The E-560 is the 600v version of the E-540 (400v) and the E-520 (200v). I know that the FR-PU04 can be used on the 200v and 400v versions. It should be the same for the 600v version. Live MikeVT said, just check that the drive has a CAT5 style connection.
This link confirms that the FR-PU04 works with the entire E-500 line: