Lenel LNL-X4420 Dual Reader ControllerThe LNL X4420 is an Advanced Dual Reader Controller that provides a single board solution for interfacing up to 64 doors, plus auxiliary inputs and outputs, to an OnGuard system. The LNL X4420 controller enables Ethernet connection directly from an entry location to the OnGuard server. In addition, other I O and reader interface modules can be added on the controllers two downstream ports, further expanding its capabilities. In the event of