Vilma, who currently is rehabbing an injured knee, will be eligible to return after Week 6.
Vilma, along with Saints defensive end Will Smith, had their suspensions overturned Sept. 7 by an arbitration appeal panel. Both players had been suspended by the NFL for their involvement in the Saints' "bounty" program.
The Saints also have signed wide receiver Adrian Arrington and tackle Bryce Harris to the active roster.
UPDATE: Vilma expressed disappointment Monday in having to watch from the sidelines for the time being.
Disappointed I'm missing the next 4 games on PUP... but no superbowl was ever won by wk 6 of the season #whodatâ Jonathan Vilma (@JonVilma51) September 11, 2012