| ??? 05/26/08 07:43 Read: times |
#155110 - Prifibus alike ..... it isn't Responding to: ???'s previous message |
Stefan Kanev said:
My questions are - if power supply is delivered trough linear regulators (as on drawing) - what kind of problems i must expect. You said you need Galavanic isolation didn' t you?. The power supply in the above scheme isnt galvanically isolated ? , as you connect the boards through a common power supply the first thing comes to my mind is you may suffer from Gnd loops .Second if powersupply of one node gets damaged or short it will shut the entire process instead of one node . Please have a look below what is reccomeded as a Galvanically isolated RS485 link . 
-Ap |
| 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 |