Keri Systems Doors.NET Manual - Manual (Page 203)

Doors.NET Reference Manual
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4x4 I/O Board
The NXT-4D Input/Output Expansion Module provides functionality to any Doors.Net
access control system by adding auxiliary I/O that can be used for additional access con-
trol functionality, monitoring non-reader doors or other devices, and creating powerful
action sequences by linking input triggers to outputs. The module can be connected any-
where along the RS-485 trunk/buss, most commonly at the controller or near a reader.
One module can be added per trunk, allowing up to an extra 8 inputs and 8 outputs on
an NXT-2D Controller and an extra 16 inputs and 16 outputs on an NXT-4D Controller.
The module’s relays are re-assignable and interchangeable with the main controller’s
relays. The module can be mounted next to the door providing local door control and
local door alarm functions while minimizing the cable bundle from door to controller. The
unit also has a port to plug in an NXT-RM3 Reader Interface Module to allow non-NXT
reader signals to be sent down the RS-485 line and a tamper input.
NXT-4x4 I/O Board
Specifications
Size (Enclosure)
l
8” H x 7” W x 2.75” D
l
20.32 cm x 17.78 cm x 6.98 cm