Voltage Monitoring; Beier-Electronic; Sound Module Usm; Current Monitoring - beier USM-RC-2 Operating Manual

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Voltage monitoring

The sound module measures permanenty the connected supply voltage. If the
voltage drops below an adjustable value for longer than 10 seconds, different actions
can be triggered:
 Playback of a warning sound at empty battery (z.B. „Please load battery")
 Playback of a warning sound at undervoltage (e.g. "Attention undervoltage")
 Switch off the sound module
 Switch off all outputs
Some battery types (e.g. LiPo-batteries) should not be subjected to deep discharge,
because this can damage the battery! With the help of the integrated voltage
monitoring, it is now possible to warn the user.
There are 2 thresholds in the Sound-Teacher:
 Threshold for charging battery
 Threshold for undervoltage
The thresholds of the voltage monitoring are freely adjustable and lies between 4,5
and 14,0V.
Here is a list with usual values for different battery types:
Battery typ
Nickel-cadmium
and
nickel-metallhydrid
Lead battery
Lithium-Ionen
Lithium-polymer (Lipo)
These values are only guidelines, the best is to read the user manual of the battery,
to find out the exact deep-discharge voltage.

Current monitoring

Every switching-output features current monitoring, to detect overcurrent and to
switch off all outputs in order to protect them from damage.
Nevertheless, the outputs are not completely short-circuit proof! Therefore you have
to avoid short circuits at the outputs!
03.02.2014
Battery voltage
6,0V (5 cells)
7,2V (6 cells)
8,4V (7 cells)
9,6V (8 cells)
10,8V (9 cells)
12,0V (10 cells)
6,0V (3 cells)
12,0V (6 cells)
7,2V (2 cells)
10,8V (3 cells)
7,4V (2 cells)
11,1V (3 cells)

BEIER-Electronic

Sound module USM-RC-2
Threshold for voltage
monitoring
5,0V
6,0V
7,0V
8,0V
9,0V
10,0V
5,0V
10,0V
5,0V
7,5V
6,0V
9,0V
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