Two types of OAU 2F are available for the RTN 320F: OAU 2F (DC option) and OAU 2F (P&E option). Except for the installation of the power cable, other installation operations are the same between the OAU 2F (P&E option) and the OAU 2F
(DC option). Unless otherwise specified, the OAU 2F (DC option) is used as an example.