福建中立恒自动化设备有限公司
一、摘要 PLC是一种专门在工业环境下应用而设计的数字运算操作的电子装置。
它采用可以编制程序的存储器，用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令，并能通过数字式或模拟式的输入和输出，控制各种类型的机械或生产过程。PLC及其有关的外围设备都应按照易于与工业控制系统形成一个整体，易于扩展其功能的原则而设计。在工业生产的各个领域，机械加工企业为了提高生产效率，采用机械化流水作业的方式，对不同类型的零件分别组成的自动生产线。随着产品机型的更新换代，生产线承担的加工对象也随之改变，这就需要改变控制程序，使生产线的机械设备按新的工艺过程运行，而继电接触器控制器系统是采用固定接线，很难适应这个要求。大型自动生产线的控制系统使用的继电器数量很多，随着PLC的应用日益普及,其使用方法简单,便于掌握,且可靠性,抗干扰性很强,自身具有完善的功能.模块化的结构,使其在工业生产线上的应用越来越广泛。
发展趋势：1.向高速度、大容量方向发展
为了提高PLC的处理能力，要求PLC具有的响应速度和更大的存储容量。目前，有的PLC的扫描速度可达0.1ms/k步左右。PLC的扫描速度已成为很重要的一个性能指标。
在存储容量方面，有的PLC可达几十兆字节。为了扩大存储容量，有的公司已使用了磁泡存储器或硬盘。
2.向超大型、超小型两个方向发展
当前中小型PLC比较多，为了适应市场的多种需要，今后PLC要向多品种方向发展，特别是向超大型和超小型两个方向发展。现已有I/O点数达14336点的超大型PLC，其使用32位微处理器，多CPU并行工作和大容量存储器，功能强。
INA LINEAR BEARING KBO2045PP
EASTERN AIR DEVICE LINEAR ACTUATOR 12V 4PH 0.65A 1.8º LA23GCKA-3E
SOLA HEVI-DUTY SDP 2-24-100T POWER SUPPLY 115/230 VAC 24 VDC 2.1 AMP
DM SGE 13W BIAX D COMPACT FLUORESCENT BULB 2 PIN F13DBX23T4/SPX27 LOT OF 7
DM S GE 13W BIAX D COMPACT FLUORESCENT BULB 2 PIN F13DBX23T4/SPX41 LOT OF 6
REDINGTON 7600-631DC COTER 5-30VDC
INTERNATIONAL FIBER SYSTEMS VR1100-R3 VIDEO RECEIVER BOARD
2000 CWP SHARPE 3/4" STAINLESS FULL PORT BALL VALVE CF8M LOCKING HANDLE
DODGE TAPER LOCK BUSHING 2517 X 2-5/8 KEYWAY 117111
150) QUALTEK FOAM MEDIA FAN FILTERS 09450-M/45 OF 30 SETS (5 IN EACH)
DM SPARKER SCHRADER BELLOWS 1/4" FLOW CONTROL VALVE 32500219
DM SALLEN BRADLEY FLEX I/O 1794-IB16 1794-OB16 WITH BASE TB3/A
FOXBORO 3-15 PSI RECEIVER GAUGE 0-10 SQUARE ROOT 0-100 LINEAR 1/4"
DAYTON MOTED BALL BEARING 3/4" BORE 3FCU9
DM SRULAND 1-7/16" SHAFT COLLAR SP-23-F
DM SAURORA MW-12KZ FEMALE ROD END BEARING
DM SAURORA MG-12KZ FEMALE ROD END BEARING
WHEELOCK FIRE ALARM WEATHER RESISTANT WBB W/ AH-24 FIRE ALARM HORN
SKF SINGLE ROW BALL BEARING 6303JEM
YANG AN 94V-0 MOTHERBOARD YA-3E114139
DM SMARTIN 1" SPROCKET 16 TEETH #40 CHAIN 1/2" PITCH 40BS16 1
BOWER TAPERED ROLLER BEARING 41286
BOWER ROLLER BEARINGS 394 A
MRC SINGLE ROW BALL BEARINGS 208SG
SIEMENS PROCESSOR MODULE 6DD1600-0AF0
DM S SIEMENS PROCESSOR MODULE 6DD1600-0AF0
BREWER MACHINE AND GEAR CO IDLER SHAFT W/ SET COLLAR SO4
HUMPHREY 1-1/4" BORE PNEUMATIC CYLINDER MODEL 25 H SERIES 25-D-1/2
DM S WELDMARK SINGLE-FLINT SPARK LIGHTERS PART NO. WM3001 LOT OF 6
TURNER LP-4004-144 12 FOOT ADAPTER HOSE
WELDMARK ELECTRODE HER MHT-250
INA ½" PILLOW BLOCK BEARING GY1008-KRR-B
ITI 60-278 HARDWARE INTERIOR SIREN PIEZO WHITE 60278
ALLEN BRADLEY 2.5-4.0 AMP CIRCUIT BREAKER 140M-C2E-B40 W/ 100-K05*10
OMRON ENCLOSED DIGITAL TOTAL COTER H7EC
NATIONAL BASIC SENSOR NBS 50-300ºF THERMOMETER 4-1/2" FACE W/ 3-1/4" STEM
TIMKEN DRIVES 120-3SET LINK 42384
NUMATICS SOLENOID VALVE 150 PSIG MAX AIR 110/120 VAC 153SS43CK
