The infrastructure division of the FS, or RFI - Italian railway network, is equipped with three E402B electric locomotives for towing diagnostic trains intended for monitoring the status of the network, indetails of units 101, 142 and 149.
After a General Overhaul carried out in the Foligno workshops, the E.402 142 was returned to service in January 2021 in the new flashy yellow / blue livery, which currently characterizes all the diagnostic trains in charge of RFI.