BEIER-Electronic SFR-1 - Function Sequences; Voltage Monitoring

GB Sound speed controller SFR-1
44 BEIER-Electronic 06.02.2019
Function sequences
All functions that can be triggered with the sound module (see page 24) can be
compiled to a special function sequence with defined order and time for each step.
More information can be found in this manual starting on page 83.
Voltage monitoring
The connected supply voltage at X1/A+ and X1/A- is measured permanently. If the
voltage drops below an adjustable value for longer than ten 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 two 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
Battery voltage
Threshold for
charging battery
Threshold for
voltage
monitoring
Nickel-cadmium
and
nickel-metallhydrid
6,0 V (5 cells)
7,2 V (6 cells)
8,4 V (7 cells)
9,6 V (8 cells)
10,8 V (9 cells)
12,0 V (10 cells)
13,2 V (10 cells)
14,4 V (12 cells)
15,6 V (13 cells)
16,8 V (14 cells)
5,2 V
6,2 V
7,2 V
8,2 V
9,2 V
10,2 V
11,2 V
12,2 V
13,2 V
14,2 V
5,0 V
6,0 V
7,0 V
8,0 V
9,0 V
10,0 V
11,0 V
12,0 V
13,0 V
14,0 V
Lead battery
6,0 V (3 cells)
12,0 V (6 cells)
5,2 V
10,4 V
5,0 V
10,0 V
Lithium-Ionen
7,2 V (2 cells)
10,8 V (3 cells)
5,2 V
7,7 V
5,0 V
7,5 V
Lithium-polymer (Lipo)
7,4 V (2 cells)
6,6 V
6,4 V