描述

PLC通信主要采用串行異步通信，其常用的串行通信接口標準有RS-232C、RS-422A和RS-485等。

1．RS-232C

RS-232C是美國電子工業(yè)協(xié)會EIA于1969年公布的通信協(xié)議，它的全稱是“數(shù)據(jù)終端設備（DTE）和數(shù)據(jù)通信設備（DCE）之間串行二進制數(shù)據(jù)交換接口技術標準”。RS-232C接口標準是目前計算機和PLC中最常用的一種串行通信接口。

RS-232C采用負邏輯，用-5～-15V表示邏輯“l(fā)”，用+5～+15V表示邏輯“0”。噪聲容限為2V，即要求接收器能識別低至+3V的信號作為邏輯“0”，高到-3V的信號作為邏輯“1”。RS-232C只能進行一對一的通信，RS-232C可使用9針或25針的D型連接器，表1列出了RS-232C接口各引腳信號的定義以及9針與25針引腳的對應關系。PLC一般使用9針的連接器

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主營：世界知名品牌的PLC、DCS系統(tǒng)備件模塊

①Allen-Bradley(美國AB)系列產(chǎn)品》

②Schneider(施耐德電氣)系列產(chǎn)品》

③General electric(通用電氣)系列產(chǎn)品》

④Westinghouse（美國西屋）系列產(chǎn)品》

⑤SIEMENS(西門子系列產(chǎn)品)》

⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。

⑦estinghouse（西屋）：OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。

⑧Invensys Foxboro（?？怂共_）：I/A Series系統(tǒng)，F(xiàn)BM（現(xiàn)場輸入/輸出模塊）

順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號處理、數(shù)

據(jù)通信及處理等。Invensys Triconex:冗余容錯控制系統(tǒng)、基于三重模件冗余（TMR）

結構的zui現(xiàn)代化的容錯控制器。

⑨Siemens(西門子)：Siemens MOORE，Siemens Simatic C1，Siemens數(shù)控系統(tǒng)等。

⑩Bosch Rexroth（博世力士樂）：Indramat，I/O模塊,PLC控制器,驅(qū)動模塊等。

◆Motorola（摩托羅拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。

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ADDA 12VDC Brushless Blower Fan AB5012MB-C03

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Alcatel SERV 3DB02155AA

Alcatel OC3C/STM1C IR I/O CARD Refurbished

Alcatel MD128W1 3DB02136AA

Alcatel SWL-B LHR R2.0 FEE License Certificate

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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

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LINCOLN 82050 Barrel Grease Pump NEW

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HP COMPAQ 416039-001 405963-001 NC6200 NC6300 KEYBOARD

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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=

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

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

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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

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TAMAGAWA TBL-I SERIES AC SERVO MOTOR TS4502N2000E100

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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

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