The PLCnext Control device is running a secure shell (ssh) daemon so, once the device is accessible on the local area network, you can go ahead and open a shell session on the device from the host:
$ ssh email@example.com The authenticity of host '192.168.1.10 (192.168.1.10)' can't be established. ECDSA key fingerprint is SHA256:uUhWsqX6TQy/KDZ4rdydja8zws7zCBLF5CI2/wm5owQ. Are you sure you want to continue connecting (yes/no)?
You are requesting to log on to the PLC as the user admin. This user is set up by default on every PLCnext Control. The warning about the authenticity of the host is normal when using
ssh to connect to a device for the first time. By answering
yes to the question, the following appears:
Warning: Permanently added '192.168.1.10' (ECDSA) to the list of known hosts. firstname.lastname@example.org's password:
... and after entering the default password (printed on the housing of the PLC), the PLC's command prompt will appear: