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Typical Pin/Signal Assignments*
|
RS232 signal |
RS485 signal |
DB-9 |
DB-25 |
RJ-50 |
| Carrier Detect (DCD) |
Common Ground |
1 |
8 |
10 |
| Received Data (RD) |
Clear To Send + (CTS+) |
2 |
3 |
9 |
| Transmitted Data (TD) |
Ready To Send + (RTS+) |
3 |
2 |
8 |
| Data Terminal Ready (DTR) |
Received Data + (RxD+) |
4 |
20 |
7 |
| Common Ground |
Received Data - (RxD-) |
5 |
7 |
6 |
| Data Set Ready (DSR) |
Clear To Send - (CTS-) |
6 |
6 |
5 |
| Request To Send (RTS) |
Ready To Send - (RTS-) |
7 |
4 |
4 |
| Clear To Send (CTS) |
Transmitted Data + (TxD+) |
8 |
5 |
3 |
| Ring Indicator (RI) |
Transmitted Data - (TxD-) |
9 |
22 |
2 |
* - ECLIPSECCTV.COM assumes no
responsibility whatsoever for the accuracy of this table. Any
designer using this table automatically assumes full
responsibility for any risk/damage to personnel or equipment.
Always follow safe wiring/design techniques and never exceed the
power ratings of your equipment.
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