Keri Systems NXT-4X4-UL 4 Input / 4 Output Auxiliary I/O and Local Door Control Module with Enclosure | 123 Security Products

The NXT-4X4-UL 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. The module