IC693PTM101
通信卡硬件設(shè)計
圖2所示為嵌入ZIGBEE模塊的EPA閥門定位器通信卡系統(tǒng)框圖，主要包括處理器單元（C805IFl20）、SDRAM（靜態(tài)存儲器）、RESET及時鐘電路、以太網(wǎng)控制電路、ZIGBEE模塊及總線以太網(wǎng)供電模塊。
圖2嵌入ZIGBEE模塊的EPA閥門定位器通信卡系統(tǒng)框圖
以太網(wǎng)控制器采用臺灣Realtek公司RTL8019AS芯片、執(zhí)行基于IEEE802.3u局域網(wǎng)標(biāo)準(zhǔn)的10Mb/s和100Mb/s以太網(wǎng)控制功能，其地址總線與數(shù)據(jù)總線分別與CPU的地址/數(shù)據(jù)總線相連。按數(shù)據(jù)鏈路的不同，可以將RTL8019AS內(nèi)部劃分為遠(yuǎn)程DMA通道和本地DMA通道兩個部分，本地DMA完成控制器與網(wǎng)線的數(shù)據(jù)交換，主處理器收發(fā)數(shù)據(jù)只需對遠(yuǎn)程DMA操作，當(dāng)主處理器要向上發(fā)送數(shù)據(jù)時，先將一幀數(shù)據(jù)通過遠(yuǎn)程DMA通道送到RTL8019AS中的發(fā)送緩沖去，然后發(fā)送傳送命令。
ZIGBEE模塊零用的是北京赫立訊公司的IP_Link1270，完成與手持設(shè)備無線通信。這是一款完全符合IEEES02.15.4標(biāo)準(zhǔn)與ZIGBEE規(guī)范的2.4GHz無線收發(fā)模塊，編碼方式是DSSS，調(diào)制方式為O_QPSK，數(shù)據(jù)速率為250kb/s，發(fā)射功率為-16.6~3.6dBm，傳輸距離可達(dá)到200m。
通信卡系統(tǒng)采用基于以太網(wǎng)的總線供電方式，連接到現(xiàn)場設(shè)備的線纜不僅能夠傳送數(shù)據(jù)信號，還要能夠為現(xiàn)場設(shè)備提供電源？偩供電采用調(diào)制解調(diào)法，在以太網(wǎng)集線器或交換機(jī)的以太網(wǎng)信號輸出端，將24~48V直流電源信號與以太網(wǎng)通信信號調(diào)制在一起，在現(xiàn)場設(shè)備端的以太網(wǎng)信號輸入端，再將直流電源與以太網(wǎng)通信信號進(jìn)行分離，把其中的24~48V直流電源通過Dc—Dc轉(zhuǎn)換為現(xiàn)場設(shè)備用的直流工作電源，從而實現(xiàn)基于以太網(wǎng)的總線供電。
IC693PTM101 Nortel AL1001a05-e5 BayStack 5520-48 Switch - New
Nortel Norstar CICS 4x16 System w/ CallPilot 100 Voicem
Nortel Business Phone System Package #5 w/ 1yr Warranty
Nortel 8648GTR DS1404092-E5 Passport L3 Routing Sw Mod
NORTEL BCM VOICE MESSAGING 32-SEAT SOFTWARE AUTH. CODE
NORTEL NTN445EJ , DWDM Interface Band Card
Nortel NTPB10AA 11 Port Multiservice Wireless Processor
Nortel BCM400 4.0 BCM 400 R4 R4.0 64 vm MCDN 8 Voipgy
Nortel BCM400 4.0 BCM 400 R4.0 R4 1000vm dual PS/HD
Nortel BCM400 4.0 BCM 400 R4.0 R4 ICC 32 LanCte 16 um
Nortel BCM1000 R4 1000vm & BCM450 Migration Keycode
Nortel Shasta 5000 Subscriber Service Card NTJT29BB 06
NORTEL Passport 15000 WPDS FP Module NTNQ64AA 19
Nortel BCM400 4.0 BCM 400 R4.0 R4 80vm 4voipgway MCDN
NORTEL CP Module PN: NTPB11AA 08
Nortel 8324FX 24 port Expansion Module DS1404098-E5 NEW
NORTEL DDU PLUG-IN MODULE ASSEMBLY I/O CONTROL NTFX32BA
NORTEL MERIDIAN PHONES M2008 M2616 M2006
Nortel Networks XLR1202SX 1000SX BayNetworks XLR1202SX
Nortel Alteon 2424-SSL EB1412006 316011-A GF
Nortel WLAN Security Switch 2380 switch DR4001E71E5
Agilestar - AA1403003-E5 - For Nortel - New in Box
Nortel Hardware NTVQ01BBE5 Voice Gateway Media Card
NORTEL NTRX51GZ DMS-100 NGC3X0JEAA
Nortel 8668 DS1404068 Metro Ethernet Services Module
Nortel Passport 8310 2x 8393SF Ethernet Routing Switch
