Hi... I'm working on a pretty simple collection of off the shelf networking parts and without going into too much detail, what I'm looking for is a component (diode I'm pretty sure) to insert at a certain place to ensure the 24vdc doesn't flow in the wrong direction. I've been doing a fair amount of reading on the subject and I often find myself too deep into the conceptual weeds. I'm no electrical engineering wizard but I know enough to be dangerous.
As you can see from the napkin sketch, I don't want my 24vdc input power to flow back out of my LAN port through my POE injector (which has no diodes) because if someone plugs in a device it could be damaged by the unexpected voltage. That said, I DO want power to be fed into the LAN port via POE (Power Over Ethernet) so that it can make its way over to the CP (CradlePoint) device.
Is there enough information here for someone to point me to the type and size of diode that would best prevent backflow of the 24vdc as described?
Thanks!
As you can see from the napkin sketch, I don't want my 24vdc input power to flow back out of my LAN port through my POE injector (which has no diodes) because if someone plugs in a device it could be damaged by the unexpected voltage. That said, I DO want power to be fed into the LAN port via POE (Power Over Ethernet) so that it can make its way over to the CP (CradlePoint) device.
Is there enough information here for someone to point me to the type and size of diode that would best prevent backflow of the 24vdc as described?
Thanks!