Keri Systems NXT-4X4-NE Input/Output Expansion Module, No Enclosure

Input/Output Expansion Module, No Enclosure 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 control functionality, monitoring non-reader doors or other devices, and creating powerful action sequences by linking input triggers to outputs. The module can be connected anywhere 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