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目前常用的系統(tǒng)主要是SIEMENS 的S7和ABB的Freelance2000,其中使用的現(xiàn)場(chǎng)總線是PROFIBUS。
11、表述網(wǎng)絡(luò)傳輸速度的單位是什么?
表述網(wǎng)絡(luò)傳輸速度一般以波特率(Bps)為單位,其含義是每秒鐘傳輸?shù)亩M(jìn)制數(shù)的位數(shù)。不同的網(wǎng)絡(luò)一般波特率不同,相同的網(wǎng)絡(luò)采用不同的網(wǎng)絡(luò)電纜也可以達(dá)到不同的特率。例如:PROFIBUS現(xiàn)場(chǎng)總線在以雙絞線作為網(wǎng)絡(luò)電纜時(shí)通訊速度為1.5KBps,采用光纜時(shí)可以12MBps。采用普通雙絞線的以太網(wǎng)傳輸速度為10MBps,采用光纜時(shí)可以達(dá)到100MBps。另外,傳輸距離的長(zhǎng)短會(huì)影響傳輸速度,一般來(lái)說(shuō),距離越長(zhǎng),速度越慢。
Allen-Bradley 廈門(mén)泰尼電氣有限公司
Schneider 聯(lián)系人:劉上金(銷(xiāo)售代表)
Triconex 手機(jī):18450283797
FOXBORO 固定電話:0592-3687797
ABB QQ:2762305095
SIEMENS 郵箱:2762305095@qq.c o m
MOTOROLA 傳真:0592-6890859
XYCOM 網(wǎng)址:www.xmtaini.c o m
Ovation 地址:廈門(mén)海滄街道濱湖一里7號(hào)
Rexroth Indramat 郵編:361026
RELIANCE ELECTRIC 0574111A USPP 0574111A
RELIANCE ELECTRIC 0-57411-2 USPP 0574112
RELIANCE ELECTRIC 0-57411-2D USPP 0574112D
RELIANCE ELECTRIC 0-57411-2E USPP 0574112E
RELIANCE ELECTRIC 0-57411-2F USPP 0574112F
Reliance Electric Register Input 45C380
Reliance Electric 0-52837 PC BOARD ACCA Module NEW NNB!
RELIANCE ELECTRIC 0-49009-1 USPP 0490091
Reliance Electric AC VS Drive GP-2000 2GC41015 16 HP
RELIANCE ELECTRIC 0-54363 USPP 054363
Reliance Electric Duty Master P18G3396D NEW __Rk202
Reliance Electric Duty Master Unibrake A51A0327P-UM _M
Reliance Electric Duty Master Unibrake A51A0627 HC __*A
RELIANCE ELECTRIC 69089-5A USPP 690895A
RELIANCE ELECTRIC 1AC4102G USPP 1AC4102G
RELIANCE ELECTRIC 0-49005-1 NSFP 0490051
RELIANCE ELECTRIC 1AC4102 USPP 1AC4102
RELIANCE ELECTRIC 0-51446 NSPP 051446
RELIANCE ELECTRIC 0-51829-2 NSFP 0518292
RELIANCE ELECTRIC 0-56313-1 USPP 0563131
RELIANCE ELECTRIC 1AC2001U USPP 1AC2001U
RELIANCE ELECTRIC 5RA0200 USPP 5RA0200
RELIANCE ELECTRIC 5RA0400 USPP 5RA0400
RELIANCE ELECTRIC 0-55325-24 NSPP 05532524
RELIANCE ELECTRIC 404745-D USPP 404745D
RELIANCE ELECTRIC 78092-8R USPP 780928R
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