Vigilant BOWS Installation & Operation Manual
Document: LT0554
Page
6 September 2012
Issue 1.20
4-6
EOLR
47k
DUAL LINE
SDM-4
+
Line
-
SDM-4
+
Line
-
SINGLE LINE
(See Note 1)
EOLR
100k
EOLR
100k
(See Note 1)
(See Note 1)
Note 1: Capacitor 10V bipolar. Value 1-5uF per watt of speaker load.
Figure 16. Speaker Wiring (SDM-4 100V Line Outputs)
The BOWS has a background music input compatible with most audio
sources fitted with 3.5mm audio socket outputs, such as iPods, radios,
etc. The background music input is located on the BOWS Interface board
as shown in Figure 17. A level adjustment control (VR1) is provided to
adjust the output volume.
Two connection options are available:
a) 3.5mm audio socket (J11)
b) screw terminals on connector J24 (Table 12)
The audio socket is a stereo socket. The BOWS will combine the left and
right channels to provide a single mono output. Note that if a mono plug
is inserted the effective audio level will be halved.
Table 12. BOWS Interface BGM Screw Terminals
0V
0V
BM SIG
Background Music
The input will support audio levels up to 1Vrms, and will allow maximum
output volume at an input level of approximately 200mVrms.
Background
Music Input
