JETI model MAX BEC User manual

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
®
User manual
EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
1. Introduction ..................................................................................... 3 EN
2. Linear voltage regulator ............................................................... 5 EN
2.1 Single BEC .................................................................................. 5 EN
2.1.1 Parameters Single BEC .................................................. 6 EN
2.2. MAX BEC .................................................................................... 6 EN
2.2.1 Parameters MAX BEC ..................................................... 7 EN
2.3 MAX BEC2 .................................................................................. 7 EN
2.3.1 Output voltage setting and LED function ................. 7 EN
2.3.2 Wiring ............................................................................... 8 EN
2.3.3 Switch ............................................................................... 8 EN
2.3.4 Parameters MAX BEC2 ................................................... 9 EN
2.4 MAX BEC 2D plus .................................................................... 10 EN
2.4.1 Output voltage setting and LED function ............... 10 EN
2.4.2 Wiring ............................................................................. 10 EN
2.4.3 Switch - Magnetic switch ............................................ 11 EN
2.4.4 Switch - RC switch ....................................................... 11 EN
2.4.5 Connection of MAX BEC 2D Plus telemetry to the
Duplex receiver .............................................................. 12 EN
2.4.6 Parameters MAX BEC 2D plus .................................... 13 EN
3. Switching regulators ................................................................... 14 EN
3.1 SBEC ......................................................................................... 14 EN
3.1.1 Output voltage setting ............................................... 14 EN
2 EN

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
3.1.2 Wiring ............................................................................ 14 EN
3.1.3 Switch ............................................................................. 14 EN
3.1.4 Heat protection ............................................................ 14 EN
3.1.5 Parameters SBEC .......................................................... 15 EN
3.2 SBEC 30D ................................................................................. 16 EN
3.2.1 Output voltage setting ............................................... 16 EN
3.2.2 Wiring ............................................................................ 16 EN
3.2.3 Switch - Magnetic switch ............................................ 16 EN
3.2.4 Switch - RC switch ........................................................ 17 EN
3.2.5 Heat protection ............................................................ 18 EN
3.2.6 Setup .............................................................................. 18 EN
3.2.6.1 Configuration via JETIBOX ............................ 18 EN
Alternative functions logical input ............... 20 EN
3.2.6.2 Configuration via the DC/DS transmitter .... 21 EN
3.2.7 Parameters SBEC 30D ................................................. 24 EN
4. Warranty ......................................................................................... 25 EN
3 EN

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MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
1 Introduction English
The MAX BEC / SBEC voltage regulator is designed to
power the on-board system in the model (receiver
and servo power supply), which uses LiXX cells to
power it. The regulator ensures that the power supply
to the servos is constant at all times and the result is
the same speed of movement of the servos,
regardless of the state of discharge of the power cells.
The switched regulator (SBEC) offers the possibility of
connecting the input voltage in a wide range, from 2S
up to 15S Li-XX cells.
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
4 EN

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
2.1 Single BEC2.1 Single BEC2.1 Single BEC
Single BEC is a linear regulator to provide power for a standard
servo with a maximum input voltage of 6V. The Single BEC can also
be used to provide power for the control units of helicopters or
multicopters.
SingleBEC has a fixed output voltage of 5.5V. It is therefore designed
for servos 4,8 - 6V. The SingleBEC contains an internal, resettable
fuse which protects against short circuit and overload. If a short
circuit or overload occurs, the output voltage decreases to zero
until the short circuit or overload is removed.
Its great advantage is that it allows the use of standard servos in
systems designed for the so-called High-Voltage servos (8,4V). Its
internal filtering improves the quality of the output voltage for the
servo.
The small size and low weight of the SingleBEC allows for very
simple installation in all parts of the plane. Due to its performance
parameters the Single BEC is suitable for the category of micro and
mini servos with load strengths up to 25 kg/cm at 6V.
2 Linear voltage regulator
OUTOUTOUT
INININ
SINGLE BECSINGLE BECSINGLE BEC
wit h Rese t tab l e fus e
SERVO
Accu
5 EN
FIG. 1: Example of Single BEC connection

