TC-PRR021【/库存现货/】

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地 址：厦 门 市 思 明 区 湖 光 大 厦 18 楼 A 单 元

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1、PLC的基本概念

早期的可编程控制器称作可编程逻辑控制器（Programmable Logic Controller,PLC），它主要用来代替继电器实现逻辑控制。随着技术的发展，这种采用微型计算机技术的工业控制装置的功能已经大大超过了逻辑控制的范围，因此，今天这种装置称作可编程控制器，简称PC。但是为了避免与个人计算机（Personal Computer）的简称混淆，所以将可编程序控制器简称PLC。PLC自1969年美国数据设备公司（DEC）研制出现，现行美国、日本、德国的可编程序控制器质量优良，功能强大。

2、PLC的基本结构

PLC实质是一种于工业控制的计算机，其硬件结构基本上与微型计算机相同，基本构成为：

a、电源

PLC的电源在整个系统中起着十分重要的作用。如果没有一个良好的、可靠的电源系统是无法正常工作的，因此PLC的制造商对电源的设计和制造也十分重视。一般交流电压波动在+10%(+15%）范围内，可以不采取其它措施而将PLC直接连接到交流电网上去

b、中央处理单元（CPU)

中央处理单元（CPU）是PLC的控制中枢。它按照PLC系统程序赋予的功能接收并存储从编程器键入的用户程序和数据；检查电源、存储器、I/O以及警戒定时器的状态，并能诊断用户程序中的语法错误。当PLC投入运行时，首先它以扫描的方式接收现场各输入装置的状态和数据，并分别存入I/O映象区，然后从用户程序存储器中逐条读取用户程序，经过命令解释后按指令的规定执行逻辑或算数运算的结果送入I/O映象区或数据寄存器内。等所有的用户程序执行完毕之后，后将I/O映象区的各输出状态或输出寄存器内的数据传送到相应的输出装置，如此循环运行，直到停止运行。

