When PoE is applied to the TPDIN-POE-RELAY, the relay closes and the LED turns ON. When PoE power is removed, the relay turns off and the LED turns OFF.
There are two connections, a normally closed and a normally open, so that both relay logic states can be utilized.
Many modern PoE switches allow an operator to enable or disable the PoE on a particular port.
This PoE switch function can be used to control the relay.


