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參數(shù)資料
| 型號： | RS-485 |
| 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 |
| 文件頁數(shù)： | 39/44頁 |
| 文件大小： | 628K |
| 代理商： | RS-485 |
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36
RS-422/485 Application Note
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 434-7094
Chapter 6: Selecting RS-485 Devices
When purchasing devices for an RS-485 system many pitfalls can be
avoided by determining the device’s communications characteristics before the
system design is complete. Knowing what questions to ask up front can save a
lot of troubleshooting in the field. The following device characteristics are all
things that should be answered in the system design stage.
1.
Is the device configured for two wire or four wire systems
2.
Is a signal ground connection available
3.
Is the device isolated Does it contain surge suppression
4.
What value bias resistors (if any) are used in the device Are they
accessible for modification
5.
Is the device terminated Is it accessible for modification
6.
What is the device’s response time (turn around delay)
7.
What is the programmable address range of the device
8.
What baud rate, or range of baud rates, is supported
If possible it is often useful to have a schematic of the serial port of each
device in a system. The schematic can provide additional information that may
be useful in troubleshooting or repairing any problems in the data system.
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相關(guān)代理商/技術(shù)參數(shù) |
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| RS485-232 | 制造商:PR 功能描述: |
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| RS485-C1(EU) | 制造商:Equinox Technologies 功能描述:RS232/RS485 CONV (EU) |
| RS485-C1(UK) | 制造商:Equinox Technologies 功能描述:RS232/RS485 CONV (UK) |
| RS485-C1(US) | 制造商:Equinox Technologies 功能描述:RS232/RS485 CONV (US) |
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