GB Sound module MSM-1
18.01.2024 BEIER-Electronic 26
In addition, a switch can also be connected to the plus line of the supply voltage to
switch off the entire sound module. This has the advantage of lower power
consumption if no sound is needed for a long time. However, the light outputs of the
module do not work either!
If the power supply to the speed controller is to be disconnected from the
battery (e.g. for tests without a drive), the plus cable of the battery must always
be disconnected first (or plus and minus at the same time)!
Never disconnect the negative cable first (or only)!
Connecting the speaker:
The loudspeaker is connected to the MSM-1 in connector X7 (white).
The red cable of the speaker connection cable is connected to the positive pole of
the speaker, the black cable to the negative pole of the speaker. If it is not clear
which connection is plus or minus on the speaker, the connection cables can be
attached anywhere.
If possible, the connection cable supplied for the loudspeaker should not be extended
in order to avoid interference with the receiver (especially with FM systems)! The
speaker cable should also be laid as far away as possible from the receiver and the
antenna.
Notes on the power supply for the receiver:
The voltage at terminals X1/1 and X1/2 only supplies the LF amplifier for the sound
output, the switching outputs and the remaining internal electronics of the sound
module with power.
The receiver is not supplied with this voltage. But it doesn't matter to the sound
module if, for example, a voltage comes in to X2 via a BEC or a receiver battery.
A BEC voltage from the speed controller is passed on directly to the receiver via the
X2 connections.
The receiver power supply can be planned in the same way as if no sound module
were connected at all. So, for example, if there are 2 speed controllers with BEC, one
BEC must be deactivated.
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