的程序以及各種暫存的數(shù)據(jù)、中間變量等。
只讀存儲器ROM用于存儲系統(tǒng)程序。可擦除可編程序的只讀存儲器EPROM主要用來存放PLC的操作系統(tǒng)和監(jiān)控程序，如果用戶程序已完全調(diào)試好，也可將程序固化在EPROM中。
ALLEN-BRADLEY 872C-A10N30-R3 N.O. SN:10mm 20-250VAC PROXIMITY SWITCH
ALLEN-BRADLEY 871TM-DH5NP18-N4 DC PROXIMITY SENSOR 5MM SN PNP - ! QUANTITY!
Allen-Bradley 871TM-DH5NP18-H2 Series A Proximity Sensor
ALLEN-BRADLEY 871TM-DH2NP12-D4 SER.A QUANTITY! N.O. 2mm 10-30VDC PROX. SENSOR
ALLEN-BRADLEY 871TM-DH2NP12-C2 SER.A 10-30VDC PROXIMITY SENSOR
ALLEN-BRADLEY 871TM-B2N12-C2 SER.A ! N.O. SD: 2mm INDUCTIVE PROXIMITY SENSOR
ALLEN-BRADLEY 8-594 PHOTOELECTRIC EM-RELAY SER.B
ALLEN-BRADLEY 8-593 PHOTOELECTRIC EM-RELAY QUANTITY!!!
ALLEN-BRADLEY 8-590 PHOTOELECTRIC EM-RELAY SER.B QUANTITY!!!
Allen-Bradley 8-590 Output Module 2A @ 120V 1A @ 240V ! WOW !
Allen-Bradley 855T-BSBC Series B Accessory Kit
ALLEN-BRADLEY 855T-B24SA1 SER.C QUANTITY 24V SINGLE TONE SOUND BLACK HORN BUZZER
ALLEN-BRADLEY 855E-LL24R SER A 24V RED, in box
ALLEN-BRADLEY 855E-LL24G SER.A QUANTITY! 24V GREEN LED LAMP/BULB FOR STACK LIGHT
ALLEN-BRADLEY 855E-LL24G SER A 24V GREEN, in box
ALLEN-BRADLEY 855E-LL24A SER A 24V AMBER, in box
Allen-Bradley 855E-GPM25 Series A Signal Tower Light Base(Color White)
ALLEN-BRADLEY 855E-G24SA3 SER.A ! QUANTITY! 24V SINGLE TONE GREY HORN BUZZER
ALLEN-BRADLEY 855E-24DN4 ! QUANTITY SER.A RED STEADY INCANDESCENT STACK LIGHT
ALLEN-BRADLEY 852S-NSB SERIES G SOLID STATE TIMER 110V-120V 50HZ-60HZ TESTED!!
ALLEN-BRADLEY 845H-SJHC24DNY2C SER.B ! ENCODER OPTICAL INCREMENTAL
ALLEN-BRADLEY 845H-SJDZ23DBY1C SERIES C ENCODER IN BOX!!
ALLEN-BRADLEY 845H-SJDZ23CBY1C ENCODER, INCREMENTAL 8-24V - !
ALLEN-BRADLEY 845H-SJDZ13EBY1C SER.B ! ENCODER OPTICAL INCREMENTAL
ALLEN-BRADLEY 845H-SJDN12FWY2C SER.B ! ENCODER OPTICAL INCREMENTAL
ALLEN-BRADLEY 845D-SJHZ25BDCK1 SER.A ! ENCODER OPTICAL ABSOLUTE
ALLEN-BRADLEY 845D-SJHZ24AGFW4 SER.A ! QUANTITY! ENCODER OPTICAL ABSOLUTE
ALLEN-BRADLEY 837-A61 BULLETIN 837 TEMPERATURE SWITCH
ALLEN-BRADLEY 836T-T250JX9 VACUUM PRESSURE CONTROL QUANTITY!!!
Allen-Bradley 825-PDN Series A DeviceNet Communications Card
ALLEN-BRADLEY 825-MCM630 OVERLOAD Ie= 160...630A 1000V 50/60Hz SER.A QUANTITY!!!
Allen-Bradley 817U Thermistor
ALLEN-BRADLEY 817-M* THERMISTOR PROTECTION RELAY SER. A 110V 2VA
ALLEN-BRADLEY 817-AD SER.A QUANTITY! 110V THERMISTOR PROTECTION RELAY
ALLEN-BRADLEY 813S-VOC SER.B LINE VOLTAGE MONITOR RELAY ! !
ALLEN-BRADLEY 809-A03E ! INSTANTANEOUS TRIP CURRENT RELAY 1.9 - 6.1A
ALLEN-BRADLEY 802T-W1 Roller Lever .75DX9/32WD WOW
ALLEN-BRADLEY 802PR-LBAJ1 /E INDUCTIVE PROXIMITY SENSOR 20-250V AC/DC 25mA
ALLEN-BRADLEY 802PR-LBAB1 PROXIMITY SENSOR 20-250VAC/DC AC 4-25mA DC 2-25mA N.O.
