| ??? 05/01/05 13:13 Read: times |
#92671 - IMHO Erik is right.. Responding to: ???'s previous message |
In my opinion Erik is right. Disconnect your board from the PC and measure the voltage between two grounds (I mean grounds of the PC computer and your board).
RS232 should work proper from -25V up to +25V. You don't tell us, what kind of driver you are using, but can it supply so high voltage to destroy PC's RS232 port? I think no. But in some cases, when grounds are connected to different potentials - yes. Check this, please. How to prevent your PC port? Give us more informations about output driver and your application. Maybe you can (or you should) use some overvoltage circuits? Jacek |
| Topic | Author | Date |
| Serial Port | 01/01/70 00:00 | |
| ground is not ground | 01/01/70 00:00 | |
| Grounded !!! | 01/01/70 00:00 | |
| yes, if you measure | 01/01/70 00:00 | |
| Connecting grounds of different circuits | 01/01/70 00:00 | |
connected | 01/01/70 00:00 | |
| No isolators? | 01/01/70 00:00 | |
| MAX232 is not an isolator | 01/01/70 00:00 | |
| B & B Electronics | 01/01/70 00:00 | |
| MAX232 is no isolator indeed | 01/01/70 00:00 | |
| IMHO Erik is right.. | 01/01/70 00:00 | |
| serial port cable | 01/01/70 00:00 | |
| Damages??? | 01/01/70 00:00 |