1771-ASB價格杠杠的1771-ASB價格杠杠的
PLC可編程控制器的分類
1）按I/O點數(shù)分類
PLC所能接受的輸入信號個數(shù)和輸出信號個數(shù)分別稱為PLC的輸入點數(shù)和 輸出點數(shù)。其輸入、輸出點數(shù)的數(shù)目之和稱為PLC的輸入/輸出點數(shù)，簡稱I/O點數(shù)。I/O點數(shù)是選擇PLC的重要依據(jù)之一。
一般而言，PLC控制系統(tǒng)處理的I/O點數(shù)較多時，則控制關(guān)系比較復(fù)雜，用戶要求的程序存儲器容量也較大，要求PLC指令及其他功能比較多。按PLC輸入、輸出點數(shù)的多少可將PLC分為以下三類。
（1）小型機
小型PLC輸入、輸出總點數(shù)一般在256點以下，用戶程序存儲器容量在4K字左右。小型PLC的功能一般以開關(guān)量控制為主，適合單機控制和小型控制系統(tǒng)。
（2）中型機
中型PLC的輸入、輸出總點數(shù)在256~2048點之間，用戶程序存儲器容量達到8K字左右。中型機適用于組成多機系統(tǒng)和大型控制系統(tǒng)。
手機
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鄭娟萍
廈門仲鑫航自動化設(shè)備有限公司
(3) 大型機
大型PLC的輸入、輸出總點數(shù)載2084點以上，用戶程序存儲器容量達到16K字以上。大型機適用于組成分布式控制系統(tǒng)和整個工廠的集散控制網(wǎng)絡(luò)。
上述劃分沒有一個十分嚴格的界限，隨著PLC技術(shù)的飛速發(fā)展，一些小型PLC也具備中型或大型PLC的功能，這也是PLC的發(fā)展趨勢。
2）按結(jié)構(gòu)形式分類
按照PLC的結(jié)構(gòu)特點可分為整體式、模塊式兩大類。
（1）整體式結(jié)構(gòu)
把PLC的CPU、存儲器、輸入/輸出單元、電源等集成在一個基本單元中，其結(jié)構(gòu)經(jīng)湊，體積小，成本低，安裝方便。基本單元上設(shè)有擴展端口，通過電纜與擴展單元相連，可配接特殊功能模塊。微型和小型PLC一般為整體式結(jié)構(gòu)，S7-200系列屬整體式結(jié)構(gòu)。
（2）模塊式結(jié)構(gòu)
模塊式結(jié)構(gòu)的PLC由一些模塊單元構(gòu)成，這些標準模塊包括CPU模塊、輸入模塊、輸出模塊、電源模塊和各種特殊功能模塊等，使用時將這些模塊插在標準機架內(nèi)即可。各模塊功能是獨立的，外形尺寸是統(tǒng)一的。模塊式PLC的硬件組態(tài)方便靈活，裝配和維修方便，易于擴展。
目前，中、大型PLC多采用模塊式結(jié)構(gòu)形式，如西門子的S7-300和S7-400系列。
NORA SK03/1039-10/63988-905B REV F 3 PHASE TRANSFORMER ***XLNT***
TRANSFORMATIK M701243-80/040-3/050-5 REV. D 3 PHASE TRANSFORMER ***XLNT***
THOMSON MICRON NT42-010/64-116836-A711 NEMA TRUE PLANETARY 10:1RATIO ***NNB***
ALLEN BRADLEY 20A D 027 C 3 AYNANNN/20AD027C3AYNANNN/A POWERFLEX70 20HP *XLNT*
SIEMENS BERO 3 RG 4638-3AN01/ 3RG46383AG01 INDUCTIVE PROXIMITY SWITCH **XLNT**
EMECANIQUE D10S3 MOTOR CONTROL SWITCH 100AMP 3POLE ***NIB***
ENTRELEC VY 125/D/013 ROTARY SWITCH KIT ****NIB****
CUTLER HAMMER E51PLS1/E51SPL/E51DS1 PROXIMITY SENSOR SW ***NIB***
WESTINGHOUSE TRN 1P ELECTRONIC TIMER 24VAC/DC 10A **NIB**
EMECANIQUE LR-D09 310/LR-D09310 OVERLOAD RELAY *NIB*
KAMLOK MS-27023-17 4" ALUMINUM QUICK HOSE DISCONNECT CAMLOCK TTMA FLANGE*NNB
IDEC GT3F-2E A100 250VAC 50/60HZ 30VDC ELECTRONIC TIMER ****NIB****
VICKERS ASD68-S319-G24/HB6 VALVE WITH 2 SOLENOIDS 350BAR ***NIB***
WANDFLUH AS4D108-S319 SOLENOID VALVE ***NIB***
AMPHENOL 9351/MS3108B16-9S CIRCULAR SIZE 16 CONNECTOR ***NIB***
FAN-S 09325-F/30 5C022 3.25" X 3.25" FAN FILTER (LOT OF 13) ***NIB***