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
2.1.1 Parameters Single BEC:
Dimensions : 19x9,3x6,6 mm
Weight : 5 g
Recommended input voltage : 5,5 - 8,4 V
Input voltage max: 24 V
Output voltage : 5,5 V
Sustained current : 1 A
Peak current : 15 A
2.2 MAX BEC2.2 MAX BEC2.2 MAX BEC
MAX BEC can be supplied either by NiXX or LiXX cells,
recommended is 2 LiXX cells or 5-6 NiXX cells. Input voltage is
indicated by four LEDs. If the input voltage is above 7.0 V, all three
green LEDs are ON. While the cells are gradually discharging,
particular LEDs go OFF depending on input voltage (lower then 7 V,
6.7 V, 6.45 V). If the input voltage is under 6.5 V, the red LED goes ON
indicating that cells are discharged (if using 2S LiXX then it means
that voltage of particular cells is under 3.25 V). Output voltage is
extracted from output side with 2 links. It is recommended to
connect both 2-links, it results in higher reliability and lower current
loading on connectors.
Switch
Receivers
ACCU
MAXMAX
BECBEC
MAX
BEC
2 LiXX
5-6 NiXX
IN OUT
10A
+
-
+
-
+
6 EN
FIG. 2: Example of MAX BEC connection

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
2.2.1 Parameters MAX BEC:
Dimensions : 50x25x10 mm
Weight : 28 g
Recommended input voltage : 5.5 - 8.4 V
Input voltage max. : 16 V
Output voltage : 5.0 V / 5.4 V / 5.7 V / 6.0 V
Peak current (max. 30s): 12 A
Sustained current : 5 A
Input voltage
(number of cell)
Output voltage [V]
5 V
5.4 V
5.7 V
6 V
Sustained current [A]
2 Lixx / 6 NiXX
2.92 A
3.50 A
4.12 A
5.00 A
3 LiXX / 10 NiXX
1.15 A
1.23 A
1.30 A
1.37 A
12 NiXX
0.85 A
0.90 A
0.93 A
0.97 A
2.3 MAX BEC22.3 MAX BEC22.3 MAX BEC2
2.3.1 Output voltage setting and LED function
By means of the provided shorting plugs (jumpers) the requested
output voltage of the regulator can be adjusted in steps of 5.0 V, 5.4
V, 5.7 V and 6.0 V. The MAX BEC 2 supply can consist of LiXX or NiXX
cells. For this purpose we recommend application of 2 LiXX cells or
5-6 NiXX cells. The supply battery voltage is indicated by four LEDs
(1x red and 3x green). In case of a voltage higher than 7.0 V all three
green diodes are ON, during discharge of the cells their voltage will
gradually decrese and the particular LEDs will turn off one by one
according to the input voltage decrease, i. e. when the voltages
become lower than 7 V, 6.7 V and 6.5 V. If the input voltage becomes
lower than 6.5 V the red LED lights up indicating discharged
cells.This shows in case of 2S LiXX batteries that the voltage per cell
decreased below 3.25 V.
7 EN

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
2.3.2 Wiring
The supply batteries should be connected by cables of a cross
section of at least 1.5 mm to the terminals of the MAX BEC 2 marked
ACCU 1 and 2. The MAX BEC 2 regulator allows connection of two
supply batteries. The LED-diode indicates whether the current is
drawn from battery 1 or from battery 2. The decision about which
battery has to deliver energy depends upon battery voltage, as a
rule the battery with higher voltage is delivering current (if the
voltage of both batteries is equal current is drawn from both of
them and LEDs of batteries 1 and 2 are ON). There exists no energy
exchange between the batteries if the voltages of both batteries
are different, therefore both batteries may be of different
capacities, cell numbers and types. If only one supply battery is
used for the MAX BEC 2, it may be connected either to input ACCU 1
or ACCU 2.
2.3.3 Switch
The regulator MAX BEC 2 contains an electronic switch for
switching it on or off. The switch is a so called „safe“ switch
(REMOVE BEFORE FLIGHT), in case of mechanical damage of
solder joints or cables the BEC-function stays unimpaired.
Notice:
In order to ensure a correct function of the MAX BEC sufficient
cooling air should be directed along the cooling fins.
8 EN

