TwinCAT 3.1 offers an option to manage TwinCAT software licenses via the EtherCAT Terminal EL6070. The EL6070 embodies the hardware license key in the modular EtherCAT I/O system. Data transfer takes place via EtherCAT.
Note that the EL6070 and EL6070-0033 are two different devices in terms of EtherCAT and are therefore not interchangeable in the EtherCAT I/O configuration.