Nxt mercury-powered controllers – Keri Systems Doors.NET Manual User Manual
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Doors.NET Reference Manual
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NXT Mercury-Powered Controllers
The NXT-2D/4D Mercury-Powered controllers bring enhanced capability to the Door-
s.NET software. By embedding Mercury's firmware in the controllers a whole new set of
features becomes available. The controllers provide decision making, event reporting
and database storage for the Doors.NET system and once programmed are carried out
completely independent of the PC controlling access, managing alarms and interfacing
with an array of reader technologies when using NXT Reader Interface Modules (RIMs)
which support Keri's MS-series readers, Wiegand and magnetic stripe.
The supported NXT family of readers communicate via an RS-485 protocol, thereby
allowing for cable runs of up to 1000 feet (300m). They also utilize a communication
'heartbeat' making them fully supervised. An event will appear in the software when the
controller is online if the reader cable is disconnected or cut. In addition, an NXT Exit
reader can be wired into the same RS485 reader port, allowing you In/Out reader cap-
ability without have to use two separate reader ports. Once added in the software both
readers will activate the same strike relay but in terms of events, reporting and access
groups the two readers are treated completely independently.
These are very powerful system processing modules that are capable of controlling 2 or
4 doors/readers and also dozens of input and output points when using the additional
or the
modules, which are wired into the controller's RS-485 com-
munication ports.
is also offered with this controller type. The Elevator Control feature
allows you to control up to 10 floors from a single 2-door or 20 floors from a single 4-door
controller with an NXT 4x4 module wired into each of the RS-485 ports. Or up to 128
floors can be controlled when using NXT-GIOX units. A maximum of two GIOX units can
be used on a controller, but when fully populated with NXT Output modules each will
give you 64 floors, making it an extremely cost-effective elevator control solution.
Based on the highly-intelligent, next generation Mercury Access Foundation, the plat-
form uses an on-board 10-BaseT/100 Base TX Ethernet port for connection to the Door-
s.NET software to provide access control, alarm management, plus scheduled and
automated operations all in one package. The result is the ultimate in power and flex-
ibility, versatility and the reliability you need for system success.