7
Installation and Maintenance Instructions
Model 450E Electronic Horn
In addition to fire alarm system applications, the Federal Signal
450E horn is excellent for general alarm, start and dismissal, coded
paging, and process control signaling in areas of high ambient
noise levels.
The Model 450E can be used indoors or outdoors, depending on
the back box used. When used with the weatherproof Model WB
back box, it meets Type 4X and IP66 requirements.
Table 1 Specifications
Operating Voltage: Fire Alarm Use: Regulated 24 Vdc (16-33 Vdc)
General Signaling Use: 12-24 Vdc
Current:
0.25 A
Inrush Current:
764 mA rms over a 16.7 ms time window
Audibility Rating:
89 dB per UL Reverberation Room.
98 dBA per ULC Anechoic Chamber.
For directional characteristics refer to Figure 2.
Figure 2 Dispersion characteristics for audible signal devices
AUDIBLE SIGNAL DEVICE
85 dB
85 dB
3 m
-6 dB
-6 dB
–3 dB
–3 dB
99 dB
3 m
14º
27º
