Rosslare Security Products AC225 Scalable Ip Networked Access Controller Up to 30,000 users with access rights for every panel, across optional 4092 modular doors in a system 20,000 FIFO (First In First Out) history event log, when offline Full intelligent logic interconnection of inputs, outputs, readers, and more Additional 8 inputs, 4 outputs with MD-IO84 IO expansion Additional 2 readers with 4 inputs, 4 outputs with MD-D02 2-Door expansion