JAF 2-055-021-375-00 BALL BEARING
DM S OILITE AA816-02B SLEEVE BUSHING 0.5" ID x 1" OD x 1" W LOT OF 10
AQUATRAC INSTRUMENTS SMRTAS CIRCUIT BOARD
MERSEN 3" GRAPHILOR BURST DISC SERIES 3 100 PSIG
HENRY 891B-1/4 REFRIGERATION STRAINER 1/4" FLARE
FAFNIR SINGLE ROW BEARING 209KDG
NSK BEARINGS 6006ZZCE, 079147-01-AS
TIMKEN SHIELDED BALL BEARING 204KDD
10 FOOT BRAIDED STAINLESS STEEL HOSE W/ FEMALE FITTINGS
WARNER ELECTRIC PHOTO SCANNER MCS-625
RUB INC 1" BRASS BALL VALVE 600 CWP CW617N
WARNER ELECTRIC MCS-626 PHOTOELECTRIC PHOTOSCANNER CONTROL 7105-448-002
HENRY 3/4" STRAIGHT THRU RELIEF VALVE 5242 400 PSI
ASCO 8211C7 SOLENOID VALVE 2 WAY VALVE NC 300 PSI 120VAC 1/2" 16.7 WATTS
DODGE FB5016 X 1/4 CHAIN COUPLING FLANGE 099110
CSA LL110850 3 PRONG POWER CORD W/4CR-28-906 STARTER RELAY MOTOR PROTECTOR
SIEMENS SIMATIC S7 DIGITAL INPUT 6ES7421-1BL00-0AA0
13} REN # 50-1 CHAIN CONNECTION LINK SC 50-1/26B25 LOT OF 13 PIECES
SKF 6308 JEM RADIAL/DEEP GROOVE BALL BEARING 40mm x 90mm x 23mm
DM SALLEN BRADLEY SLC 500 1 INPUT 1746-OB16/D 1 OUTPUT MODULE 1746-IB16/C
DM SPRC 4MAX 1/2" I-BEAM C-CLAMP W/ LOCKNUT
APPLETON BJ4 5075 BONDING JUMPER 1/2"-3/4" TRADE SIZE MOVEMENT SIZE 4
CONSOLIDATED S-3507 2RS NR DEEP GROOVE BALL SKF 62307 Fafnir W307PPG
DM SCONSOLIDATED S-3507 2RS NR DEEP GROOVE BALL SKF 62307 Fafnir W307PPG
DM SGENUINE EPSON ERC-38 B/R BLACK/RED RIBBON CARTRIDGE TMU220 TMU230A
TELEBYTE LINE DRIVER WITH CONTROL SIGNALS AND LCD DISPLAY 224F
POWERS 0° TO 100°F TEMPERATURE TRANSMITTER REMOTE BULB 184-0036
ALLEN BRADLEY MOTOR CIRCUIT PROTECTOR 1.0-1.6 AMP 140M-C2E-B16 W/ 100-K05*10
SPEEDAIRE 4ZL79 1/4" MICRO-MIST LUBRICATOR
AMI 1-3/16" PILLOW BLOCK BEARING 2 BOLT UC206-19 UCLP206-19 UC206 LP206
SIEMENS 8CH INPUT ANALOG MODULE 505-6108A
YAMATAKE-HONEYWELL J-HAM10 ANALOG INPUT MODULE
EDWARDS 93-LA BEACON STROBE LIGHT REPLACEMENT LENS AMBER
TB WOODS SKX1 5/8 SG BUSHING
MARTIN SHEAVE 1 B 44 SH 4-3/4" OD B-BELT 1B44SH
MARTIN SHEAVE 1 B 42 SH 4-1/2" OD B-BELT
3/4" MILWAUKEE BALL VALVE 1000 WOG CARBON BODY W/ STAINLESS HANDLE 18-23
SPIRAX SARCO 3/4" CAST IRON Y-STRAINER 250CI
EATON WHEELOCK EXCEDER LED CEILING MOT RED FIRE SPEAKER 1/8-2W LSPKRC
DM SDODGE TAPER LOCK BUSHING 1" BORE 2-1/4" OD 1610x1-1 KW 117159
DM S DM SDODGE TAPER LOCK BUSHING 1" BORE 2-1/4" OD 1610x1-1 KW 117159
REPARIED 4 CHANNEL VIDEO RECEIVER INTERNATIONAL FIBER SYSTEMS IFS VR6010
(2DM S CHEMTROL NIBCO 1/2" FEMALE ADAPTER SOC THD 1835-005 F439 5
AMETEK USG 15 PSI GAUGE LIQUID FILLED 4.5" FACE 1/2" NPT 170022XLG 1981LG
DM S GENUINE CISCO 72-2632-01 REV A0 CAB-STACK-50CM STACKWISE STACKING CABLE LOT
IOTA 120-277 VAC I-80 EMERGENCY LIGHTING EQUIPMENT LPTS 3.5W
