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。
PENTEK 150469-75 FILTER HOUSING SINGLE CARTRIDGE SIZE 3/4 WITH FILTER
EDWARDS G4HFWF-S2VMC HF SPEAKER/STROBE 25V WHITE FIRE
AMS 175 FIRE ALARM CIRCUIT BOARD CARD | AMS175
SIEMENS MSF11T11 FRACTIONAL HP MANUAL STARTER
WHEELOCK ET-1010 Vandal Lock Resistance P80169-004/#P80835 Fire Alarm Speaker
DAYTON 2E652 BUILT-IN THERMOSTAT 25 AMP 240V AK
7 WWF F3350X04X04 45* Street Elbow 1/4" NPT Male to 1/4" NPT Female
FALK STEELFLEX 1070T10 COVER GRID FOR 70 1070T10 STEELFLEX COUPLINGS
FALK 762814 1060T FOR 60 1060T STEELFLEX COUPLING GRID
DM S FALK 762814 1060T FOR 60 1060T STEELFLEX COUPLING GRID
AXIS 5700-401 SPR T8124 HIGH PoE 60W MIDSPAN 1 PORT 5016-001-01 MDSPN 1P
Simplex 4906-9151 S/V M-C Non-Address Wall Speaker Strobe Red 0743258
WATTSTOPPER LMCT-100-U | WIRELESS CONFIGURATION TOOL WITH CASE | LMCT100U
Lot of 11 Hubbell Twist-Lock 30 Amp 250V 3 Phase AK
Cutler-Hammer 9253C03H09 Neutral Sensor 1600:1A 60Hz 600V
TOA MEDICAL ELECTRONICS NO.2122 9507 x100470995x FIRE ALARM CIRCUIT BOARD
Take Out Pentek Water Filter Cartridges
SIMPLEX 562-093J BMUX BT I/O FIRE ALARM PANEL BOARD 562093 REV J
RTP CORP 021-5230-0131 | FIRE ALARM CIRCUIT BOARD CARD | 140-5741-000F
RFL INDUSTRIES HD-49058 RFA-4 49055-1 INTERFACE CARD FIRE ALARM | HD49058
INC 1 401 32 ZFIT EST EDWARDS FIRE ALARM CIRCUIT BOARD CARD 140132
GREENGATE ROHS OAC-DT-2000 CEILING OCCUPANCY SENSOR DUAL TECH WH FIRE ALARM
ABB D-984-0284-02 | EXTENDER CARD 35-PIN FLAME SCANNER FIRE ALARM CIRCUIT BOARD
ALLEN BRADLEY 1771-IQ16/C ISOLATED DC FIRE ALARM INPUT MODULE 24VDC | 1771IQ16C
ABB 3BSE007698R1 FIRE ALARM SS110 VOLTING IT DC 24V CIRCUIT BOARD W/ TERMINAL
STONCO FLOODLIGHT LAMPHER 40L STO40L 40-L 150W WPF ADJ LAMPH 1/2M
ARLINGTON 3 3/8"x3 3/4"x2.5" DEEP STEEL ELECTRICAL
STEEL CITY 72171 1 2 1/8" DEEP STEEL SQUARE OUTLET
ARLINGTON 2 1/8" DEEP STEEL SQUARE OUTLET
ARLINGTON 2 1/8" DEEP STEEL SQUARE OUTLET 7/8", 1 1/8" KNOCKOUT
Honeywell L91D 1015 Proportioning Pressuretrol Fire Alarm
BERGSTROM 3542577C2 ACCUMULATOR 526333C
Square D NQOD242ASP-N Powerlink Power Interface Module NQOD242ASPN Flawed
Simplex 562-169D 16 LED Module Circuit Board Fire Alarm
PLC DIRECT BY KOYO D2-09B DIRECT LOGIC 205 9 SLOT CHASSIS 110/220 VAC FLAWED AK
WATLOW 146E-1603-3000 TEMPERATURE CONTROLLER 120VAC REGULATOR TYPE K T/C | AK |
6 Crouse Hinds 1/2" Compression Fittings
HONEYWELL H705A1029 H705A SOLID STATE ENTHALPY CONTROL 24VAC HH57AC077 AK
PHILLIPS CHLORIDE 175011-001-0001 WMLK WALL MOT LENS KIT FIRE ALARM
COM TROL SS | RELAY FIRE ALARM CIRCUIT BOARD CARD
LOT OF 14 ORTRONICS OR-KSFP4-88 FP KEYST4 HOLE SG WHITE
SIEMENS RIXSON SDH-3D 996 500-690395 ELECTROMAGNETIC DOOR HER 24VDC
LOT OF 13 LEVITON 41080-4BP QUICKPORT SINGLE-GANG WALL PLATE 4 PORT
Gould ITE Siemens FJ FJ3 FJ3B200L FJ3B200 3 pole 200 Amp 600v Circuit Breaker