ALLEN-BRADLEY 802C-E53M6B PULL SAFETY SWITCH BUL. 802C SERIES: A REV: A
ALLEN-BRADLEY 800T-XD6 SER.D !! QUANTITY!! 1NC CONTACT BLOCK
ALLEN-BRADLEY 800T-XD2 SER.D ! QUANTITY! 1N.C. CONTACT BLOCK
ALLEN-BRADLEY 800T-XD1P SER.F ! 1N.O. SEALED SWITCH CONTACT BLOCK
ALLEN-BRADLEY 800T-XD1 ! QUANTITY! SER.D 1NO CONTACT BLOCK
ALLEN-BRADLEY 800T-XD1 IN BOX CONTACT BLOCK (2F0)
ALLEN-BRADLEY 800T-XAR SER.A ! 1N.O./1N.C. CONTACT BLOCK LOGIC REED BLOCK QTY
ALLEN-BRADLEY 800T-T3P1GALX 3-POS JOY STICK 600V 10A - ! QUANTITY!
ALLEN-BRADLEY 800T-T2H1 2 WAY MAINTAINED TOGGLE JOYSTICK
ALLEN-BRADLEY 800T-P16 *NIB* PILOT LIGHT TYPE 4/13 SER T 120V (2F0)
ALLEN-BRADLEY 800T-NG11KF4C 4-POS SELECTOR SWITCH - !
Allen-Bradley 800T-J91 Selector Switch
Allen-Bradley 800T-H5A Series T 2 Position Spring Return Selector Switch
ALLEN-BRADLEY 800T-H48B SELECTOR SWITCH LOCKING - !
ALLEN-BRADLEY 800T-A SER. T BLACK PUSH BUTTON OPERATOR SWITCH - NNP - FREE SHIP
ALLEN-BRADLEY 800T-16HG2KB6 GREEN SELECTOR SWITCH
ALLEN-BRADLEY 800MS-JX2R SELECTOR SWITCH UNIT SER.A !!
ALLEN-BRADLEY 800L-18L24 INDICATOR LIGHT RED
ALLEN-BRADLEY 800H-QRTH24G PUSH TO TEST GREEN 24V - QUANTITY!
ALLEN-BRADLEY 800H-PRBH16R PUSH TO TEST RED 120V - QUANTITY!
ALLEN-BRADLEY 800H-PRBH16G ILLUMINATED PUSHBUTTON GREEN 120V
ALLEN-BRADLEY 800H-PR16 PILOT LIGHT RED 120V - QUANTITY!
Allen-Bradley 800H-NP11 Series A 1" Conduit Plug 800HNP11
ALLEN-BRADLEY 800H-JP42KB7 KEY OPERATED SELECTER SWITCH 3 POS - ! QUANTITY!
ALLEN-BRADLEY 800FM-KM34MX22 KEY MAINTAINED SELECTOR SWITCH - ! QUANTITY!
ALLEN-BRADLEY 800FM-KM21 2 POSTITON KEY MAINTAINED SELECTOR SWITCH SER: A !!
ALLEN-BRADLEY 800E-3DB5 ! QUANTITY! 120V SER.A BASE MOUNT MODULE
ALLEN-BRADLEY 77135-146-52 ! QUANTITY! 2711 MEMORY CARD RETAINER KIT
ALLEN-BRADLEY 74101-915-16 1336-GM1 REMOTE I/O BORD
ALLEN-BRADLEY 71A86 * * OPERATING COIL SIZE 1 110-120V (2F0)
ALLEN-BRADLEY 709-DOD SER.CC SIZE 3 120V COIL 3PH 600V 50HP STARTER
ALLEN-BRADLEY 709-AOD103 SER.K 460-575V 5HP SIZE 0 120V COIL STARTER
ALLEN-BRADLEY 700-ZBR520AZ1 SAFETY RELAY 120V 24V SER.A
Allen-Bradley 700-TBR60 Series A Terminal Block Relay 700TBR60
ALLEN-BRADLEY 700-TBR60 60VDC COIL 6A 250VAC RELAY W/ 700-HLT1L160 BASE QUANTITY
Allen-Bradley 700-TBR24 Series A Terminal Block Relay 700TBR24
ALLEN-BRADLEY 700-TBR24 24VDC COIL 6A 250VAC RELAY W/ 700-HLT1Z24 BASE QUANTITY!
ALLEN-BRADLEY 700S-P310A1 SAFETY RELAY 3NO/1NC 120V
Allen-Bradley 700-SE10GZZ24 Series A Solid State Relay 700SE10GZZ24
ALLEN-BRADLEY 700S-DCP620Z24 8 POLE 6 N.O. 2 N.C. 24VDC SAFETY CONTROL RELAY
ALLEN-BRADLEY 700S-CF620ZJC SAFETY CONTROL RELAY
ALLEN-BRADLEY 700S-CF440ZJC SER.A QUANTITY! 1N/O 3N/C 24VDC COIL SAFETY RELAY
ALLEN-BRADLEY 700S-CF440DJC SER.A 24VDC COIL SAFETY RELAY * QUANTITY!!!