BOSCH 0 811 402 118/0811-402-118 SOLENOID VALVE ***NNB***
VICKERS 02-126196 DG4S4 010C U H 60 DIRECTIONAL VALVE ***NNB***
SONY BHF-1600A DIGITAL MASTER RECORDER ***XLNT***
ALLEN BRADLEY 1770-KCA KEYBOARD ASSEMBLY ***XLNT***
NUMATICS 33DFR4430 PNEUMATIC 5-WAY VALVE 150PSI 3/8NPT ***NIB***
DUFF NORTON 274812D003/SK-2555-1 LINEAR ACTUATOR ***XLNT***
STEARNS/REXNORD 108703100EQF HORIZONTAL BRAKE ASSEMBLY ***NIB***
VICTOR SPECIALTIES 10744-S 3/4" THIN WALL SCREW IN HOOKS (LOT OF 82) ***NIB***
ONO SOKKI AF-550 WAVEFORM ANALYZER ***XLNT***
FUJI SMB175N-120/9D116 75A 1200V IGTB SNUBBER ***XLNT***
CANTEX E940F/6141625 1" PVC COUPLINGS (BOX OF 66) ***NIB***
SEMIKRON SKKH 27/16 E 25A THYRISTOR MODULE (LOT OF 3) ***XLNT***
ABB/PHOENIX CONTACT PP10012HS/(ABBN)5A TERMINAL BLOCK (MISSING 1 PIN) ***XLNT***
ABB/PHOENIX CONTACT PP10012HS/(ABBN)5A TERMINAL BLOCK ***XLNT***
DANOTHERM R6613210401/GRF30/100A RESISTOR ***XLNT***
FURNAS 45EG20AJ 24V CONTACTOR (LOT OF 2) ***XLNT***
ABB ES300-9643 CURRENT TRANSDUCER ***XLNT***
ORBINOX CF8M/316 CLASS 150 ET 6" KNIFE GATE ****XLNT****
ITC/INDUSTRIAL TIMER COMPANY TD-15S SECOND TIMER 5W 220V ***XLNT***
ABB 57619775B/58939480A/NVAR-55 VARISTOR BOARD ***XLNT***
CLINTEK 99400804/50033629 200 PLUS CPU BOARD W/ MIU 32 PIN CARD 6021 ***XLNT***
ABB 3BSC980004R617/3BSE015488R1/NAMC-11 PC BOARD ***XLNT***
ABB 3BSC980004R619/3BSE017193R1/NDCO-03 COMMUNICATION OPTION BOARD ***XLNT***
ABB 57619091D/58908185F/NGDR-02 PC BOARD ***XLNT***
ABB 58907987J/NINT-52 INTERFACE BOARD MAIN CIRCUIT ***XLNT***
ITC/INDUSTRIAL TIMER COMPANY CTD-1M 1MIN TIMER 15W 115V ***XLNT***
ITC/INDUSTRIAL TIMER COMPANY CTD-5M 5 MIN TIMER 1/4HP 10AMP 230VAC ***XLNT***
GE THED113020 20A CIRCUIT BREAKER (LOT OF 4) ***XLNT***
ATC 305C008A10PX/305C-008-A-10PX SECONDS TIMER 120V 60HZ 120SECONDS ***XLNT***
WESTINGHOUSE NLPL-789 MINI LOADER/PROGRAMMER (KEY LODGED) ***XLNT***
IDEC RTE-BN1 120VAC 50/60HZ ELECTRONIC TIMER ****XLNT****
WARD LEONARD WL-320-L1/WL320L1 COIL 110/120V ***NNB***
WER FOCUS II FOLLOWER OPTION KIT 2450-9012/SC-1233 CONTROL BOARD ***XLNT***
VACON VC-540-210-1 COIL VOLTAGE INDICATOR FREQUENCY CONVERTER ***XLNT***
ALLEN BRADLEY 2112B-BDB-6P-24R-41 STARTER W/ DISCONNECT BUCKET ***XLNT***
APW/MCLEAN HE-3316-101H ENCLOSURE HEAT EXCHANGER 115V 50/60HZ 1 PHASE*XLNT*
