描述

起動、保持和停止電路（簡稱起保停電路）在梯形圖中得到了廣泛的應(yīng)用，現(xiàn)在將它重畫在圖1中。圖中的起動信號X1和停止信號X2（例如起動按鈕和停止按鈕提供的信號）持續(xù)為ON的時(shí)間一般都很短，這種信號稱為短信號，起保停電路最主要的特點(diǎn)是具有“記憶”功能，當(dāng)起動信號X1變?yōu)镺N時(shí)，（波形圖中用高電平表示），X1的常開觸點(diǎn)接通，如果這時(shí)X2為OFF，X2的常閉觸點(diǎn)接通，Y1的線圈“通電”，它的常開觸點(diǎn)同時(shí)接通。放開起動按鈕，X1變?yōu)镺FF（用低電平表示），其常開觸點(diǎn)斷開，“能流”經(jīng)Y1的常開觸點(diǎn)和X2的常閉觸點(diǎn)流過Y1的線圖，Y1仍為ON，這就是所謂的“自鎖”或“自保持”功能。當(dāng)X2為ON時(shí)，它的常閉觸點(diǎn)斷開，停止條件滿足，使Y1的線圈“斷電”，其常開觸點(diǎn)斷開。以后即使放開停止按鈕，X2的常閉觸點(diǎn)恢復(fù)接通狀態(tài)，Y1的線圈仍然“斷電”。這種功能也可以用SET（置位）和RST（復(fù)位）指令來實(shí)現(xiàn)

歐美品牌停產(chǎn)的，常用的“PLC”備品備件

我司產(chǎn)品應(yīng)用于以下領(lǐng)域：

1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》

2,《智能平鋼化爐系統(tǒng)制造》

3,《PLC可編程輸送控制系統(tǒng)》

4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》

6,《化工廠藥液恒流量計(jì)算機(jī)控制系統(tǒng)》

7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列

本特利，英維思，伍德沃德，?？怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂，ACSO，力士樂等各大品牌的DCS系統(tǒng)配件，機(jī)器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

