描述
采用一個(gè)低效能MCU
簡(jiǎn)易基于定時(shí)器的外部看門(mén)狗可在相對(duì)低成本的狀況下監(jiān)控心跳，但這會(huì)嚴(yán)重限制看門(mén)狗系統(tǒng)的能力和恢復(fù)的可能性。其實(shí)，低效能微控制器就可以做為外部看門(mén)狗的定時(shí)器，所以何不為看門(mén)狗增添一些智能且采用微控制器呢？微控制器的固件(Firm ware)可被開(kāi)發(fā)用來(lái)滿足增加許多功能的心跳監(jiān)測(cè)窗口所需。
一個(gè)“聰明”的看門(mén)狗有時(shí)被稱(chēng)為監(jiān)督者或安全看門(mén)狗，且已在不同的產(chǎn)業(yè)，如汽車(chē)領(lǐng)域?qū)嶋H使用了許多年；另外，通?；谖⒖刂破鞯目撮T(mén)狗以被主要用于安全關(guān)鍵應(yīng)用。目前開(kāi)發(fā)工具已相當(dāng)可用且硬件成本也低，這樣的設(shè)計(jì)具成本效益，且在其他的應(yīng)用中亦是如此。
主營(yíng)：世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國(guó)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(guó)西屋）系列產(chǎn)品》
⑤SIEMENS(西門(mén)子系列產(chǎn)品)》
⑥銷(xiāo)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（福克斯波羅）：I/A Series系統(tǒng)，F(xiàn)BM（現(xiàn)場(chǎng)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(hào)處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余（TMR）
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
⑨Siemens(西門(mén)子)：Siemens MOORE，Siemens Simatic C1，Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth（博世力士樂(lè)）：Indramat，I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
◆Motorola（摩托羅拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。
Square D FCL34100 Circuit Breaker 100 Amp 3 Pole New
Thermo Electron Corp 105ECA-115 Power Supply EC105 New
Yaskawa CIMR-VU4A0002JA?A Speed VFD Drive CIMRVU4A0002JA
GE AC0O1 44A719336G01 AC Output Driver 44A719336-G01
Gai-Tronics 701-902 Smart Handset/Speaker Amplifier New
Siemens 6ES7 131-4BD01-0AA0 Input Module Qty 5
Banner MSCD-2T3-69016 Mini-Screen Control Box New
Texas Instruments 500-2109 Base Controller 5002109 New
GE TED134150 Circuit Breaker 150AMP 3P 480 VAC 250 VDC
Sensormatic Ultralink CBC-4020 Alarm Management Unit
Edwards Adaptahorn 879DEX-G1 Horn 24VDC 879DEXG1 New
Toshiba VFA7-2075PL (8A) Inverter Drive VFA72075PL New
XP Power 101152-01 AC to DC Power Supply F8B6D4A3G3 New
Samsung BP94-02258F ASSY PCB Main HLS6767 L66 New
ABB 2600T 264D Safety Pressure Transmitter Kit New
Giddings & Lewis 502-02734-50 I/O Logic 5020273450
Fagor MKT-27 Linear Encoder MKT27 New
SORTIES NUM FC-200577/D OUTPUT CARD FC-200577D NIB
SANYO SAN DRIVER PDT-A12-20 PDT-A- 12F -20 New
TAIYO TNA1-IF50 AC SERVO NUTRUNNER SYSTEM New
Bosch Rexroth R900979888 VT-VRPA2-2-10/V?0/T5 Amp Card
Foxboro 873PH-AIXFGZ PH/ORP Analyzer 873PHAIXFGZ New
TAC MNB-1000-15 I/O Bacnet Module MNB100015 T.A.C. New
Honeywell VA301D2C0MB-NET?-0 Gaspoint2 Gas Transmitter
Signet Scientific MK584 Powered Flow Meter MK-584 New
AO Smith 9004618005 Ignition Control Board A.O. New
Reliance 0-56313-1 Process Controller 0563131 New
Astec MP8-2N-2R-1N-1W?-01 Power Supply 73-580-5015
Bosch Rexroth R900979885 VT-VRPA2-1-10/V?0/T5 Amp Card
Square D SY/MAX 8030 RIM101 X 16 Input Module New
BLH 5510 Transducer Amplifier Card New
Moore 50DP3116EBBXB Transmitter B/M M20498-002 KYNAR
Foxboro 823DP-I3S1NL2 Electronic Transmitter New
Krauss Maffei TE500 Control Board TE-500 5089390 New
Siemens PSX-12 Power Supply Extender 500-034120 New
LiftMaster LA400-CONT 24VDC Controller Lift Master New
Symbol PDT6100 PDT6146-Z7S63HU?S Barcode Scanner
Texas Instruments 500-5031 32 Output Module 5005031 New
Siemens HQJ23B150H Circuit Breaker 150A 3 Poles New
Fisher DH7201X1-A1 39A2990X092-13 Communication Card
Endress + Hauser 50066894 Flowtec Module 30 FM 50066553
Allen Bradley 808-G1 Zero Speed Switch 808G1
Reliance Electric 0-51831-1 CVTB Module 0518311 New
PTI Controls 50387 Modulator Logic Control Board
Giddings & Lewis 502-03428-10 Comm Board 5020342810
Allen Bradley 1771-M3 Servo Control Module 1771M3 Used
Siemens 3RK1300-0ES01-0?AA0 Profibus Starter EM 300 DS
Fanuc A16B-1600-0160 Power Supply A16B16000160 New
Aiphone AX-DV Vandal Resistant Video Door Station New
Endress + Hauser 50059318 Control Board 50070511 New
Marposs 8491410201 E49 Controller New
Honeywell 30731737-006 Analog Display 30731737006 New
Endress + Hauser 50038843 Control Board New
Ronan X87-400-HS Process Card X87400HS R22 77186 New
Schafer Elektronik GMBH C520-25 Power Supply C52025 New
Marposs 6316240300 A/D Converter New
Foxboro L0118VX-E Control Board Used
Foxboro L0113DB-C Control Board Used
Foxboro L0113DB-A Control Board Used
ABB 751010R0815 Control Board Power Supply New
Reliance Electric 0-49003 Pre Amplifier Cardpak 049003
銷(xiāo)售熱線：18150087953