NNB GE THQB THQB32045 3 Pole 45 Amp 240V Silk Screen Bolt-On Circuit Breaker
TRANE UHEC-T5100 AIR HEATER ACCESSORY THERMOSTAT TYPE 236-705 AK
ELECTRONIC THEATRE CONTROLS AUTOMATIC LOAD CONTROL RELAY 7180A1205 ALCR-PP
ERICO CADWELD SSC2Q IP-A HORIZONTAL SPLICE CABLE M 4/0 AWG CONC 90
FURNAS D71221-32 COIL DUAL VOLTAGE MISSING 1 SCREW FLAWED "AK"
SIMPLEX 2190-9163 CONTROL ZAM SURFACE MODULE COVER PLATE 3333 BAUD RATE
MYTECH OMNI-US2000 OCCUPANCY SENSOR ULTRASONIC CEILING MOT 360 FIRE ALARM
MOXA EDS-205A-M-SC INDUSTRIAL ETHERNET SWITCH 12/24/48VDC 0.25A EDS-205A-M-SC-T
TOA MEDICAL ELECTRONICS NO.2121 9502 x100470619x FIRE ALARM CIRCUIT BOARD
General Electric 9F60BBD003 Type EJI Fuse Size B 5.50KV .25/60cy
ROCKWELL GOSS E8111 FIRE ALARM CIRCUIT BOARD CARD 1-E8111 MISSING PLASTIC FOOT
EDWARDS 270A-SPO | NON-CODED MANUAL PULL STATION FIRE ALARM | 270ASPO
SIEMENS HA161234 AUXILLARY SWITCH 30A-200A TYPE VBII ACCESSORIES FIRE ALARM
ALARM CONTROLS CORP. PS1-111 | SINGLE GANG EXIT PUSH PLATE FIRE ALARM
LIEBERT 4C13991G | ESS-A-O 2596 FIRE ALARM CIRCUIT BOARD CARD | 4C13992P1
WEIDMULLER PICOPACK V/I 998309 011912 LR111247 FIRE ALARM
KIDDE FENWELL 880-0043D PUSH PULL FIRE ALARM WEATHER PROOF BACK NON-CODED
Cyber LED Emergency Light TCL4W-SD RL2LED4WH-SD Self Diagnostic 120/277v
RSG DH24120FPC | ELECTROMAGNETIC DOOR HER RELEASING DEVICE FIRE ALARM
EDWARDS 1508-AQN5 | ELECTROMAGNETIC DOOR HER SURFACE WALL MOT 1508AQN5
Fenwell Detect-A-Fire Heat Detector Fire Alarm
NUPRO SS-4CA-50 50-150PSI POPPET CHECK VALVE STAINLESS
Terlyn Vapure CVX Series Peristaltic Feed Pump 24 VAC 60 Hz
GE THQB 3 pole 90 amp 240v THQB32090 Circuit Breaker NNB
DM S GE THQB 3 pole 90 amp 240v THQB32090 Circuit Breaker NNB
TN SONIC FLOW 885824 | CIRCUIT BOARD
WATLOW 146E-1603-4000 TEMPERATURE CONTROLLER 120VAC 10VA 50/60HZ TYPE K T/C AK
ASCO POWER TECHNOLOGIES 4OO SERIES SURGE PROTECTIVE DEVICE FIRE ALARM
0 AIM 28-91007 | FIRE ALARM CONNECTOR KITS | 19-046603-000A
LOT OF 7 ARLINGTON 4"x2"x1.5" DEEP SINGLE GANG SQUARE EXTENDER
Johnson Controls Class 2 Transformers #V65T42-0 120/208/240 VAC.60hz
MITSUBISHI ELECTRIC K70B-CE THERMAL PAPER
SCHNEIDER ELECTRIC 140CRA93100 RIO DROP CHANNEL AK
Listing FIRELITE ALARMS / HONEYWELL D355PL INTELLIGENT NON-RELAY DUCT SMOKE DETECTOR
HUBBELL CS120W SINGLE POLE SWITCH WHITE 20 AMP 120/277VAC OF 10
STI 2099-9815 STOPPER II PULL STATION PROTECTOR 9 VDC FLUSH MOT FIRE ALARM
SIMPLEX 565-627C | CONTACT CLOSURE DACT FIRE ALARM CIRCUIT BOARD | 565-598A
PENN TPE 57-1 THERMOSTAT
JOHNSON CONTROLS T-5210-116 TRANSMITTER 50-150 DEG F FIRE ALARM T5210-116
BAPI BA/LCH2-R "L-COMBO" TEMP/HUMIDITY WITH SETPOINTS FIRE ALARM BALCH2R
Siemens SET-C185-W-WP-ALERT Speaker Strobe
Siemens 500-636190 SET-177-CW-WP Ceiling White Speaker Horn/Strobe 106033 FA
Square D EDB EDB24020 2 Pole 20 Amp 480V Yellow Circuit Breaker
