485接口问题

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 楼主| JYJ_BIG 发表于 2011-7-6 09:44 | 显示全部楼层 |阅读模式
各位高手,小弟刚接触458,请问使用SN65LBC184还需要防雷电路吗?距离10米以内速度9600,不使用隔离电源问题大不大,谢谢
yzzly 发表于 2011-7-6 10:49 | 显示全部楼层
用个压敏电阻,每个设备的AB线串一个20欧的电阻
512365098 发表于 2011-7-6 22:28 | 显示全部楼层
采不采用保护和隔离措施,要看你的应用环境了,你说距离10米以内,看来应该没有什么问题,如果这10米的环境不是恶劣的话。
 楼主| JYJ_BIG 发表于 2011-7-7 10:42 | 显示全部楼层
噢,设备与伺服电机很近,走线时可能不容易分开
chunyang 发表于 2011-7-7 13:45 | 显示全部楼层
10米以内无所谓什么防不防雷,是否需要隔离则要看现场情况,多数情况下如此短距是不需要的。
512365098 发表于 2011-7-7 23:41 | 显示全部楼层
看到没,chunyang老师都这么说了,采纳吧,呵呵
 楼主| JYJ_BIG 发表于 2011-7-14 08:24 | 显示全部楼层
谢谢chunyang老师
jinmuyuharry 发表于 2011-7-14 11:19 | 显示全部楼层
Jinmuyu Electronics Co., Ltd--founded in 2003, is a hi-tech company specializing in the development, manufacture, marketing of IC cards (including contactless IC card, RFID, Mifare plus, ID card, CPU card etc.) for reader/writer. The reader supports series IC cards according to ISO14443A, ISO14443B, ISO15693 and ISO7816; various contactless IC card under international standard; especially the contactless CPU cards under ISO14443-4. Meanwhile the reader is available to pass EMV2000 and PBOC 2.0 and be authenticated by many laboratorial certifications---Visa Wave & Pay Pass (by FIME) and the Bank Card Test Center. We can also provide OEM products which are followed customers’ needs. We are powerful in the core technology and absolutely own the product property rights.


Company: Jinmuyu Electronics Co., Ltd
Addr: Room 132, Building 16, Tianqiaowan, Xinhua Beilu, Tong Zhou District, Beijing
Zip Code: 101101
Tel: +86 010 69559637
Fax: +86 010 80883677
Contact:Mr. Yang
Website: www.jinmuyu.com
E-mail: sales@jinmuyu.com; jinmuyu@vip.sina.com
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