Reader that allows the door to be opened by bringing a proximity card or key fob closer. Only authorized cards or key fobs will power the device. No physical contact is necessary. Proximity reader that through a dipswitches configuration (SW2) that it incorporates can work in an autonomous or centralized system. Configuration as AUTONOMOUS: (1) Capacity of up to 400 user cards or key fobs. (2) Reader and controller integrated in the same module. It allows configuration as CENTRALIZED MDS-AC Plus and configuration as CENTRALIZED with Wiegand 26 protocol or Data / Clock.