AD-8118A JOURNAL PRINTER USED SPARE

ADDA 12VDC Brushless Blower Fan AB5012MB-C03

Lot 33 TYCO1658629-1 SFP CAGE Connector 2X4 PRESS FIT

Alcatel SERV 3DB02155AA

Alcatel OC3C/STM1C IR I/O CARD Refurbished

Alcatel MD128W1 3DB02136AA

Alcatel SWL-B LHR R2.0 FEE License Certificate

Lot of 10 SANDVIK inserts 340.009 240 N134 R535 08B/864

LOGICODE MT-LC-D960C Communication Unit Cradle NEW

Lot of 10 lbs ALLFAST RIVET SOLID AF1049W1C6C6 Boeing

Alcatel 3AL97690AA LC-ESC board NEW

Vision Multiswitch V5-508 new

Fuji Electric DC-02121 DDC TR285698 Control Board NEW

Fuji Electric Pulse Amplifier TR284228 New

Fuji Electric Pulse Transmitter TR490533C TR284654A New

NOKIA D50e ATM LINK INTF CARD eSTM1LS E35478.01 New

IP05 IP ENGINE ipanema xx-256-CF512-2-?X-G4

GE Energy Power module 151X1225EK01PC0?3 230V TO 12V NEW

HoneyWell C7061F2001 Purple Peeper Flame Detector C7061

IRIS Model P522 P522AC Flame Monitor Signal Processor

HLOS CL-7000 Electrical Screwdriver&CLT-150 power NEW

lot 520 iKANOS Fusiv IKF68331-A1-PB1?-C chips$4/each

ABB 3BSE040360R41 Compact Control Builder CD license

CG171A-T003-05 Reflector Film UX188 etching mould USED

HoneyWell C7012A 1202 Purple Peeper UV Flame Detector

Mitsubishi Melsec FX1N-14MR-001 PLC Logic Controller

Yamatake azbil R4780B R4780B1003 Protector Relay NEW

Agilent Brass 5080-8750 5180-4121 5180-4160 8710-1709

Lot 13 pcs QLOGIC ISP2322 chips PN:2405448$12/pc New

LINCOLN 82050 Barrel Grease Pump NEW

keofitt M4 Valve Body type T 400001 New in Box

HP COMPAQ 416039-001 405963-001 NC6200 NC6300 KEYBOARD

SAMSUNG A-PRO Power Supply APP-1373V NEW

MACTek VIATOR Bluetooth Interface Model 010041 New

HITECH HMI PWS6500-S Touch Screen New Surplus

SIMATIC BOX PC 820 6ES7647-3DC00-0?DX0 USED

Cisco Unified Communications Manager CM6.1U4-K9-UPG=

WENDT Cutter Grinding DIA Blade L16A.000.048 NEW in box

Lot 520 JST Connectors S7B-PH-K(T)New in box S7B-PH-K

Turck BANNER IM35-11EX-HI/24?VDC Analog Data Transmitter

Turck BANNER IM35-22EX-HI/24?VDC Analog Data Transmitter

Star Diagnosis SDconnect DCDI D3 Multiplexer USED

Alcatel 3BA23197BA CPU6 Board 40G 128M New

Alcatel 3BA23241AA GPA2 Board New

DILM7-01 24VDC Contactor Moeller Electric NEW

MOELLER EMT6-KDB Thermistor overload relay

MKS Baratron 220DD Differential Capacitance Manometer

STI RELAY FGR22-24 44532-3010 FGR22 24VDC 2NO+2NC NEW

PACKETEER Fiber Bypass Switch FSW-MMF

PACKETEER SFP Transceivers GXVR-SX G10–1201-1001

ABB Motor M3AA200MLA 4/8 3GAA208207-BDC 220KG NEWinbox

ABB Motor M2AA180M 3GAA182111-BDA 118KG NEWinbox

TAMAGAWA TBL-I SERIES AC SERVO MOTOR TS4502N2000E100

IFM IG5842 IGA4008-CPKG/US?-100-DPA New

IFM IGT206 IGB3008BBPKG/M/?V4A New

IFM IIS206 IIKC015BASKG/M/?US-104-DRS New

IFM KD5022 KD-3060-BPKG/NI New

IFM IM0011 IME2015BFBOA New

IFM E20421 FIBEROPTIK INFRA-SENSOR New

IFM E30060 WELDING ADAPT New

IFM IW5058 IW-3008-BPKG New

IFM IF9920 IFB2002-ARKG/0,?80M/US New

IFM IS5031 IS-3003-BPOG New

Altivar IMC Drive controller HMI VX4A61101Y ATV61 160KW

Lot 125 Johnson Electric BI03007 13V washer pump Motors

Altistart 48 HMI module from ATS48C25Q

Altistart 48 controller board from ATS48C25Q

SEMIKRON SEMIPACK 5 SKKT 500/14 E SKKT50014E used

OERLIKON TIBOR33 Submerged Arc Welding Wires 4.0mm 25kg

Octel 250 Power 014-1050-003 Power-One SP630 350W

MAN B&W PMI SYSTEM Pressure Analyzer for 6S50MC-C

BOSCH EV6 Fuel Injector 0280155794 for Peugeot 206

RAYTHEON Modulation and Monitoring PEC 808415/001/006

Lot of 7 Novartis CSOM230B2305 Amendment#2 Kit A

Lot of 10 Novartis CSOM230B2305 Amendment#2 Kit B

Wonderware InTouch Development 1000 Tag FS2000/9.0 New

Wonderware InTouch Runtime 500 Tag FS2000/9.0 New

Lot 10 Novartis CSOM230B2305 Amendment#2 Kit D 2010-MAR

Wonderware SuiteVoyager 2.0 Client Access License

Lot 10 Novartis CSOM230B2305 Amendment#2 Kit I 2010-MAR

Lot Novartis CSOM230B2305 Amendment#2 Kit C H G F

8e6 Internet Filter IR security Server NEW