User manual

DPSI RV Family Operating Instructions Version 2.1
page 7 of 44
Voltage Regulation:
Until now, the receiver set was supplied directly by the connected
battery (or a corresponding battery switch). The output voltage
depends heavily on the current discharge state. Because virtually
always 2-cell LiPo batteries are being used in large model airplanes, a
fully charged battery reaches up to 8.4 volts after the charger shuts off
(depending on the charging current and the internal resistance). This
peak voltage drops relatively fast, but can cause reduced lifetime of the
servos in unfavorable cases, because the manufacturers usually allow
only up to 6 volts.
The electronics of the DPSI RV systems make sure, that the voltage of
the batteries is reduced to an acceptable value, independent of the
provided input voltage of the batteries. Using a jumper (a small
connector), the output voltage can be adjusted in four steps (except for
the DPSI 2001 RV – here the voltage is fixed). Thus, the power
requirements can be adjusted to the pilots needs.
In order to allow for servos with higher voltages, the output voltage of
the DPSI RV Version 2010 can be adjusted in 4 steps up to 7.4 volts.
Hint:
In the DPSI RV system, receiver and servos are supplied with the same voltage
which is generated from several voltage regulators.
Low voltage warning:
To inform the user about the discharging state of his batteries, a
microcontroller using an intelligent algorism is integrated into the DPSI
RV systems, to monitor all voltages. Errors (e.g. battery voltage too
low) are unambiguously communicated through a built in buzzer
acoustically and in the switch transmitter by the central LED optically.
In order to allow for different battery types the DPSI RV can be set to
the used battery. Switching to different battery types is easily done by
simple programming.