You can export or import your contacts using Web Config or other tools.
For Web Config
You can back up the scanner settings, including your contacts, by exporting them. The exported file is a binary file and cannot be edited.
When you import scanner settings that include a contacts list, the contacts are overwritten.
For Epson Device Admin
You can export only your contacts from the device’s property screen.
If you do not export the security-related items, you can edit the exported contacts and import them because this can be saved as a SYLK file or csv file.
You can register settings to multiple scanners at once. It is useful if you want to back up only the contacts or when you replace the scanner and you want to transfer the contacts from the old one to new one.
For details, see the manual or help for Epson Device Admin.