The normal ethernet components configuration: MAC <-> PHY <-> Magnetics <-> RJ45. My RJ45 connector must be mounted on the system box's front panel, so there must be a wire routed from the PCB to the front panel connector. My system box contain many relays, so there may some interference from them. Now, I have several choices:
- Locate the magnetics at RJ45 connector side. And using CAT5 UTP wire to the main PCB. Then I can choose a RJ45 connector with integrated magnetics.
- Locate the magnetics at the PHY side, that is on the main PCB. Then use wires connect to the connector, which without integrated magnetics.
- If I can use two magnetics, one on main PCB, and one on the connector side?
Which method is better?