为了进一步提高PLC的可靠性，对大型PLC还采用双CPU构成冗余系统，或采用三CPU的表决式系统。这样，即使某个CPU出现故障，整个系统仍能正常运行。

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c、存储器

存放系统软件的存储器称为系统程序存储器。

存放应用软件的存储器称为用户程序存储器。

d、输入输出接口电路

1．现场输入接口电路由光耦合电路和微机的输入接口电路，作用是PLC与现场控制的接口界面的输入通道。

2．现场输出接口电路由输出数据寄存器、选通电路和中断请求电路集成，作用PLC通过现场输出接口电路向现场的执行部件输出相应的控制信号。

e、功能模块

如计数、定位等功能模块。

f、通信模块

如以太网、RS485、Profibus-DP通讯模块等。

Dell PowerEdge 2850 2x 3.2G, 2M, Xeon 3GB men

Donaldson Carbon Filter System P/N: P196421

Donaldson Carbon Filter System P/N: P196160

Silicon Optix Image AnyPlace IA-100 Image Scaler

IBM 6180 Card P/N: 04N5884

IBM 2699 Card P/N: 04N5878

Pioneer Magnetics Power Supply Model NO. PM 2974A-3-5

IBM 2810 Card P/N: 21H5304

IBM 2682 Card P/N: 21H6573

IBM 6534 Controller Card P/N: 21H5631

IBM Cache Card 4700 P/N: 86G8149

IBM 4-Way Processor P/N: 97H6491

(28) Tayloreel 28- 16MM 13" Reel 2.5" Hub Plastic Blue

Apple Xserve Filler Tray: 620-2740-A - 805-3373

Newbridge / Alcatel Multiport Aggregate Card 90-1610-01

Cisco 700-02849-01 Blank Slot Plate Cover 800-03191-01

Cisco CNP6160AAB Modules 73-8301-05

Cisco Power Supply DS-CAC-845W

Cisco 10-1821-01 2Gbps GBIC Transceiver

Tasman Networks, Inc. 1001 Router/Network Security Devi

Sun Microsystems External SCSI Cable P/N 530-3562-01

IBM 1Gb Microdrive Option Kit P/N: 07N5574 New

NetApp Cable P/N: 112-00045 Molex P/N 739290018

NetApp Cable P/N:112-00084 Molex P/N 739290024

HP Power Supply P/N: 321632-001

HP Power Supply P/N 337867-001

Juniper Power Supply P/N: 740-002497

Videotek RS-12AESL Routing Switcher

Canare 12S1F2 12 Channel Fantail FK-37 To XLR

Sun Ultrium LTO 2 External tape drive P/N: 3800914-02

HP Power Supply SP/N 305447-001 P/N: 280127-001

Video Accessory Corporation LDVB Video Line driver

3Com TP Transceiver Isolan 1681-0

ISOLAN 1681-0 TP Transceiver

Network Associates OC3-MMF Optical Interface

RGB Spectrum RGB VideoLink 1650X

Nortel Networks MicroAnnex XL CM1009E31 New

System Sensor Multi-Alert Sounder/Strobe MASS2415ADAS

System Sensor V400 Series Sounder/Strobe PN: V4R2475ADA

System Sensor signal Strobe P/N: SS24MC

System Sensor signal Strobe P/N: SS24MB

System Sensor signal Strobe P/N: SS24M

System Sensor signal Strobe P/N: SS24LOBC

System Sensor signal Strobe P/N: SS24LOA

System Sensor ADA Signal Strobe P/N: SS2475ADAB

System Sensor ADA Signal Strobe P/N: SS2415ADAS

System Sensor ADA Signal Strobe P/N: SS2415ADAB

System Sensor ADA Signal Strobe P/N: SS2415ADA

System Sensor ADA Signal Strobe P/N: SS241575ADAS

System Sensor ADA Signal Strobe P/N: SS241575ADAB

System Sensor ADA Signal Strobe P/N: SS24110ADAB

System Sensor ADA Signal Strobe P/N: SS24110ADA

System Sensor signal Strobe P/N: SS12LO

System Sensor ADA Signal Strobe P/N: SS1215ADAB

System Sensor ADA Signal Strobe P/N: SS1215ADA

System Sensor ADA Signal Strobe P/N: SS121575ADA

System Sensor Strobe Retrofit Plate P/N: RP2415ADA

System Sensor Strobe Retrofit Plate P/N: RP241575ADA

System Sensor Strobe Retrofit Plate P/N: RP241575ADA

System Sensor Strobe Retrofit Plate P/N: RP24110ADA

System Sensor PS Series Sounder/Strobe P/N: PS2475ADA

System Sensor PS Series Sounder/Strobe PN: PS241575ADAW

System Sensor Multi-Alert Sounder/Strobe P/N: MASS24MB

System Sensor Multi-Alert Sounder/Strobe P/N: MASS24LOC

System Sensor Multi-Alert Sounder/Strobe P/N: MASS24LOB

System Sensor Multi-Alert Sounder/Strobe MASS2475ADAB

System Sensor Multi-Alert Sounder/Strobe MASS2475ADA

System Sensor Multi-Alert Sounder/Strobe MASS2415ADAB

System Sensor Multi-Alert Sounder/Strobe MASS241575ADAB

System Sensor Multi-Alert Sounder/Strobe MASS24110ADAB

System Sensor Multi-Alert Sounder/Strobe MASS24110ADAB

System Sensor Multi-Alert Sounder/Strobe MASS24110ADA

