The 3ADT218522S0111: The 75 dB(A) sound level is typical for a forced-air-cooled converter of this rating — it will be audible in a control room, so plan for enclosure acoustic treatment if noise is a constraint.
Environmental and protection
Operating humidity range of 5 to 95% RH covers most industrial environments without condensation management. The auxiliary terminals carry an IP00 rating per IEC 60529 and IEC 60947-1 — meaning no protection against solid objects or moisture at the terminal block. In a panel, that is normal; in a washdown area, you need a higher-rated enclosure around the whole converter.