描述

外擴(kuò)存儲(chǔ)設(shè)備

一個(gè)嵌入式系統(tǒng)如果有電源、晶振和CPU，那么這就是我們熟悉的最小系統(tǒng)。如果該嵌入式系統(tǒng)需要運(yùn)行大點(diǎn)的操作系統(tǒng)，那么不但需要CPU具有MMU，CPU還需要外接SDRAM和NANDFLASH。如果該cpu具有SDRAM和NANDFLASH控制器，那么在硬件設(shè)計(jì)上不用過多的考慮地址線的使用。如果沒有相關(guān)的控制器，那么需要注意地址線的使用。

這部分在LAYOUT的時(shí)候是一個(gè)重點(diǎn)，究其原因就是要使相關(guān)信號(hào)線等長以確保信號(hào)的延時(shí)相等，時(shí)鐘和DQS的差分信號(hào)線走線。在布線的時(shí)候各種布線技巧需要綜合使用，例如與cpu對(duì)稱分布，菊花鏈布線、T型布線，這都需要依據(jù)內(nèi)存的個(gè)數(shù)多少來進(jìn)行選擇，一般來說個(gè)數(shù)越多，布線越復(fù)雜，但是知道其關(guān)鍵點(diǎn)，一切迎刃而解。

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（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(dòng)模塊等。

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

WALCHEM WEBMASTER WMT700-1NNADBN COOLING TOWER CONTROL

AVTRON TRIMMER PROGRAMMER D14660 NEW OLD STOCK *LNC*

OMRON 3G2A5-LK005 LINK UNIT * XLNT CONDITION *

ABB ACH501-005-4-00?P2 FREQUENCY AC DRIVE (5 HP)

ABB (ASEA DSPC 153) 2668 180-113/5 GOOD TAKEOUT

MITSUBISHI MELSEC AX80Y80C INPUT/OUTPUT UNIT

ALLEN BRADLEY 209-DSD-010X-DN (ULTRA 3000I DRIVE)

SIEMENS CFD63B100 CIRCUIT BREAKER GOOD TAKEOUT

MAYATECH CORPORATION 464290 BRAND NEW NOT IN BOX

MAYATECH CORPORATION 811077 EDGE OF WEB SENSOR NEW

MOORE APACS 39ACM24BAN (ACM MODULE) GOOD TAKEOUT

SEIKI CNC BOARD B7909204 GOOD TAKEOUT

ALLEN BRADLEY 1336F-BRF100-AA?-EN-HAS2-LA7-L4

ALLEN BRADLEY 1326AB-B2E-11 SERVO MOTOR (REFURBISHED)

ABB ACS350-03U-09A8?-2 DRIVE (3 HP) BRAND NEW!

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LANDMARK GRAPHIC INTERFACE PANEL LMG (115 VOLT)

SPEED SELECTOR 518-100-60 (BRAND NEW) SPEC # TB

OMRON C200H-NC211 (NC UNIT) NEW OLD STOCK

MOORE APACS 39HFM2CAN (HFM MODULE) GOOD TAKEOUT

NIKKI DENSO ACTUS POWER NPSA-20NN-50E8 SERVO CONTROL

HONEYWELL BATTERY TEST CARD 30752783-001 (XLNT COND)

HONEYWELL TRANSCEIVER 30752766-001 (XLNT COND)

HONEYWELL COMMUNICATIONS LOGIC 30752787-002 (XLNT COND)

GIDDINGS & LEWIS 810-21977-01 CONTROL MODULE W/POWER..

NIKKI DENSO ACTUS POWER NPSA-GMDA-401YZ?-A2 GOOD TAKEOUT

RELIANCE ELECTRIC SP500 VS DRIVE 1SU41007 (7.5 HP)

RELIANCE ELECTRIC SP600 AC DRIVE 6SP401-008CTNN (5 HP)

RELIANCE ELECTRIC VS DRIVE 2GC41007 (7.5 HP)

SYMAX 8020SCP401 MODEL 400 PROCESSOR (REFURBISHED)

AUTOTECH CONTROLS SAC-M1051-010 (PRG LIMIT SWITCH)

YASKAWA CACR-SR15SZ1SDY?77 SERVOPACK *XLNT* CONDITION

MITSUBISHI MELSEC K0J2-E56DS SEQUENCE CONTROLLER (NEW)

SIEMENS 6AV6 545-0BC15-2AX0 TP170B COLOR TOUCH PANEL
BRAND NEW IN BOX FACTORY SEALED

STEIMEL PUMP TYP-SKL31/0AK-P (BRASS) 1 1/4 FLANGED) NEW

YOKOGAWA VORTEX FLOWMETER YEWFLO DY040 (1 1/2″) SST NEW

YASKAWA JANCD-1003E SMALL BOARD JANCD-EW02 * LNC *

GE DRIVE 6KGP43005X9XXXA?1 AF-650 GP 5 HP. 460V *XLNT*

GREYLINE INSTRUMENTS OCF-III-CR FLOW MONITOR (BRAND NEW

SIEMENS 6ES5470-4UA11 SIMATIC ANALOG MODULE

SIEMENS 6ES5924-3SA11 CPU MODULE XLNT CONDITION

ABB DSQC 266G 3HAB8801-1/2B ROBOT CONTROL BOARD NEW

FANUC A16B-1212-0270 /05A LASER INTERFACE BOARD *XLNT*

SQUARE D MAL364508041 CIRCUT BREAKER (WITH LUGS) XLNT!

JOY MODEL 33 BASE LOAD CONTROLLER NEW SURPLUS NEVER USE

SIEMENS MLFB6AT1131-8KB?00-0AA0 KEYBOARD NEW IN BOX

PARKER DIGIPLAN 8 AXIS MODULAR DC DRIVE SYSTEM TYPE-UR8

ABB 5692-435-LX ENCODER (BRAND NEW)

NSK BALL SCREW W3606-550ZX-C3Z?16 (32 INCHES) BRAND NEW

CONTRAVES VARIDYN COMPACT ADB/F440.60M (40 KVA) *XLNT*

FANUC A20B-0008-0032 /03A SPINDLE DRIVE TOP BOARD XLNT

ALLEN BRADLEY 1745-PT1 PROGRAMMER FOR SLC 100 NIB W/

ALLEN BRADLEY 1404-M405A-CNT POWERMONITOR 3000

FANUC A860-0326-T002 2500P ABS PULSE CODER GOOD TAKEOUT

YUSHIN ROBOT TEACH PENDANT PULLED FROM WORKING ROBOT

MITSUBISHI ENCODER RFH1024-22-1M-6?8 TYPE TSI508 N85 NEW

ABB AXEM DC MOTOR F9M4 57540 GOOD USED TAKEOFF!

MITSUBISHI MELSEC F2-40M-UA1 CONTROLLER NEW IN BOX

SIEMENS 6ES5 470-7LB12 ANALOG OUTPUT GOOD TAKEOUT

SIEMENS 6ES5 465-7LA11 ANALOG INPUT GOOD TAKEOUT

OKUMA E4809-045-061-D (BDC BOARD GOOD TAKEOUT)

ALLEN BRADLEY 8600 1880L (CPU BOARD) OSAI OS5001V

ALLEN BRADLEY 8600 1882FL (MEMORY MODULE) OSAI OS5241

ALLEN BRADLEY 8600 2163B (CNC BOARD) OSAI OS5330P