Keri Doors.NET four door/eight reader TCP/IP controller. Reduce cabling costs over RS-485, current loop, or other traditional networking schemes by using shielded CAT-5. Utilize existing LAN/WAN/Ethernet or pull your own dedicated CAT-5/6 network. Embedded MAC address for one button auto-configuration. Standard 4 pin block and RJ-45 jack built-in for network connection. Re-assignable inputs and outputs. Quick disconnect connectors. Locking metal enclosure (no-enclosure option). 128 Bit encryption. Keri offers NXT controllers with optional mercury firmware to provide enhanced functionality. Enclosure measures 10-5/8-inches width by 13-1/8-inches height by 3.06-inches depth, PC Board measures 6-19/32-inches width by 5-19/32-inches height by 2-35/64-inches depth. Input voltage: + 12 VDC nominal (10 - 14 VDC). Current draw: 650 mA typical. Inputs (8, reassignable): door contact switch (4), request to exit (4), expandable up to 24 inputs. Outputs: (4, reassignable) 1 amp (24 VDC max.) dry circuit expandable up to 20 outputs. Reader capacity: 8 with NXT Readers (8 reader capacity requires the mercury firmware option and NXT readers), 4 with Wiegand or MS readers. Buffer capacity: 50000 cardholders 10000 events. Temperature: -40 degrees C to 60 degrees C. Humidity: 0-90 percent non condensing. Communication to server: TCP/IP 10/100 bus between controllers: TCP/IP 10/100 bus. Lithium battery: 5 years memory retention.