My interpretation of 23.2.2 in the new standard is as follows:
The following recommendations apply to the facilities provided for visual indication of fire signals.
a) The indicating facilities should be suitable for the fire and evacuation procedures intended for the
building. In complex premises, there should be adequate consultation between the interested parties
to ensure that appropriate indicating facilities are provided.
b) The primary indication of the area(s) from which a fire signal(s) has originated should comprise an
indication of the zone.
c) The form of zone indication should comprise a separate light-emitting indicator for each zone of the
system (e.g. a LED matrix or illuminated mimic diagram), such that the indicating equipment is capable
of simultaneous display of fire signals on every zone.
NOTE In very large premises it may be acceptable to use a hierarchal arrangement of displays. For example, control and
indicating equipment may indicate the sector of origin, while further indicating equipment in the sector indicates the detection
zone(s) of origin.
d) A visual display unit (VDU) may be used to provide the display recommended in 23.2.2c) provided that:
1) the VDU can provide a simultaneous display of fire signals in all zones, without manual intervention; and
2) because the reliability of a single VDU is not adequate, a back-up form of zone indication is provided; this may comprise a second method of indication complying with 23.2.2c), a second VDU or a printer configured to automatically print out the fire information.
NOTE Printers are not considered suitable as a primary indication since, in the event of ink, ribbon or paper being exhausted, the indication will be lost. They may, however, be acceptable as a back-up or supplement to another display.
e) On or adjacent to indicating equipment, there should be a diagrammatic representation of the
building, showing at least the building entrances, the main circulation areas and the division into zones.
Where the division into zones is not provided by the display recommended in 23.2.2c) or 23.2.2d), a
correctly orientated plan of the premises should be displayed.
Leastwise thats how I read it!
