Com port signal 幾遠?

com port signal 最長幾遠?
&有冇repeater?
唔該有冇人知

50feet.

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咁有冇repeater or signal capture device 等等

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我用過 rs232 卅尺 D 訊號已經唔多得

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原帖由 matfu 於 2009-3-8 21:35 發表
com port signal 最長幾遠?
&有冇repeater?
唔該有冇人知


頭尾加converter轉RS-422/RS-485吧,不過記住個oonverter係要畀電的。之間的線段要兩芯/四芯的就可以了。Converter 深水埗會搵到。

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我老闆反而話485唔穩陣要轉做232 wor
成10層樓遠

[ 本帖最後由 C-Leung 於 2009-3-9 10:45 編輯 ]

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rs485 is a half duplex bus, it is difficult to control. rs422 is a full duplex bus. it can be use to extend the length of rs232 signal to 1km.

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原帖由 C-Leung 於 2009-3-9 10:44 發表
我老闆反而話485唔穩陣要轉做232 wor
成10層樓遠


咁只有祝你好運,God bless you。

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原帖由 hk4891 於 2009-3-9 11:00 發表
rs485 is a half duplex bus, it is difficult to control. rs422 is a full duplex bus. it can be use to extend the length of rs232 signal to 1km.

Thank You,講真有乜分別己經唔多記得嘞,小弟只係幾年前接觸一吓咁大把。

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唔該各位回答
咁想問rs422converter around幾$?
422 cord=com cord or other?
converted output signal=232?
google 過rs422可以upto 1-to-10 parallel
Aims:
我要capture 5 個 clients 既 signals
Solution:
咁係未1條422駁5個 clients
再422-to-232 去個capture device 度

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