MTL4842 HART® INTERFACE MODULE MTL systems interface Links up to 16 loops via backplanes Receives multiplexer control signals via interface bus from MTL4841 and selects one channel for communication Unit address Switch selectable on top of module Interface bus Total length of interface bus between module 1 and module 16 must not exceed 4m LED indicators Green: one provided for power Amber: one to indicate unit is selected by MTL4841 Red: four to identify loop address Power requirements Powered from backplane Power consumption <0.1W