| ??? 05/26/08 15:38 Read: times |
#155122 - why galvanic isolation ? Responding to: ???'s previous message |
you have stated again and again "I need galvanic isolation" WHY?
I run 485 buses at very high speeds without any. The only reason to use galvanic isolation is if you can not guarantee that the common mode voltage will not exceed the capability of the chip. i planed SN75LBC176 (i have these) just about the lousiest reason for choosing a chip (amateurs excluded) LTC1535 - Isolated RS485 Transceiver "if you need isolation" LT1785 - 60V Fault Protected RS485/RS422 Transceivers "industril strength" Erik |
| Topic | Author | Date |
| RS485 questions | 01/01/70 00:00 | |
| Yes its required | 01/01/70 00:00 | |
| + | 01/01/70 00:00 | |
| you can not achieve isolation .... | 01/01/70 00:00 | |
| + | 01/01/70 00:00 | |
| why common power and isolated 485? | 01/01/70 00:00 | |
| where to get supply | 01/01/70 00:00 | |
| RS485 experiences | 01/01/70 00:00 | |
| all the stuff inside | 01/01/70 00:00 | |
| Prifibus alike | 01/01/70 00:00 | |
| not with '176 | 01/01/70 00:00 | |
| sn75lbc176 planed | 01/01/70 00:00 | |
| why galvanic isolation ? | 01/01/70 00:00 | |
| what is wrong? | 01/01/70 00:00 | |
| then try MAX3158 | 01/01/70 00:00 | |
| how about this little gem? | 01/01/70 00:00 | |
| have you read it fully | 01/01/70 00:00 | |
| It's just another way to get the job done. | 01/01/70 00:00 | |
| OK, I'll bend it in neon | 01/01/70 00:00 | |
| Prifibus alike ..... it isn't | 01/01/70 00:00 | |
| Galavanic isolation | 01/01/70 00:00 | |
| Galavanic isolation | 01/01/70 00:00 | |
| Do it like Profibus | 01/01/70 00:00 | |
| economical approach | 01/01/70 00:00 | |
Thanks for all answers! | 01/01/70 00:00 |