Display modules provide real-time indication of the status of a VESDA detector. They have a 20-segment vertical bar graph display, a 2 digit numeric display, an audible sounder, clear alarm and fault indicators. They also have 4 push button keys to control the detector and the mode of the display. There are various versions of the display module depending on the type of detector and the relay configuration required. The VESDA VLS display has a fourth mode for the Numerical Display which shows the First Alarm Sector (FAS), this being the number of the sector (pipe) that has detected smoke. For the VESDA VLC the Fire 2 LED is omitted. The Display Module can be mounted into a detector unit, a remote mounting box or a 19in sub rack. Several displays can be configured to display information from a single detector in multiple locations.