The MR52-S3B is a dual-card reader interface panel with on-board flexibility to connect to a wide range of security devices. This economical, high-performance device is easy to install and provides all the necessary I/O for controlling 2 doors with auxiliary point control and monitoring. Each unit can connect 2 card readers, 8 general-purpose input monitor points, and 6 control relays to any Mercury EP series intelligent controller.
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