D
Sound module USM-RC-2
03.02.2014
BEIER-Electronic
15
Connection of the loudspeaker:
You can connect 1 or 2 loudspeakers to the USM-RC-2. The first loudspeaker is
connected to terminal X5. The second loudspeaker can be connected optionally to
terminal X6.
The red wire of the loudspeaker connection cable is connected to the positive pole of
the loudspeaker. The black wire of the loudspeaker connection cable is connected to
the negative pole of the loudspeaker.
You are not allowed to connect the loudspeaker outputs to each other! So do
not try to connect both loudspeaker outputs to 1 loudspeaker!
The supplied loudspeaker connection cables should not be extended to prevent
interference of the receiver (especially by FM systems)! The loudspeaker connection
cables should be installed far away from the receiver and the antenna.
Informations about the power supply of the receiver:
The voltage at the terminals X1/1 and X1/2 powers the audio amplifier for the sound
playback, the switching outputs and the rest of the internal electronics of the sound
module.
The receiver is not powered with this voltage, so no current flows out at the prop.
inputs X2. Also it does not matter, if e.g. a voltage is connected to X2 over a BEC or
a receiver battery.
A BEC voltage from the speed controller is directly connected to the receiver over the
terminals of X2.
Therefore you can plan your receiver's power supply just as if you connect no sound
module. For example for 2 speed controllers with BEC, one BEC must be disabled.
Connection of the switching-outputs:
The outputs 1 to 10 of the module are located at the pin connector X3. The outputs
11 and 12 are located at X1/9 and X1/10.
For outputs 1 to 10 it is recommended to use the supplied ribbon cable, which is easy
to mount on the pin connector. Of course other cables/plugs can be connected to X3.
The sound module is always switching the negative pole to each output and thus to
the connected load. The positive pole is always connected permanently to the load
(see wiring diagram).
The common positive pole for all outputs is located at X1/8. But you can also connect
for example the load directly to the positive pole of the battery.
Ribbon cable assignment:
Output Ribbon
cable
