MR-52 Series 3 is a dual door sub-controller with on-board flexibility to connect a wide range of security devices. The MR-52 Series 3 sub-controller is easy to install and provides the required I/O for interfacing two card readers, eight general-purpose input monitor points and six control relays to any Authentic Mercury series intelligent controller. The MR-52 Series 3 sub-controller has the same reliable interface and identical footprint as the Series 2, MR-52, which enables seamless upgrades for existing deployments. Features: Multi-facility code support. Multi-reader technology support. AES 128/256 bit data encryption. UL 294 recognized, CE compliant, FCC, RoHS. RS-485 host connectivity. Supports OSDP, OSDP Secure Channel, FICAM government profiles, keypads, biometric readers, Wiegand, clock and data, magnetic stripe, F/2F and supervised F/2F reader technologies.