system-config-printer gives the following message: No match for USB device: mfr "DYMO" model "LabelWriter 400 Turbo" desc "DYMO LabelWriter 400 Turbo" cmdset " " Please report this message in Bugzilla: https://bugzilla.redhat.com/bugzilla Choose 'foomatic' as the component. There is a record for this printer in the OpenPrinting database: http://www.linuxprinting.org/show_printer.cgi?recnum=Dymo-LabelWriter_400_Turbo - however, there is no foomatic driver yet. CUPS has a driver that works perfectly, but it's not yet present in foomatic.
CUPS should probably include a *1284DeviceID tag in that PPD. Filed upstream.