The Ethernet1 connection X4 is designed as a terminal block in LSA+ technology. Hard-wired communication (e.g. for SmartHome or a charging network) may only be carried out on this LSA+ connection. The Ethernet2 connection X3 (RJ45) is only used for diagnostic purposes on the device (debugging).
At DE 440 there is only RJ45 and can therefore be used.
It is not possible to operate both connections at the same time.