| ??? 11/11/06 15:27 Read: times |
#127782 - GND of RS485 bus, PROFIBUS Responding to: ???'s previous message |
Ap said:
Kai Said:
The RS485 signal lines is galvanically isolated from the cable shield. There's only a 10nF cap bewteen both ... Do you mean this Between both means 485TX---10nf----|Gnd and 485RX------10nf----|Gnd Sorry, I should have been more precise. What I meant is a 10nF cap between the common GND line of RS485 bus and the chassis ground, like it's shown here: 
And the following picture shows, that the cable shield is connected to protective earth at several points: 
Kai |
| Topic | Author | Date |
| Lightning protection | 01/01/70 00:00 | |
| there is much to this | 01/01/70 00:00 | |
| Lightning protection | 01/01/70 00:00 | |
| so doesa EMI | 01/01/70 00:00 | |
| Mr. Faraday knew how... | 01/01/70 00:00 | |
| THICK metal | 01/01/70 00:00 | |
| Direct Hits | 01/01/70 00:00 | |
| Keep it out of the encosure! | 01/01/70 00:00 | |
| My pplication | 01/01/70 00:00 | |
Details? | 01/01/70 00:00 | |
| I disagree | 01/01/70 00:00 | |
| No, no... | 01/01/70 00:00 | |
| Disconnecting the shield at one end of the cables | 01/01/70 00:00 | |
| a) and b) | 01/01/70 00:00 | |
| Yes, crossed opinions... | 01/01/70 00:00 | |
| and the twain shall never meet | 01/01/70 00:00 | |
| the Shield | 01/01/70 00:00 | |
| The RS485 signal lines is galvanically........... | 01/01/70 00:00 | |
| GND of RS485 bus, PROFIBUS | 01/01/70 00:00 | |
| If you get this close | 01/01/70 00:00 |