Hardware overview – Keri Systems Doors.NET Manual User Manual
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Doors.NET Reference Manual
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Hardware Overview
NXT
The NXT hardware platform provides unmatched system flexibility, ease of use, and cost
effectiveness. Using true peer-to-peer TCP/IP (Ethernet) communications for networking
between controllers and software, the system eliminates the single point of failure pre-
valent in many other access control systems. The NXT is the first of a new generation of
equipment to use encrypted data from Cards to Readers as well as reader supervision.
Intelligent controllers operate virtually autonomously minimizing network traffic and elim-
inating bandwidth concerns.
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2 or 4 door versions
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TCP/IP on-board based for peer-to-peer communication and to host
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Multiple 485 networks for communication to expansion boards and readers
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Embedded MAC address for easy discovery and true one button auto configuration
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Flash firmware updates
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4 supervised inputs / 4 outputs
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Flash firmware updates
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Networked via RS-485 to Controller
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Connected to Controller via RS-485 with a “heartbeat” so the expansion board is
supervised
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Configurable for up to 64 supervised inputs or 64 outputs
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Input and Output plug-on modules each in increments of 8
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Flash updating
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Networked to the NXT or NXT Mercury Powered controllers via RS-485
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RS-485 connection to the controller has a "heartbeat" making the expansion board
supervised
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Connected to Controller via RS-485 with a “heartbeat” so readers are supervised
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Encrypted data from Cards to Readers to Controllers
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128 bit encrypted format
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1,000’ (300 meters) cable distance to controllers
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Allows two NXT readers to be wired into the same bus for entrance and exit
through that door
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Available on the NXT Mercury Powered 2-door and 4-door controller types