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TM293 MEDC DB3BM UL Technical Manual
Sounder/Horn – dB3BM uL
TM293.A August 2022 www.eaton.com
4.0 OPERATION
The sounder is available in various AC input voltage
versions and a single DC input voltage version.
For AC versions, the nominal operating voltage is stated on
the unit label and the supply voltage tolerance is ±10%.
For DC versions, the absolute input voltage range is
11.0Vdc to 57.6Vdc. For full ratings data see section 6
If using EOL resistors the maximum total power
dissipation of the resistors will be limited to 3W.
The unit is fitted with a volume control which is positioned
on the top face of the electronics assembly PCB.
Maximum volume is obtained when this control is turned
fully clockwise. When turned fully anti-clockwise the unit
will emit no sound.
Warning:
Do not attempt to turn the volume control past
its limits of movement as this may cause damage to the
unit.
Warning:
The unit has a certified upper operating
temperature limit of +85°C, however continuous operation
is not recommended in ambient temperatures above
+70°C
Sound Pressure Output
Minimum Audibility ratings according to UL464 and sound
pressure level according to CAN/ULC-S525 are below as
tested on tones 4,14,19 and 28
Directional Characteristics
Rated SPL directional characteristics as measured in
accordance with CAN/ULC-S525-07 at 11v DC / 2850Hz
at 3 Meters
Flare option.
Tone no.
Audibility rating uL464
(oSPL dBA at 10ft)
Can/uLC-S525
(oSPL dbA at 3M)
Long Flare
4
81.4
97.8
Long Flare
14
93.0
92.9
Long Flare
28
92.6
107.6
Long Flare
19
89.0
98.6
Short Flare
4
81.5
89.4
Short Flare
14
87.7
92.4
Short Flare
28
91.3
101.6
Short Flare
19
80.9
91.0
Angle
oSPL (dBA)
Angle
oSPL (dBA)
Short Flare Horizontal Axis
On Axis 90°
88.91
On Axis 90°
88.91
120°
85.78 (-3dBA)
55°
85.26 (-3dBA)
130°
82.49 (-6dBA)
50°
82.37 (-6dBA)
180°
63.1
0°
78.24
Short Flare Vertical Axis
On Axis 90°
88.76
On Axis 90°
88.76
130°
84.45 (-3dBA)
55°
86.02 (-3dBA)
135°
82.79 (-6dBA)
50°
81.21 (-6dBA)
180°
56.39
0°
72.8