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。

以下链接皆有货

SQUARE D CIRCUIT BREAKER LIL363008041 300A 600V 3P W/1500-3200A TRIPRRA

 SQUARE D CIRCUIT BREAKER LOT OF 3 QOB350 50A 240V 3P 10KA

SQUARE D CIRCUIT BREAKER MA36450 I-LINE 450A 600V 3P

SQUARE D CIRCUIT BREAKER MA3800F 800A 600V 3P

SQUARE D CIRCUIT BREAKER MAG-GARD LAL3640036M 400A 240V 3P 50/60HZ

SQUARE D CIRCUIT BREAKER MAL267001212 700A 600V 2P W/AUXILIARY SWITCHRR

SQUARE D CIRCUIT BREAKER MAL36000 1000A 600V 3P

SQUARE D CIRCUIT BREAKER MAL36450 450A 600V 3P W/ADJUSTABLE TRIP

SQUARE D CIRCUIT BREAKER MAL3680036M 800A 600V 3P W/AUX SWITH/SHUNT TRIPAR W

SQUARE D CIRCUIT BREAKER MAP361000 100A 600V 3P

SQUARE D CIRCUIT BREAKER MAP36600Z 600A 600V 3P W/TRIP ADJUSTMENT 800AR

SQUARE D CIRCUIT BREAKER MEF36400LSG MICROLOGIC 400A 600V 3P W/SOLID STATE TRIP

SQUARE D CIRCUIT BREAKER MEF436LSIG MICROLOGIC 400A 600V 3P W/SOLID STATE TRIP 1

SQUARE D CIRCUIT BREAKER MEF836LSI SER 3 800A FRAME 600A ME8600RP 3P 600V

SQUARE D CIRCUIT BREAKER MGF36500 POWERPACT 500A 600V 3P

SQUARE D CIRCUIT BREAKER MH36700 I-LINE 700A 600V 3P COSMETIC DAMAGERRA

Square D Circuit Breaker MHL360800 800 Amp Ohm Tested

SQUARE D CIRCUIT BREAKER MHL36175 175A 480V 3P W/ADJUSTABLE TRIP

SQUARE D CIRCUIT BREAKER MHL36200 200A 600V 3P

SQUARE D CIRCUIT BREAKER MHL3645025DC1679 450A 600V 3P W/UNDERVOLTAGE/AUXAR

SQUARE D CIRCUIT BREAKER MHL3645025DC3903 450A 600V 3P W/AUX /UNDERVOLTAGEAR

SQUARE D CIRCUIT BREAKER MHL367001287 700A 600V 3P W/AUXILIARY SHUNT TRIP UNDERV

SQUARE D CIRCUIT BREAKER MHL367001288 700A 600V 3P W/SHUNT TRIP/AUXILIARYAR

SQUARE D CIRCUIT BREAKER MHL368001288 800A 600V 3P W/AUX SWITCH/SHUNTRR

SQUARE D CIRCUIT BREAKER MHL369001287 900A 600V 3P W/AUXILIARY/UNDERVOLTAGEA

SQUARE D CIRCUIT BREAKER MHL369002343 900A 600V 3P W/UNDERVOLTAGE/AUXRR

SQUARE D CIRCUIT BREAKER MHP36800 800A 600V 3P

SQUARE D CIRCUIT BREAKER MJA36350 I-LINE 350A 600V 3P

SQUARE D CIRCUIT BREAKER MJL36700 POWERPACT 700A 600V 3P

SQUARE D CIRCUIT BREAKER MOLDED CASE QL23200 TYPE Q2L 200A 240V 3P 50/60HZ 1YR W

SQUARE D CIRCUIT BREAKER NELC1236LI 1200A 600V 3P W/800A Trip

 SQUARE D CIRCUIT BREAKER NHDL36150ABSA POWERPACT 150A 600V 3P

Square D Circuit Breaker Operating Mechanism 9421LN4 Ser. B W/ 9421LH6 Handle

SQUARE D CIRCUIT BREAKER PAF361600DC1680 1600A 600V 3P Type PAL AUX SWITCHAR

