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。

Dickow Pumpen NMB 26/210 Shaft Sleeve 00367111 524

Dickow Pumpen NMB 26/210 Wear Ring 00611521 512.2

Dickow Pumpen NMBHU 26/170 Gasket 00599364 400.15 04.39.397

DIGIMED DM 21 PH METER DM21 pHMETRO

DINA ELEKTRONIK DNDS 1D CENTRAL UNIT 24VDC

DIRECT LOGIC 205 KOYO PLC DL230 CPU D2-16ND3-2 IN D2-16TD2-2 OUT D2-06BDC1-1

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DOLD AA 9962.82 MINI TIMER 0016935 220V AA996282

DOLD AD 8851.14 LATCHING RELAY 0016370 220-230V

DOLD AI 303.0082 MINI TIMER

DOLD AI 305.300 TIMER RELAY 0025463 230VAC

DOLD AI 898 INSULATION MONITOR RELAY 0017606 230VAC/24VDC

DOLD AI 930.30/66 TIME RELAY 0040681 230V

DOLD AI 942.002/66 TIME RELAY 0018452 440VAC

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DOLD BA9038.12 THERMISTOR MOTOR PROTECTION RELAY 0029738 120VAC

DOLD BA9042 ASYMMETRY RELAY 0040770 400V

DOLD BA9042 RELAY 0028192 440VAC

DOLD BA9043 VOLTAGE MONITORING RELAY 380V BA9043/001

DOLD BA9094.28/100 TEMPERATURE MONITORING RELAY 0048953 230V

DOLD BA9094.28/100 TEMPERATURE MONITORING RELAY 0049908 230VAC

DOLD BD5987 SAFETY RELAY BD5987.02/001 230V 0040955

DOLD EP 9969 KLEMMENBELEGUNG 0016590 24VDC

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DOLD MI307 TIME RELAY

Dold MK 8804.12 220 VAC MK 8804

Dold MK 9906.82/024 Time Control Relay 220-240V AC/24V AC-DC MK9906.82/024

Dold MK 9989.72/024 Electronic Timer 0030945 220-240VAC/24V AC-DC

Dold MK9962.82/024 220 VAC, 24 VDC MK 9962

Dold MK9962N.82 Timer 0.05-300h Release Delay 12-240V 0054105 MK9962N82

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Dold MK9988.51 Timing Relay 0.3-0.6 Sec MK998851 Lot of 8 PC

Dold PS 323A.850 24V 120S 0040832 PS323A.850

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DONG-A ELECTRIC DMC-40B MAGNETIC CONTACTOR 380-400V/400-440V

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DONG-A ELECTRIC DTH40 THERMAL OVERLOAD RELAY 18-26A

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DP PUMPS MEGACONTROL KSB NR 01123861 BOOSTER CONTROLLER DUIJVELAAR POMPEN

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DYNALCO SPD700 DIGITAL TACHO METER - RPM METER

DYNALCO SST2400-1 SPEED SWITCH TRANSMITTER

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E POLIPODIO SRL AF2C65W AFOULMATIC SYSTEM 90-260VAC

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E.G.O. 7718000900 INVERTER DRIVE F8204801 200-240V

E.G.O. 7718001400 INVERTER DRIVE F8303601 380/480V E3071539 DAMAGED BOTTOM BODY

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Eaton 9122-IS-CM MTL Fisco Power Supply IIB Crouse Hinds Series

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EH HTA 380 WETZER CONTACTER 220V

EL ETN 1441 THERMOSTAT 250V 16A

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Electromatic SA 205 220 Delay on Operate SA205 220 VAC 8-180 Sec

ELECTROMATIC SA 205 724 DELAY ON OPERATE 24VDC 3-60SEC

ELECTROMATIC SB 165 724 INTERVAL TIMER 24VDC

ELECTROMATIC S-SYSTEM S110156724 COMBI TIMER AUTOMATIC START 20-28VDC

Electromatic S-System SA 205 220 Delay on Operate 220V AC 0.8-18 SEC SA205220

Electromatic S-System SA 205 230 Supply 230V AC Delay On Operate SA205230

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ELECTROMATIC S-SYSTEM SA105220 DELAY ON OPERATE 220VAC

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ELECTROMATIC S-SYSTEM SC210120 ONE SHOT 0.5SEC 120VAC