For a follower, you can centrally manage up to 1,000 scanners with PaperStream Central Admin (formerly Scanner Central Admin Server).
For a leader, since up to 50 followers can be registered, you can centrally manage up to 51,000 scanners with PaperStream Central Admin, including 1,000 scanners registered with the leader.
For more details about a leader and a follower, please refer to "PaperStream Central Admin User's Guide".