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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e2s.com Fax: +44 (0)208 740 4200
Document No. D211-00-471-IS-SC Issue A 27-11-19 Sheet 6 of 8
12) Light output for Fire alarm use
In order to meet the requirements for UL1971, (D2xB1LD3DC024 only when used without plastic lens cover or wire guard), the
installation must be carried out to the correct NFPA standards and guidelines.
12.1
Horizontal Light Output Dispersion for wall mounting
– public mode
0°
15°
15°
30°
45°
60°
75°
90°
90°
30°
45°
60°
75°
Fig. 9
– Horizontal dispersion angles for wall mounting
Table 2 - Horizontal Light Output Dispersion for Wall Mounting
Viewing Angle
% of Rating
Intensity (cd) at
1Hz flash rate
Intensity (cd)
at 1.33Hz flash
rate
Intensity (cd)
at 1.5Hz flash
rate
Intensity (cd)
at 2Hz flash
rate
0º
100
80.1
77.1
77.3
82.1
5º
90
72.1
69.4
69.5
73.9
10º
90
72.1
69.4
69.5
73.9
15º
90
72.1
69.4
69.5
73.9
20º
90
72.1
69.4
69.5
73.9
25º
90
72.1
69.4
69.5
73.9
30º
75
60.1
57.8
58.0
61.6
35º
75
60.1
57.8
58.0
61.6
40º
75
60.1
57.8
58.0
61.6
45º
75
60.1
57.8
58.0
61.6
50º
55
44.1
42.4
42.5
45.2
55º
45
36.0
34.7
34.8
37.0
60º
40
32.0
30.8
30.9
32.9
65º
35
28.0
27.0
27.0
28.8
70º
35
28.0
27.0
27.0
28.8
75º
30
24.0
23.1
23.2
24.6
80º
30
24.0
23.1
23.2
24.6
85º
25
20.0
19.3
19.3
20.5
90º
25
20.0
19.3
19.3
20.5
45º Compound
24
19.2
18.5
18.5
19.7