SQUARE D CIRCUIT BREAKER PGA261002 1000A 600V 2P

SQUARE D CIRCUIT BREAKER PJF36080U31AAFBDSLMA POWERPACT 800A 600V 3P PJ 800A

SQUARE D CIRCUIT BREAKER POWERPACT PJ600 PJL36000S60 600A 3P 600V

SQUARE D CIRCUIT BREAKER POWERPACT QG 150 QGA221501 150A 240V 2P 50/60HZR

SQUARE D CIRCUIT BREAKER PXF362000 2000A 600V 3P SENSOR FRAME

SQUARE D CIRCUIT BREAKER Q232110 I-LINE 110A 240V 3P

SQUARE D CIRCUIT BREAKER Q2-32150 I LINE 150A 240V 3P

SQUARE D CIRCUIT BREAKER Q2H22225AC I-LINE 225A 240V 2P COSMETIC DAMAGE

SQUARE D CIRCUIT BREAKER Q4L3250 250A 240V 3P W/ADJUSTABLE TRIP

SQUARE D CIRCUIT BREAKER QBA3200 POWERPACT I-LINE QB 200 200A 240V 3PRRAN

SQUARE D CIRCUIT BREAKER QBL32125 POWERPACT 125A 240V 3P

 SQUARE D CIRCUIT BREAKER QBL32225 POWERPACT 225A 240V 3P

SQUARE D CIRCUIT BREAKER QBP32150TP POWERPACT 150A 240V 3P

 SQUARE D CIRCUIT BREAKER QDA32110 I-LINE POWERPACT 110A 240V 3P 25KAAR W

SQUARE D CIRCUIT BREAKER QDA32150 I-LINE 150A 240V 3P

SQUARE D CIRCUIT BREAKER QDA32150 I-LINE 150A 240V 3P  Take Out

SQUARE D CIRCUIT BREAKER QGA221501 I LINE POWER PACT 150A 240V 2P

SQUARE D CIRCUIT BREAKER QGA32200 I-LINE 200A 240V 3P***COSMETIC DAMAGE***1YR WA

Square D Circuit Breaker QO120AFI 120V 20 amp Plug in Arc Fault 10kA Lot Of 4

SQUARE D CIRCUIT BREAKER QOB120VHEPD 20A 120V 1P 22KA GROUND FAULTRRANT

SQUARE D CIRCUIT BREAKER QOB3100VH1021 100A 120-240VAC 3P SERIES 2

SQUARE D CIRCUIT BREAKER QOB3701021 70A 240V 3P W/SHUNT TRIP

SQUARE D CIRCUIT BREAKER SOLID STATE TRIP NEF1236LS1 TYPE NEL SERIES 1 1200A 600

SQUARE D CIRCUIT BREAKER X BD90 POWERPACT 90A 240V 3P

SQUARE D CIRCUIT BREAKER X PowerPacT 125A 600V 3P BG125

Square -D circuit breaker, #LAF3640022M1212, 400amp

Square D Class 8501 Type X0 33 Industrial Control Relay Cool Rating 24/60 NOS

Square D Class 8538 Type SDG 14 Form CFTX4 Disconnect Switch

Square D Class 8539 Type SCT43 Series A Form CS 600V 15A Explosion-Proof Comb

Square D Class 8539SCG44 CFF4TX11 Series E Type 1 Combination Motor Controlle

Square D Class 9025 Type GXW-3 Temperature Switch

SQUARE D COMBINATION MOTOR STARTER 8538SBG63V02CX22 30A SIZE 0 TYPE 1RR

SQUARE D COMBO CONTROLLER DISCONNECT SWITCH 8903SPA61V81A12CF4P1T 60A 575V SER E

SQUARE D COMBO STARTER 8538 SCA24 SIZE 1 30A 600V SER D 3R COIL 31041-400-42 110

