| ??? 08/08/11 08:57 Read: times |
#183243 - schema Responding to: ???'s previous message |
Thank you very much for your hints...
Sure, I use UTP for transmission of A and B as you suggest. I use common GND for all RS485 units on the line as well (every device has its own galvanic isolation from the line). This common GND is connected to the chassis of the PC in the converter via 100R. Every device is connected to the common GND via 100R as well. You suggest capacitor so now I am not sure if my solution is correct... You can check the schema here: http://www.8052.com/users/waliz/converter.png GND-SIG = common GND for all RS485 devices on the line GND-ERTH = protective earth from the PC chassis You can also see ferrite feads in the line. First I thought it is a good idea to avoid high frequency noise but now I am not sure with it... Thank you for your opinion... Regards |
| Topic | Author | Date |
| Problem with RS232/RS485 converter... | 01/01/70 00:00 | |
| More info please | 01/01/70 00:00 | |
| probably | 01/01/70 00:00 | |
| more info... | 01/01/70 00:00 | |
| yes,i think | 01/01/70 00:00 | |
| input impedance | 01/01/70 00:00 | |
| i'm wrong | 01/01/70 00:00 | |
| what is the right value? | 01/01/70 00:00 | |
| did You tryed capacitor? | 01/01/70 00:00 | |
| thanks... | 01/01/70 00:00 | |
| it works...! | 01/01/70 00:00 | |
| congrats | 01/01/70 00:00 | |
| shape | 01/01/70 00:00 | |
| dont | 01/01/70 00:00 | |
| It is OK. | 01/01/70 00:00 | |
| Hints... | 01/01/70 00:00 | |
| schema | 01/01/70 00:00 | |
| Repair... | 01/01/70 00:00 | |
| transils... | 01/01/70 00:00 | |
| RS485 | 01/01/70 00:00 | |
| Sample Schematic | 01/01/70 00:00 | |
| Thank you very much for the schema... | 01/01/70 00:00 | |
| AVX varistors... | 01/01/70 00:00 | |
| capacitor | 01/01/70 00:00 | |
| capacitors... | 01/01/70 00:00 | |
| GNDs | 01/01/70 00:00 | |
| 1992 | 01/01/70 00:00 | |
| Thanks... | 01/01/70 00:00 | |
Links... | 01/01/70 00:00 |