參數(shù)資料
型號(hào)： RS-422
廠商： Electronic Theatre Controls, Inc.
英文描述： RS-422 AND RS-485 APPLICATION NOTE
中文描述： RS - 422和RS - 485接口應(yīng)用筆記
文件頁(yè)數(shù)： 21/44頁(yè)
文件大?。?/td> 628K
代理商： RS-422
18
RS-422/485 Application Note
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 434-7094
Figure 2.4 Transceiver with Bias Resistors
Example 1. 10 node, RS-485 network with two 120
termination
resistors
Each RS-485 node has a load impedance of 12K
. 10 nodes in parallel
give a load of 1200
. Additionally, the two 120
termination resistors
result in another 60
load, for a total load of 57
. Clearly the termination
resistors are responsible for a majority of the loading. In order to maintain at
least 200mV between the B and A line, we need a bias current of 3.5 mA to
flow through the load. To create this bias from a 5V supply a total series
resistance of 1428
or less is required. Subtract the 57
that is already
part of the load, and we are left with 1371
. Placing half of this value as a
pullup to 5V and half as a pulldown to ground gives a maximum bias resistor
value of 685
for each of the two biasing resistors.
Bias Resistor
Bias Resistor
相關(guān)PDF資料
PDF描述
RS-485 RS-422 AND RS-485 APPLICATION NOTE
RS-MK-X2010 High Integrity FM Transceiver
RS3FS SDR Cable Assembly; Connector Type A:micro D Ribbon Plug; Connector Type B:micro D Ribbon Plug; Cable Length:2m; No. of Contacts:26; Pitch Spacing:0.8mm RoHS Compliant: Yes
RS3FS Damper Diodes (For TV)
RS4FS SDR Cable Assembly; Connector Type A:micro D Ribbon Plug; Connector Type B:micro D Ribbon Plug; Cable Length:5m; No. of Contacts:26; Pitch Spacing:0.8mm RoHS Compliant: Yes
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RS422-GE1 制造商:Carlo Gavazzi 功能描述:CABLE FOR GE90
RS422-MI1 制造商:Carlo Gavazzi 功能描述:CABLE FOR MITS MASTER
RS422-MI2 制造商:Carlo Gavazzi 功能描述:CABLE FOR MITS MASTER
RS422-MI3 制造商:Carlo Gavazzi 功能描述:CABLE FOR MITS MASTER
RS422-OM2 制造商:Carlo Gavazzi 功能描述:CABLE FOR OMRON MASTER
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*