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參數(shù)資料
| 型號(hào)： | 232CL9R0900 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | RS-232 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | 5V的高速RS - 232收發(fā)器與0.1uF電容 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大小： | 95K |
| 代理商： | 232CL9R0900 |
232CL9R0900 – pg. 1/2
B&B Electronics - January 2000
This product designed and manufactured in USA of domestic and imported parts by
9 Pin RS-232 to Current Loop Converter
Model 232CL9R
The Model 232CL9R is a passive 9 pin RS-232 to current loop converter.
This converter requires a 12VDC-power supply at 100mA. Additional resistors are
supply for an active source.
Figure 1.
To connect the converter to an existing current loop port, you must first determine if the port is active or passive.
For a port to be active, it must have an internal power supply which provides the 20mA current for the transmitter,
receiver, or for both. This information should be available in the instruction manual. If the instruction manual is not
available the simplest way to determine this is to break the loop (disconnect it) and see if there is any DC voltage across
the output or input pairs.
Current loop interfaces normally consist of four wires. They are usually labeled T+, T-, R+, and R-. T+ and T- are
the transmit plus and transmit minus lines and data is output from that device on those lines. The R+ and R- lines are the
receive plus and receive minus lines and data is input into that device on these lines.
Interconnection of the two current loop devices is different depending on whether your unit is active or passive.
Connection to an active current loop port is very simple. Your unit’s T+ and T- lines go to the B&B unit’s R+ and R- lines,
and your unit’s R+ and R- lines go to the B&B unit’s T+ and T- lines, as shown in figure 2.
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