It's not possible to have dry contacts in that module (unless maybe opening and hardware hacking that module: a risky and not recommended operation)

in fact:

• N and L are to be connected to mains, and necessary for the device to work
• Output L1 and Output L2 are hot terminals controlled by software or from inputs
• S1 and S2 are inputs

You can always add an external 220V relay to obtain dry contacts.

Maybe this question should have been posted to electronics.stackexchange.com since it is not connected with the software inside the module