The NXT-4X4 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, 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 outputs on an NXT-4D controller.

Expansion Module; Without Enclosure; 12 VDC; 250 mA; RS-485; 4 Input; 4 Output; Dimensions: WxHxD: 3.10 x 5.25 x 1 in.; -40 to +140 F