SQUARE D COMBO STARTER 8538SBA23V02S SIZE 0 18A 5HP 600V 3P 3R FUSIBLE SER K/COI

SQUARE D COMBO STARTER 8538SBW33V81FF4TX11 30A TYPE 4S SS SIZE 0 3P 110-120V

SQUARE D COMBO STARTER 8538SCA14V81FF4922T11 SIZE 1 30A 460/575V SER A 3R COIL 3

SQUARE D COMBO STARTER 8538SCG32V84CFF4H309P1TX22 30A SIZE1

SQUARE D COMBO STARTER 8539SCG43V81CFF4H300TX11 SIZE 1 15A 575V COIL 31041-400-4

 SQUARE D COMBO STARTER 8810SB02 SIZE 0 30A 480/440V SER A COIL 31041-400-48

SQUARE D COMBO STARTER ENCLOSURE 8539SDG42V81CFF4H301P72T 30A 120/240V 30HP 60HZ

SQUARE D COMBO STARTER EQ5300 W/RESISTANCE WELD CONTROL MODULE GM0200G/52045-062

SQUARE D COMBO STARTER SIZE 0 MOTOR 8SBG33S8V81ACF4P2T11X11Y35 30A COIL-575V 600

Square D Contact Replacement Kit 9998 LD-23 25 Amp 9998LD-23 E79

SQUARE D CONTACT SWITCH AIR BREAKER BLO34120 1200A 480V 514200212 CLASS 9810

SQUARE D CONTACTOR 8502 SEO2 FORM S SER A NEMA SIZE 3 3PH

Square D Contractor Nema 0 8536SBO2H30 SER A 240V Coil 6-18 Amp

Square D C-SD20168W PowerLogic Circuit Breaker Box Assy, Panel, 131367

Square D Current Trans

Square D Current Transformer 2 NR-201 Sealed

Square D D322NRB 60A 240VAC 3Pole Nema 3R General Duty Safety Switch

Square D D323NRB, Series F, 100A, 240V, 3PH4W, Fusible, NEMA 3R Disconnect--B

Square D Definite Purpose Contactor - 3 Pole - Open Type / 8910DPA53V02 -

Square D DH322FWK 60A Series B 3 Pole Stainless Steel Safety Switch

SQUARE D DISCONNECT 92446 600A 600V 4P NOT FUSIBLE

SQUARE D DISCONNECT D326N 600A 240V 3P FUSIBLE

 SQUARE D DISCONNECT H225N 400A 240V 2P FUSIBLE

Square D disconnect H323N 100A 240VAC 3p Fusible

SQUARE D DISCONNECT H325NR 400A 240V 3P 3R 4W FUSIBLE

SQUARE D DISCONNECT H364 200A 600V 3P SINGLE THROW FUSIBLE

SQUARE D DISCONNECT H365 400A 600V 3P SINGLE THROW FUSIBLE

SQUARE D DISCONNECT HU365AWK 400A 600V 3P 3R NONFUSIBLE

SQUARE D DISCONNECT HU366AWK 600A 600V 3P 3PH NEMA12 NON FUSIBLE

SQUARE D DISCONNECT HU664RWK 200A 600V 6P 3PH 3R NON FUSIBLE

SQUARE D DISCONNECT SWITCH D223NRB 100A 240V 2P 3R FUSIBLE

SQUARE D DISCONNECT SWITCH D224NRB 200A 240V 3P 3PH 3R FUSIBLE

SQUARE D DISCONNECT SWITCH D324N 200A 240V 3P 3PH FUSIBLE

SQUARE D DISCONNECT SWITCH D325N 400A 240V 3P 3PH FUSIBLE SER A2 SINGLE THROW 1Y

SQUARE D DISCONNECT SWITCH DU324 200A 240V 3P 3PH NON FUSIBLE

SQUARE D DISCONNECT SWITCH H223NRB 100A 240V 2P 3PH 3R FUSIBLE