MEDC DB3B - Manual (Page 10)

07/14 © MEDC 2014
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.
Stages
For all versions, a 5-way DIP switch selects the stage required for each stage. The settings for the standard stages
are shown in the table below:
Tone table 1:
TONE
No.
TONE FREQ/DESCRIPTION
SWITCH
SETTING
12345
TONE DESCRIPTION
Nominal SPL
(dB(A) @ 1m)
1 Alt Stages 800/970 Hz at 1/4 sec 11111 112
2 Sweeping 800/970 Hz at 7 Hz 11110 Fast Sweep (LF) 111
3 Sweeping 800/970 Hz at 1 Hz 11101 Medium Sweep (LF) 113
4 Continuous at 2850 Hz 11100 111
5 Sweeping 2400-2850 Hz at 7 Hz 11011 Fast Sweep 112
6 Sweeping 2400-2850 Hz at 1 Hz 11010 113
7 Slow Whoop 11001 Slow Whoop 113
8 Sweep 1200-500 Hz at 1 Hz 11000 Din Stage 117
9 Alt Stages 2400/2850 Hz at 2 Hz 10111 111
10 Int Stage of 970 Hz at 1 Hz 10110 Back-up Alarm (LF) 112
11 Alt Stages 800/970 Hz at 7/8 Hz 10101 112
12 Int Stage at 2850 Hz at 1Hz 10100 Back-up Alarm (HF) 112
13 970 Hz at 1/4 sec on 1 sec off 10011 112
14 Continuous at 970 Hz 10010 112
15 554 Hz for 0.1S/440 Hz for 0.4S 10001 French Fire Sound 113
16 Int 660 Hz 150 mS on 150 mS off 10000 Swedish Fire Alarm 108
17 Int 660 Hz 1.8 sec on 1.8 sec off 01111 Swedish Fire Alarm 108
18 Int 660 Hz 6.5 sec on 13 sec off 01110 Swedish Fire Alarm 109
19 Continuous 660 Hz 01101 Swedish Fire Alarm 108
20 Alt 554/440 Hz at 1 Hz 01100 Swedish Fire Alarm 113
21 Int 660 Hz at 7/8 Hz 01011 Swedish Fire Alarm 108
22 Int 2850 Hz 150 mS on 100 mS off 01010 Pelican Crossing 111
23 Sweep 800-970 Hz at 50 Hz 01001 Low Freq. Buzz 109
24 Sweep 2400 -2850 Hz at 50 Hz 01000 High Freq. Buzz 111
25 3x970 Hz pulses 0.5 off, 1.5 off 00111 112
26 3x2850 Hz pulses 0.5on/0.5off, 1.5 off 00110 112
27 Int 3100 Hz 0.32s on/0.68s off 00101 105
28 Continuous 1400 Hz 00100 125
29 Spare / Custom tone 00011
30 Spare / Custom tone 00010
31 Spare / Custom tone 00001
32 Spare / Custom tone 00000
Note: If special tones were requested at the time of ordering, please see the separate tones list supplied with the unit
for details of these special tones and their respective switch settings.
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.
If using an EOL resistor with a value between 700Ω and 2KΩ the maximum voltage should be limited to 28.8Vdc, if
using an EOL resistor with a value between 470Ω and 700Ω the maximum voltage should be limited to 26Vdc.