New Nortel Passport 1624G Routing Switch DJ1412A04
NORTEL NTRX51GZ DMS-100
Nortel 2 Ports 10 Gigabit Module for 1880S ESU1880S
nortel 32R1859 Nortel Networks Layer 2-7 GBE
Nortel Alteon Firewall Accelerator 5700 EB1639035
NEW BES-210-48T Nortel Ethernet Switch 48 10/100
Nortel BCM400 BCM 400 4.0 Base System NT7B10AAFV
IBM 39Y9267 Nortel 10 Gb Ethernet Switch Module for IBM
Nortel Business Phone System Package #8 w/ 1yr Warranty
Nortel Call Pilot 150 Enhanced Call Center Key Code
ARRIS / Nortel CMTS 1000 (1x8) Docsis/Eurodocsis 1.0 A+
Nortel WLAN SECURITY SWITCH 2360
NORTEL SWTICH 4526GTX-24 ETHERNET AL4500E06E6
(Avaya) Nortel Passport 8692SF Switch DS1404065-E5
NORTEL NTHW08CG MSS 15000 Control Processor CP3 Module
New Nortel Arris 1000 CMTS Docsis/Eurodocsis 1.0
Nortel/Avaya Call Pilot Release 5.0 8 Channels 370 MB
Nortel/Avaya OPT11C Release 4.0t Succession NACCS
Nortel DS1402002 8006 6 SLOT Nortel Switch
30 Nortel I2004 NTDU82BA NTDU82 Icon Keys w PC PORT PS
Office Phone System Nortel Norstar CICS w/ 16 T7316 VM
Nortel BCM 50 Package#3
20 Nortel I2004 Poe IP Phone Charcoal Bezel NTDU92 Ref
40 Nortel Norstar T7316 Phone NT8B27AAAA Charcoal Ref
Nortel AL1001e03-e5 BayStack 5510-48 routing switch new
NORTEL CP Module PN: NTHW08BA 85
NORTEL CP Module PN: NTPB10AA 08
NORTEL CP Module PN: NTPB10AA 19
NORTEL CP Module PN: NTPB10AA 02
Nortel Optera NTCA04GP WMR3FZ0AAE OC-192 STM-64 XR 1535
Nortel Business Phone System Package #6 w/ 1yr Warranty
Nortel NT8E01QW OC-48 STM-16 Enhanced Ring 1557nm AR TX
NORTEL APPLICATION GATEWAY 1000 - NTDU27AB.
1 Nortel BCM50 r5 BCM 50 5.0 r5.0 12x48 50vm
Nortel Original AA1403006-E5 XFP GBIC Transceiver 10G
Nortel Option 11c System LOADED w/Callpilot 703t Server
NORTEL 8648GTR 48 PORT GIG SWITCH MODULE DS1404092-E5
Nortel, AL1016001 ERS 5XXX ADV RTG LIC SUPPLY ONE PER..
NORTEL SWITCH BAYSTACK 460-24T-PWR AL2001E20E5
Nortel Networks Alteon Firewall Accelerator 5700 Switch
NORTEL NTHW18BF 6mPKTservSP function processor
Nortel BCM 400 Voice Messaging 64 Seat KeyCode NTKC0015
Nortel BCM 400 VoIP Gateway 16 Trunk Key Code NTKC0062
Nortel BCM 400 4.0 System Standard (NT7B10AAFV)
Nortel Passport 8683POS DS1404016 3-Slot MDA Baseboard
NORTEL DS1404035 NORTEL PASSPORT 8648 TXE MD
DATA EDGE PRODUCT AL4500E15-E6-Nortel 4524GT Ethernet R
NORTEL AL1001E03 Nortel AL1001E03 BayStack 5510 Stackab
Nortel BCM 50 Package# 2
NORTEL DESKTOP MSG 50 SEAT LICENSE OPTION AUTH. CODE
Nortel NT0H03BD Optical Metro 5000 OCLD 2.5G Flex B2
IC693PTM101
在線咨詢 
