Vilma, who currently is recovering from offseason knee surgery, will be eligible to return after Week 7. The Saints, who will have their bye in Week 6, opted to put Vilma on the PUP list after his roster exemption expired Monday.
Vilma, 30, can participate in team meetings and will be allowed to use the Saints' training and medical facilities. But the three-time Pro Bowler cannot practice with the team.
Vilma had his season-long suspension overturned Friday by a three-member appeals panel, which ruled that NFL commissioner Roger Goodell does not have authority to punish players for any salary-cap violations committed in the Saints' alleged bounty scheme.
Although he did not suit up for Sunday's season-opening loss to the Washington Redskins, Vilma led the Superdome crowd in a spirited pregame "Who Dat" chant and watched the game from the sideline.
The Saints have also brought back fifth-year receiver Adrian Arrington, who had been cut on Saturday after struggling with right knee soreness heading into Week 1, and signed offensive tackle Bryce Harris from Atlanta's practice squad.
ESPN's Ed Werder and The Associated Press contributed to this report.