| ??? 07/02/10 08:17 Read: times |
#177050 - RE: Responding to: ???'s previous message |
Thank you for input and suggestion
>You appear to be using it to mean "High-voltage AC" - as in the mains >electricity supply. >Is that right? Yes... >If you are running ethernet UTP CAT5 cables next to noisy mains conduits, >then the twisting in the pairs and the transformers are reasonably effective. >The next step of isolation is STP, and if that doesn't work try POF (plastic >optical fibre). It's only UTP CAT5 cable outside home(crossing at neighbours yard)... >For example i saw Ethernet cards , used for PC to WAN connection with cable >5..10 meters long ,which going OUT of home - from PC to nearest WAN optical >converter. On these boards i noted small capacitors connected between RJ >connector and PC-ground. These capacitors were damaged. And because cards >are cheap - nobody tryed to understand - just replaced. 50 meters and more.. between hubs,MCUs with ethernet and PC LAN cards. Replacing cards in not an option.What about they done again(injected HVAC)? >http://www.carousel-design.com/SparkGap.html Thank's this for noise,spike,etc... Thank you Jeckson Ben |
| Topic | Author | Date |
| Protect ethernet MCU and Hubs | 01/01/70 00:00 | |
| Transformer isolation | 01/01/70 00:00 | |
| HVAC injected | 01/01/70 00:00 | |
| More info please | 01/01/70 00:00 | |
| Clarify "HVAC"? | 01/01/70 00:00 | |
| see it carefully | 01/01/70 00:00 | |
| PCB "Spark Gaps" | 01/01/70 00:00 | |
| RE: | 01/01/70 00:00 | |
| make Your side | 01/01/70 00:00 | |
RE2: | 01/01/70 00:00 | |
| agree | 01/01/70 00:00 |