AS 1603.11:2018 pdf free.Automatic fire detection and alarm systems Part 11: Visual warning devices.
2.3 Luminance requirements for LED matrix, fixed message type VWD
2.3.1 Mean luminance
The mean luminance for LED matrix VWD shall be not less than 180 cd/rn2.
2.3.2 Uniformity
The ratio of maximum luminance to minimum luminance across the VWD shall be not less than 100:1 for character to background contrast.
Character to character uniformity shall provide a luminance differential of not more than ± 10 %.
2.4 Luminance requirements for programmable message type VWD
2.4.1 Mean luminance
The mean luminance for programmable message type VWD shall be not less than 180 cd/rn2.
2.4.2 Uniformity
The ratio of maximum luminance to minimum luminance across the VWD shall be not less than 10 0:1 for character to background contrast.
Character to character uniformity shall provide a luminance differential of not more than ± 10 %.
2.4.3 Flashing messages
For programmable message type VWD intended to flash in the alarm mode, or containing an attention- getting phase, the message shall remain constant while the VWD is flashing. Where the whole message cannot be viewed during the scrolling phase, it shall not flash.
2.4.4 Fire safety text messages
Representative text messages related to fire safety shall be provided and meet the requirements of Clauses 2.4.1, 2.4.2 and 2.4.3.
NOTE Message length and repetition timing should be considered.
2.5 Maximum rated viewing distance
The rated maximum viewing distance for the displayed characters shall be calculated based on an angle subtended by the eye of 18 mm of arc at the rated viewing distance.
2.12 Remotely controlled VWD
Where the VWD forms part of a fire detection and alarm system or emergency warning system and include interface equipment for remote control, the interface shall meet the requirements of at least one of the following pieces of equipment:
(a) An I/O Device conforming to AS 150 7240.18.
(b) A distributed part of control and indicating equipment (CIE) conforming to the relevant parts of AS 4428.16 or AS 7240.2.
2.13 Construction
2.13.1 Visual warning text contrast
Lettering shall be in a contrasting colour to the background.
2.13.2 Connecting facilities
The means of connection shall not permit removal of the VWD without initiating a fault signal at the CIE. Where this requirement can be achieved without providing a separate termination for each incoming and outgoing conductor, such alternative means of connection shall be considered satisfactory. This requirement includes any arrangement by which the VWD can be detached from its terminating facility.
The terminations shall be designed so that any connected conductors can be rigidly and effectively clamped between metal surfaces, or soldered, to ensure the connection will not slacken or overheat under normal conditions of use. For polarity-dependant VWD, reverse connection shall initiate a fault at the CIE and not damage the VWD.AS 1603.11 pdf download.