System Sensor Multi-Alert Sounder/Strobe MASS1215ADAB

System Sensor Multi-Alert Sounder/Strobe : MASS1215ADA

System Sensor Sounder/Strobe MASS1215ADA

System Sensor Multi-Alert Sounder/Strobe : MASS1215ADA

System Sensor Multi-Alert Sounder/Strobe MASS121575ADAB

System Sensor Multi-Alert Sounder/Strobe MASS121575ADA

System Sensor Multi-Alert Sounder/Strobe P/N: MAEH24MC

System Sensor Multi-Alert Sounder/Strobe P/N: MAEH24M

System Sensor Multi-Alert Sounder/Strobe MAEH241575ADAS

System Sensor Multi-Alert Sounder/Strobe MAEH241575ADA

System Sensor Multi-Alert Sounder/Strobe : MAEH24110ADA

System Sensor Multi-Alert Sounder P/N: MA12/24DB

System Sensor Horn P/N: HC12/24W

Panasonic AC Servo Motor Model MUMS082A1B

ATI FireMV 2400 PCIE 256M P/N 102A6140201

National Instruments PCI-6503 Card P/N 185183A-01

EMC 24" Power Cord 18/3 C14 To C13 P/N: 109002481

SONY Multi-Purpose AC CORD 1-751-815-11

ADC ADCPP245EB110 Cat 5e Patch Panel Rack Mount New

Nortel OSYNC Module AG2104038

Omnitron Systems iConverter Model 8240

Black Box 2-Port Serial Host Adapter Card P/N IC187C

MCK EXTender 3000 Remote Module E-3000U-REM

Cisco Centralized Forwarding Card WS-F6700-CFC

Sun Dual Fast Ethernet SCSI Card - P/N: 501-6635

IBM Power Supply P/N 74P4400 FRU P/N 74P4401

EMC CLARiiON Link Control Card (LCC) 005042859

HP ProLiant BL30p Broad Only P/N: 368271-B21

HP ProLiant BL30p 2x 3.2 Xeon 1M 1G Mem P/N: 368271-B21

RATOC Systems, Inc. REX-PCIFW1

BPS BPS-250RD Redundant Power Supply 230W

Xerox Maintenance Kit - 016-1727-00 New

Xerox Transfer Roller - 16189000 New

HP Toner cartridge - Magenta - C4151A - New

HP Toner cartridge - Black - C4149A - New

BROCADE 16 Port Blade Module 60-0002121-04

Finisar 2GB SFP 1000Base-SX GBIC FTRJ8519P1BNL-B?1

Finisar 2GB SFP 1000Base-SX GBIC FTRJ-8519-7N-2.?5

Hard Drive Caddy / Tray P/N RM21400-04A

Intel Pro 10/1000 Mt Pci-x Dual Port Adapter C49769-002

Hybricon card cage W/Backplane Pac2000 Subrack New

Adaptec AHA-2940W / 2940UW PCI SCSI Controller

Netcom Systems - SX-7410B

HP Proliant SCSI Terminater 289563-001

Parker 955AOPLP High Flow Diaphragm Valve 45700802 New

Keyence Fs2-62 Fiber Photoelectric Sensors New

Johnson Controls P74BA-1C Differential Pressure Control

malema Adjustable flow switch M-100-B112-100-?001 New

ORIEL 68805 40-200W ARC LAMP POWER SUPPLY - TESTED

HP Color LaserJet Fuser Kit 110v C4155A New

Belkin 25ft 10/100BT CAT5E Patch RJ45M/RJ45M Yellow New

Xerox Toner cartridge - - 6R00287 New

Apple Hard Drive Tray module P/N 620-1914-A

IBM Service Processor Card P/N: 80P5557

16x4 PORT RJ45 MODEM SPLITTER Model RMS41RJ45

IBM eServer P5 Power Supply P520 P/N: 97P2330

HP/Compaq Upright Computer Base 316594-001

EBM PAPST tubeaxial Fan W2G115-AG71-09

DELL 2GB PC2-3200R MEMORY P/N: DY2835

Cisco 8 MB SRAM P/N MEM-VIP250-8M-S New

Raritan P2CIM-SUN Computer Interface Module

Raritan P2CIM-SUN Computer Interface Module New

Tamura transformer wall 6vdc 900ma wall 6VDC 900MA New

Gigi / IBM 8-PORT PCI/8R ASYNC ADAPTER 50000503-01

HP Proliant Processor Memory Board P/N: 412321-001

HP D6982A SCSI Cable

Lindy MC1001TSC 1000Base-T to 1000Base-SX Multi-mode

Fan Tray - D800 60-0110001-01 TA300DC M33406-33

IBM 1GB DDR PC2100 CL2.5 ECC RAM FUR: 09N4308

Cisco 128 MB DRAM P/N MEM-VIP250-128M?-D New

Alcatel / Newbridge Cable P/N 90-2767-02

ALCATEL - 90-4716-02 - Power Tray Cable Kit 3645

Alcatel Newbridge SSU Module P/N: 90-3347-01

Lucent E1 ATM FC-IOP P/N 810-00277-10

Alcatel / NewBridge Card 90-0661-01

Alcatel / NewBridge Card 90-2153-03

Alcatel 4P OC3C/STM1C IR P/N: 90-6701-02

FUJITSU - FC9616MDA1 - FLM 600 ADM C6A-D3A2

SUN 501-5675 -06 SUN 750Mhz CPU module