SQUARE D HACR-AD-7110 CIRCUIT BREAKER 3P 10KA ***XLNT***
5 1/4" - 5 3/8" HEX HEAD BOXEND WRENCH 42" LONG ***XLNT***
COOPER DGD A1-R/A1R/960254 CONTROLLER/OPERATOR INTERFACE ***XLNT***
HUBBELL RACO 775 MUD RING 4" x 4" RAISED 1-1/4" (LOT OF 25) ***NIB***
MARATHON 1423574 3 TERMINAL BLOCK ***XLNT***
FERRAZ SHAWMUT 67653 3 POLE LUG CONNECTOR (NO FACE) ***XLNT***
GE 9T58K0042 TRANSFORMER ***XLNT***
PEPPERL+FUCHS NCN20+U4+N0/NCN20U4N0 5 WAY POSITIONING SENSOR 5-25VDC ****NNB****
CROUSE-HINDS TP434 4" SQUARE ELECTRICAL OUTLET BOX 2-1/8" DEEP (BOX OF 25) *NIB*
HUBBELL RACO 911-2 RED ALERT BACK BOXES FOR MOUNTING 3 1/2 DEEP ***NNB***
BUSSMANN FNQ-R-30 30A 600V FUSE (LOT OF 3) ***XLNT***
PROMINENT VARIO VAMA12042PP1000A110 METERING/DOSING PUMP 8.3 GPH 145 ***XLNT***
BAY NETWORKS AL2012A01/P116550-ARJ BAYSTACK 350T AUTOSENSE SWITCH ****NIB****
SEMIKRON SKKH162/1E THYRISTOR MODULE ***XLNT***
ALLEN BRADLEY 1450387/1450387-05 CIRCUIT CARD ***XLNT***
OMEGA/JENWAY PHB-70X WATER ANALYZER ***XLNT***
BLACK BOX MX512A-ST/724-746-5500 FIBER OPTIC ASYNC MULTIPLEXOR ****XLNT****
SICK MSLS03-24071 LIGHT GUARD TRANSMITTER SENDER ***XLNT***
SICK MSLE03-S15 LIGHT GUARD TRANSMITTER SENDER W/ CONNECTOR INPUTS ***XLNT***
EXPRESS TRANSFORMERS QGA 603-67B ISS 3 81755 250VA TRANSFORMER ***XLNT***
SICK MSLE03-24051A LIGHT GUARD TRANSMITTER SENDER ***XLNT***
IVY 5119-00-02 REV 02 BIOMEDICAL SYSTEMS MOTHERBOARD FOR EKG MACHINE ***XLNT***
HP SXP300 DVM PCB ISS.6 QGA603-20-PL PRINTED CIRCUIT BOARD ***XLNT***
TOA TT-104 PROGRAM TIMER ****XLNT****
ALLEN BRADLEY 2755-DD4A SERIES B REV B BAR CODE DECODER ***XLNT***
HOTRONIC TBC/AE61-CB TIME BASE CORRECTOR **XLNT**HOTRONIC TBC/AE61-CB TIME BASE
GENERIC CM1 MBP1/44932-01 CABLE ***XLNT***
ONTRAK 497-0434976 MODEL ADU497A ***XLNT***
GENERIC QGA603-151D PCB ***XLNT***
CHEMRAD NAVTRAC GPS ROVER MODEL 2200 **XLNT**
GENERIC QGA603-181D PCB ***XLNT***
RCK PF-41A1R-M TEMPREATURE CONTROLLER ***NIB***
TEXAS MICROSYSTEMS 868-F-19585 REV. C MOTHERBOARD ***XLNT***
DYNAPAR HS351024G3331 INCREMENTAL ENCODER 1" BORE BI-DIR 5-26V 7P ***NIB***
TEXAS INSTRUMENTS 8032L REV. C SIMM DRAM EDO MEMORY (LOT OF 2) ***XLNT***
SMART SM364SCSP83SI15 PIPELINE RAM CARD ***XLNT***
DIAMOND 22030051-019 VIDEO CARD ***XLNT***
SEAGATE CHEETAH ST34501N 4.55GB 50PIN HARD DISK DRIVE ***XLNT***