ATC AUTOMATIC TIMING CONTROLS ATCOTROL 30 MINUTE TIMER 115/230 VAC TYPE 305
KESSLER ELLIS DESKTOP HANDHELD SERIAL DOT MATRIX PRINTER P10001
POTTER AMSECO MBA-8-24 8" FIRE BELL 24VDC 25mA
INTERMATIC 40 AMP TIME SWITCH 125 VAC 1 HP T103
INTERMATIC 40 AMP TIME SWITCH 125 VAC 1 HP T103
WEKSLER 5" BI-METAL THERMOMETER -40°F TO 120°F 4" STEM BM5-3-2
DM SNORGREN 250 PSIG SHUT VALVE 150° MAX T08-300E1PA
MARTIN 3/4" #60 ROLLER CHAIN SPROCKET 60BTB21H
50) U63265.025.0500 TOGGLE BOLT 5" LONG X 1/4" 11K31DM SOF 50
AMETEK 3-15 PSI RECEIVER GAUGE 4-1/2" DIAL 1/4" ANPT 0-6 LINEAR 1365 1322
MARTIN TAPER-LOCK BUSHING 2517 11/16
MARTIN TAPER-LOCK BUSHING 2517 5/8
MARTIN TAPER-LOCK BUSHING 2517 15/16
DODGE 2517 x 1/2 KW TAPER-LOCK BUSHING
DODGE 2012 X 1-3/8-KW TAPER-LOCK BUSHING
RUSSTOLL 30A 250V 20A 600VAC 8004
RUSSTOLL 30A 250V 20A 600VAC 8004-RS
EUCLID MEGA POSI PLUS E-3710S BRAKE KIT EUCLID E-3710S REPAIR KIT
MARTIN 26 TOOTH CHAIN SPROCKET 1¼'' BORE DIAMETER 50B26
GENUINE CANNON GPR-4 BLACK TONER CARTRIDGE IR5000/5020/6000 4234A003 (AB)
IVERSAL 120 VAC WATT REDUCER RAPID START BALLAST 60 Hz 446-L-SLH-TC-P
DM S IVERSAL 120 VAC WATT REDUCER RAPID START BALLAST 60 Hz 446-L-SLH-TC-P
TSUBAKI 16 TEETH 1" BORE W/ KEYWAY 1-1/4" LENGTH THROUGH BORE H60B16F-1
FAG DEEP GROOVE ROD BALL BEARING 6310.C3
DM SBREWER MACHINE GEAR 50B17F ROLLER CHAIN SPROCKET 17 TEETH
SWAGELOK SS-4-HLN-6.00 316 STAINLESS HEX NIPPLE MALE 1/4" NPT 6" LONG
SWAGELOK SS-12-TA-1-8 MALE TUBE ADAPTER 3/4" TUBE OD X 1/2" MNPT
SWAGELOK MS-IG-1610 GAP INSPECTION NO GO GAGE R1ND40492S 1610/25M0 SERIES
LINAK DPG1K00-000007 SWITCH
TB WOOD'S TRIGGER MODULE TM02/TM-02
DM SCISCO FET-10G 10-2566-02 FTLX8570D3BCL-C2 MINI GBIC TRANSCEIVER LOT 5
FURNAS ELECTRIC VEE-ARC 404-055 F BASE DRIVER BOARD
SONITROL SONIP I/O MODULE 29012101
SONITROL SONIP AUDIO 8 AUDIO BOARD 29016201
201DM SGENUINE EPSON T605B MAGENTA K3 INK CARTRIDGE STYLUS PRO 4880 110ml
DM S201DM SGENUINE EPSON T605B MAGENTA K3 INK CARTRIDGE STYLUS PRO 4880 110ml
COOPER WHEELOCK EXCEDER RED LED FIRE ALARM SPEAKER LSPKR 110758 WALL RED
MAGNALOY MODEL 500 COUPLING M50011812S 1-9/16 BORE X 3/8 KEY
SNEN TWO WG-D HGLUIDE SHOE WG-DB WITH ALL MOTING SCREWS
AMERICAN FLORESCENT BLACK LIGHT 120VAC 22" LONG SEL15-BL
BROWNING B 1 7/8 SPLIT TAPER BUSHING 1-7/8"
TREND 5" 0-200°F THERMOMETER W/ 0-90° PROBE 5-1/4" LONG
WIKA 5" 0-200°F THERMOMETER W/ 0-90° PROBE 8 5/16" LONG
MARTIN SH BUSHING SK 1-¾ QUICK DISCONNECT BUSHING 1-¾ " BORE
WEKSLER THERMOMETER 9" CASE 6" STEM 0-160ºF AS5L918ALP
ALLEN-BRADLEY SIZE 0 MOTOR STARTER 120V COIL 600V 5 HP 1Ø 500F-A0D930
MG MODEL SS-66 ELECTRONIC SIREN 5" BELL WEATHERPROOF SWIVEL BRAKT 6-12VDC
LOVEJOY 4J 5/8" W/ SIZE 4 S-FLEX COUPLING