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
OUT 20A
>7.0V
>6.7V
>6.5V
<6.5V
ACCU 1 ACCU 2
®
MAX BEC 2MAX BEC 2MAX BEC 2
VOLTAGE REGULATOR
2 LiXX, 5-6 NiXX
input voltage indicator
ACCU 1ACCU 1ACCU 1
ACCU 2ACCU 2ACCU 2
output voltage
selection
REMOVE BEFORE FLIGHT
LEDindicator for input voltage
Pins for jumper selection of output voltage
Output MPX connector
Electronic switch
LED Accu 1/2
Power input
Accu 1/2
2.3.4 Parameters MAX BEC 2
Dimensions : 100x29x16 mm
Weight : 85 g
Recommended input voltage : 5.5 - 8.4 V
Input voltage max. : 16 V
Output voltage : 5.0 V / 5.4 V
/ 5.7 V / 6.0 V
Peak current (max. 30s): 20 A
Sustained current : 12 A
Input voltage
(number of
cells)
Input voltage [V]
5 V
5.4 V
5.7 V
6 V
Sustained current [A]
2 Lixx / 6 NiXX
8.33 A
10.00 A
11.76 A
12.00 A
3 LiXX / 10 NiXX
3.28 A
3.51 A
3.70 A
3.92 A
12 NiXX
2.44 A
2.56 A
3.70 A
3.92 A
9 EN
FIG. 3: Example of MAX BEC 2 connection

EN
MAX BEC / SBECMAX BEC / SBECMAX BEC / SBEC
2.4 MAX BEC 2D plus2.4 MAX BEC 2D plus2.4 MAX BEC 2D plus
2.4.1 Output voltage setting and LED function
By means of the provided shorting plug (jumper) the requested
output voltage of the regulator can be adjusted in steps of 5.0 V, 5.4
V, 5.7 V and 6.0 V. Output voltage can be also set by the JETIBOX,
overriding the physical position of the shorting plug (jumper). The
MAX BEC 2D Plus supply can consist of LiXX or NiXX cells. For this
purpose we recommend application of 2 LiXX cells or 5-6 NiXX cells.
The supply battery voltage is indicated by four LEDs (1x red and 3x
green). In case of a voltage higher than 7.0 V all three green diodes
are ON, during discharge of the cells their voltage will gradually
decrese and the particular LEDs will turn off one by one according
to the input voltage decrease, i. e. when the voltages become lower
than 7 V, 6.7 V and 6.5 V. If the input voltage becomes lower than 6.5
V the red LED lights up indicating discharged cells.This shows in
case of 2S LiXX batteries that the voltage per cell decreased below
3.25 V.
2.4.2 Wiring
The supply batteries should be connected by cables of a cross
section of at least 1.5 mm to the terminals of the MAX BEC 2D Plus
marked ACCU A and B. The MAX BEC 2D Plus regulator allows
connection of two supply batteries. The LED-diode indicates
whether the current is drawn from battery A or from battery B. The
decision about which battery has to deliver energy depends upon
battery voltage, as a rule the battery with higher voltage is
delivering current (if the voltage of both batteries is equal current is
drawn from both of them and LEDs of batteries A and B are ON).
There exists no energy exchange between the batteries if the
voltages of both batteries are different, therefore both batteries
may be of different capacities, cell numbers and types. If only one
supply battery is used for the MAX BEC 2D Plus, it may be connected
either to input ACCU A or ACCU B.
10 EN