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
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DEIF AMMETER 0-40A X 5 59469-57
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DEIF AMMETER CT 50/5A SCALE 0-50A X 5
DEIF AMMETER CT 200/5A SCALE 0-200A X 5
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ABB CT-WBS.22S IMPULSE AND FLASHER TIME RELAY 1SVR730040R330024-240VAC/24-48VDC
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TELEMECANIQUE RE22R2AMR ON-DELAY TIMING RELAY 24-240VAC/DC
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JANSSEN SPW RELAY
LONDON ELECTRONICS PRO-3-R-24A PANEL DIGITAL METER 24VAC
SAB NIFE A246 PCB B-01/82
SAB NIFE 4236 PCB B-10/85
SAB NIFE A212 PCB 4233
SAB NIFE A271 PCB B-10/84
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ALLEN BRADLEY CAT 193-11AB20 OVERLOAD RELAY 1.4-2.0A CAT193-T1APM
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EATON DIL A-40 MAGNETIC CONTACTOR XTRE10B40 220VDC
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TELE OM 1 TIME RELAY 12-240V
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DEHNGAP DGP B 255 SPD/N-PE 900 130 255V
DEHNGUARD DG MOD 750 952 017
KEMA K
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PHOENIX CONTACT FL SWITCH 8TX INDUSTRIAL ETHERNET SWITCH2832218
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SE A9M17071 DIGITAL ELECTRICITY METER IME4ZR 230-400VAC 3VA
SE A9M17076 3-PH POWER METER IME3ZR 400V 0-63A
BEIJINGHE PH307FFD SIGNAL ISOLATOR 24VDC
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D BA9038.12 THERMISTOR MOTOR PROTECTION RELAY 0029738 120VAC
LOVATO LA2E MIN CURRENT RELAY LA2EC-75-24
D AA 9839.11 TIMER RELAY 24VDC
D AA 9906.82 TIME RELAY
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SCHLEICHER KZD31K TIME RELAY 05400717 48V
SCHLEICHER KZT71K TIMER RELAY 06002698 220V
LRD 35 OVERLOAD RELAY 30-38A
V3 3-POLE SWITCH BODY FOR SWITCH DISCONNECTOR 63A
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POLY PHASER IS-B50LN-C1 ANTENNA
POLY PHASER IS-B50LN-C1 ANTENNA
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STAR ELECTRICAL CURRENT TRANSFORMER 15015 VA 6
Conzerv EM6400 Load Manager Digital Control VER 03.03.05