Square D EDB EDB24020 2 Pole 20 Amp 480V Yellow Circuit Breaker
FACTS ENGINEEERING FO-4AD2DA-1 P9208B PCB CIRCUIT BOARD FO4AD2DA1
OMRON K3TX-VD31A DIGITAL DISPLAY PANEL 100-240VAC 15A
Siemens 500-636057 SET-S17-CW-WP White Speaker Strobe 116765 FA
BOGEN PMM-2B PREAMPLIFIER ACCESSORY CIRCUIT BOARD 94-5173-01 PMM2B AK
OF 20 ERICO CADWELD CA25 WELD MATERIAL CANISTERS EACH WEIGHS 1 OZ
OF 19 ERICO CADWELD CA32 WELD MATERIAL CANISTERS EACH WEIGHS 1.2-1.3 OZ
Cat 5E Patch Cable 10Ft ECAT5-4PR-10-WH Male to Male *Lot of 17"
HONEYWELL 63690 120B MAIN RACK BOARD Z522807500003
EMERSON LIEBERT 02-790859-00 | PWA ISOLATION RELAY ASSY CIRCUIT BOARD | KMGM
SIEMENS ZIC-4A | BLACK FRONT ZINDICATING CARD FIRE ALARM | 580-033050-4
SIEMENS NIC-C FIRE ALARM CONTROL IT NETWORK INTERFACE COMPONENT PCB NICC
Kohler 365289 Low Fluid Sensor Assembly AK
Liebert Circuit Board SiteGate-E 166523G4 e-assembly AK
LOT OF 7 EDWARDS GRSW ROOM SIDE WIRING PLATE
EDWARDS 329D-AW CHIME FIRE ALARM 20/24 VDC 329DAW | AK
Lightstat TGH1 Light Sensitive Automatic Setback Thermostat 2 Wire 24Volt AK
POTTER 3992720/D ADDRESSABLE PULL STATION FIRE ALARM DUAL ACTION
ALLEN BRADLEY 2711-M3A18L1 Series A Panel View 300 Micro 24VDC 2.5W DC
CUTLER HAMMER E26BL | FIRE ALARM RED BLUE GREEN STACKLIGHT BASE | E26BL
SIMPLEX 2120 CONTROLLER ASSY. 562-530C 562-531G FIRE ALARM CIRCUIT BOARD CARD
Lot of 15 1 1/4" to 1 1/2" 2 Set Screw Conduit Combination Coupling
6 Crouse Hinds 1" Set Screw Conduit Connector
ELECTROMAGNETIC IND INC EA1VE VOLT METER 60HZ 600FSV
DUAL LITE EZ-2 SELF-CONTAINED EMERGENCY LIGHTING IT 2 HEADED EZ2
Traxon Nano Liner XB-9 XB.NF.5114100 Beam Angle 40"x10"
HUBBELL HBL4750C075IV SURFACE METAL RACEWAY 7.5" COVER 10 IN EACH AK
EDWARDS EST/GE 757-7A-SS25 INDOOR STROBE/SPEAKER FIRE ALARM APPLIANCE 7577ASS25
PEPPERL FUCHS K166005A_06A LEAD EDGE SENSOR ASSEMBELY K166005A06A 192888
Assorted Canon Camera Cases
LOT OF 6 ARLINGTON OCTAGONAL 3.5"x3.5"x2 1/8" DEEP WITH 7/8" KNOCKOUTS
Sporlan MB19P2 3/4" FPT less coil solenoid valve
Siemens S54319-S27-A FDBZ-RTL Remote Test Switch
TIMKEN FAFNIR 1108KRR MOTED LOCKING COLLAR BALL BEARING WITH FLANGE
LOT OF 7 WHEELOCK SFP Flush Mot Red Fire Alarm Back Mot SFP
HUBBELL CS8264C CONNECTOR TWISTLOCK 2 POLE 3 WIRE GRODING 50 AMP 250VAC
DM S HUBBELL CS8264C CONNECTOR TWISTLOCK 2 POLE 3 WIRE GRODING 50 AMP 250VAC
QMARK CDF-TR7 TRANSFORMER WITH 24 VOLT CONTROL FIRE ALARM | CDFTR7
EDWARDS 1504-AQN5 ELECTROMAGNETIC DOOR HER W/ FLUSH WALL MOT FIRE ALARM
Radionics Inc. D1255 Signal System Control it Sub Assembly Keypad AR-4151
Shallco 2615C Relay Control Switch Series 26 25A-120VAC AK
LOT OF 6 INTERMATIC K4500 SHORTING CAP LOCKING TYPE 105-480V BLUE 105480V
FALK 704616 50T HUB STEELFLEX COUPLING BORE 1.250 KW 1/4 X 1/8
IFIER 237-9993-E | FIRE ALARM CIRCUIT BOARD CARD | 410-1725-D | 2379993