Jeti SBEC 40 User manual

INSTRUCTION MANUAL
SWITCHING VOLTAGE REGULATOR
SBEC 40
Published by JETI model s.r.o 24.8.2012

Switching Voltage Regulator SBEC 40
-2-
CONTENTS
1. DESCRIPTION..........................................................................................................................................3
2. WIRING......................................................................................................................................................3
3. SETUP.........................................................................................................................................................3
4. INSTALLATION AND HEAT PROTECTION.....................................................................................4
5. TECHNICAL DATA OF THE SBEC-REGULATOR...........................................................................4
6. WARRANTY..............................................................................................................................................4

Switching Voltage Regulator SBEC 40
-3-
1. Description
The switching voltage regulator SBEC is supposed to act as a current supply for receivers and
servos. It makes possible to use a wide range of input voltages from 3S up to 10S Li-XX cells. Setup
of the output voltage between 5 and 8V is accomplished by a shorting plug jumper. This implies that
the SBEC is also prepared for use with new „higher“ voltage servos. The SBEC is due to its
maximum current of 40A suitable for medium and larger models.
2. Wiring
The switching voltage regulator SBEC comprises two battery input cables with cross-sections of
1.5mm2 as well as one pair of output servo cables with cross-sections of 2.5mm2 each. Three-wire
cable is connected to a magnetic switch for switching the regulator on. This switch is wired in a so
called „safety“ mode which ensures continuous function of the regulator even if soldering joints or
cables become mechanically damaged.
Wiring diagram of the regulator:
3. Setup
The output voltage is adjusted with the aid of a shorting plug (jumper) in steps of 5.0V, 5.5V,
6.0V, 7.0V and 8.0V. An important condition of keeping a correct output voltage in connection with
the jumper position is a sufficiently high supply voltage. The supply voltage of the battery must by
all means be higher than the required output voltage. We recommend a minimum difference of at
least 2V above the output voltage. Other ways the output voltage would decrease under load
conditions. The switched-on condition of the regulator and an information about the presence of
voltage at its output are signaled by a shining green LED.
Battery
Servos
Connection of
8–42V batteries
Adjustment of
output voltages
5.0, 5.5, 6.0, 7.0
and 8.0V
Adjusted
output voltages
Magnetic
switch

Switching Voltage Regulator SBEC 40
-4-
4. Installation and heat protection
The switching voltage regulator SBEC contains a heat protection means which prohibits
destruction of the regulator by long time effects of excessive current or by a short circuit. This
phenomena may, for instance, arise if a servo is short circuited or by an excessive output load. If the
heat protection is activated, the regulator „switches off“ for a short time necessary to cool down.
After cooling down the SBEC switches automatically on again. This affair is signaled by blinking of
the green LED. The blinking frequency of the LED depends on the amount of applied load. When the
heat protection is activated the output voltage decreases to several hundreds of mV.
In order to ensure a proper function of the regulator always take care of an sufficient amount
of cooling air through flow
5. Technical Data of the SBEC-Regulator
Technical Data:
Recommended input voltage
8 –51 V
Maximum input voltage
51 V
Maximum allowed amounts of cells
3-12 LiXX or 9-35 NiXX
Adjustable output voltage
5.0 / 5.5 / 6.0 / 7.0 / 8.0 V
Output pulse current
40 A (5s)
Switched-off current consumption
max. 85µA (at input voltage 42V)
Operation temperature
- 20°C till +85°C
Weight
100 g
Dimensions
80x36x25 mm
Table showing dependence of sustained current loads on input voltages
Number of Lixx Cells
3
4
5
6
7
8
9
10
11
12
Sustained Output-Current* [A]
18
17.5
17
16.5
16
15.5
15
14.5
14
13.5
* Sustained current values are valid only for operating conditions with sufficient cooling airflow
6. Warranty
For the product we grant a warranty of 24 months from the day of purchase under the assumption that
it has been operated in conformity with these instructions at recommended voltages and that it has not been
damaged mechanically. Warranty and post warranty service is provided by the manufacturer.
We wish you successful flying with the products of: JETI model s.r.o. Příbor, www.jetimodel.cz