RJ45 selection for POE powered device PD

xiaoxiao2211

RJ45 selection for POE powered device PD [Copy link]

Can POE use a regular RJ45 connector (without a transformer)? Are there any current requirements? What should I pay attention to when selecting a model?

topwon

According to my experience, POE should use RJ45 terminals without transformers, right? The power components must be drawn out before the transformer and sent to the power module. The terminals with built-in transformers are difficult to handle.

xiaoxiao2211

topwon posted on 2019-1-22 10:58 According to my experience with the solutions I have used, POE should use RJ45 terminals without transformers, right? The power components must be drawn out before the transformer to send the power...

I am using an RJ45 connector without a transformer, but I don't know what the requirements are for selecting this RJ45 connector, or can I use an ordinary RJ45 connector?

海尔

Learned

topwon

xiaoxiao2211 posted on 2019-1-22 15:35 I am using the RJ45 connector without a transformer, but I don't know if there are any requirements for the selection of this RJ45 connector, or if it is a normal RJ45 connector...

There should be no special requirements. A normal RJ45 terminal without a transformer will do.

langtuodianzi

Function of network transformer: In theory, it is possible to connect directly to RJ45 without connecting a transformer and it can also work normally. However, the transmission distance is very limited, and when connected to different level network ports, it will also be affected. And the external interference to the chip is also very large. When the network transformer is connected, it is mainly used for signal level coupling.