Technical data

D Sound module USM-RC-2
01.03.2012 BEIER-Electronic 45
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 (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.
The threshold of the voltage monitoring is freely adjustable and lies between 5,0 and
14,0V.
Here is a list with usual values for different battery types:
Battery typ Battery voltage Threshold for voltage
monitoring
Nickel-cadmium
and
nickel-metallhydrid
6,0V (5 cells)
7,2V (6 cells)
8,4V (7 cells)
9,6V (8 cells)
10,8V (9 cells)
12,0V (10 cells)
5,0V
6,0V
7,0V
8,0V
9,0V
10,0V
Lead battery 6,0V (3 cells)
12,0V (6 cells)
5,2V
10,4V
Lithium-Ionen 7,2V (2 cells)
10,8V (3 cells)
5,0V
7,5V
Lithium-polymer (Lipo) 7,4V (2 cells)
11,1V (3 cells)
6,0V
9,0V
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!
If an overcurrent is detected, the additional sound „Sound at overcurrent“ is played (if
the slot is not empty) and the red LED on the sound module is also permanently
switched on.