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Speed Controller MULTIcont X-08 # 7 2270
These operating instructions are an integral part of the product,
and contain important information and safety notes. They should
therefore be kept accessible at all times, and must be passed on
to the new owner if you ever dispose of the product.
1. Specification
MULTIcont X-08 # 7 2270
Cell count battery voltage 5-10 / ~4,7 – 15 V
Continuous current (with good cooling) 8 A (max. 11A)
Pulse frequency ~ 6 kHz
Receiver power supply (BEC):
BEC voltage 5 V
BEC current max. 1 A
Dissipated power of BEC regulator max. 11 W
( with 8 cells max 5 W)
Dimensions (w/o wires) 10x21x6 mm
Weight without / with wires 2/17 g
2. Safety Notes
• Read the instructions before using the unit
• Avoid heat build-up: Do not restrict air circulation
• Do not connect the flight battery with reversed polarity:
Connecting a battery incorrectly immediately wrecks the
controller.
For this reason: • red wire to POSITIVE (+) terminal,
• black wire to NEGATIVE (-) terminal
We recommend to use the green MPX-plugs # 85213/85214 for
ESC/Battery and Motor/ESC as long as the motor is not soldered to
the motor directly.
• When soldering or otherwise working on the motor or
controller:
Always disconnect the battery first (short-circuit / injury
hazard)
• Please note when running or test-running the power system:
Do not run the motor holding it in your hand; secure the model well.
Check that there is space all round for the propeller to rotate. Remove
any objects (clothing, small items, paper, etc.) from the vicinity of
the propeller which could be sucked into it or blown away by it. Never
stand in front of, or in line with the rotational plane of the propeller
(injury hazard).
3. Special Characteristics
• BEC with low-voltage cut-off (recommended up to max.8 cells)
with automatic cell count detection
• Power-on guard: the controller stays in the disarmed state when
you connect the flight battery. The motor cannot be switched on until
you first move the throttle stick briefly to the idle position.
• Overload-/overheat-protection: When the temperature rises, the
voltage rises also. When the voltage is to high, the controller will
switch off the motor and the LED will flash. To activate the motor
again, the battery must be disconnected from the controller and
connected again.
• Over-Cell-protection – The controller will switch off at 16V
4. Mounting the controller on the motor
Note: in most cases soldering is required to install the controller.
Soldering calls for a certain amount of care, as the correct operation
and reliability of the power system are dependent upon these joints.
• Use only cored solder designed for electronic soldering
• Do not use an acid-based soldering flux
• Parts to be soldered must be heated to the correct temperature,
but must not be overheated
• If you have not soldered before, ask an experienced modeller
for help.
1. Motor suppression: if the motor you wish to use is not
suppressed as standard, we strongly recommend the use of the
suppressor set # 8 5020, to avoid potential problems with
interference to the receiving system.
2. Solder the motor leads attached to the controller to the
motor Solder the motor power leads these wires to the drive
motor terminals as follows:
Generally with direct-drive motors: yellow
Æ “+” ; blue Æ “-“
3. Check the direction of motor rotation
If the direction of rotation is not correct (e.g. when using a geared
motor), correct this by swapping over the leads at the motor
terminals (re-solder the joints).
5. Using the power system for the first time
1. Connect the receiver lead on the controller (REC) to the receiver.
With MPX RC-systems: channel 4 = throttle/motor
2. If you own a programmable transmitter:
set servo travel for throttle / motor to 100% on both sides.
3. Move the throttle stick (
and the associated trim slider) fully to the
desired idle /motor STOP position.
4. Switch on the transmitter
5. Connect the flight battery to the speed controller
Caution: reverse polarity will wreck the controller instantly!
If the LED flashs, the controller is in power-on guard mode.
Æ Disconnect the flight battery from the controller, reverse the throttle
channel at the transmitter (servo reverse) and connect the flight battery
again
Æ Ready.
Important:
• Always switch transmitter ON first, then connect the flight
battery. If you now see the LED flashing, the controller is in
power-on guard mode.
Æ Move the throttle stick to idle Æ the
controller is ready for use!
• First disconnect the flight battery from the controller, then
switch the transmitter OFF.
6. BEC =
Battery Eliminating Circuit
BEC means: receiver and servos draw current from the flight battery.
Do not use a separate receiver battery.
Note: please remember that the BEC system of the MULTIcont X-08
can only supply its maximum 1 A current briefly. In practice this means:
With 7 cells Connect not more than 3, with 8 cells not more than 2
servos to the receiver! Don’t use BEC with more than 8 cells!
Servo current drain varies according to the power class of the servos,
the frequency of control commands, and the freedom of movement of
the control surface linkages (!). If you cannot measure the BEC current:
Carry out a check “on the ground” by operating the servos constantly
until the low-voltage cut-off is triggered (= flat flight battery). At this point
the speed controller should be no more than warm to the touch, and the
servos should operate correctly during the entire period.
If your model is fitted with more servos than the controller can cope
with, the BEC power supply must be disabled and a separate receiver
battery used. This is done by locating the red (+) wire in the receiver
lead attached to the controller, and cutting it through.
7. Low battery cut-off
The low battery cut-off of the MULTIcont X-08 is designed to switch off
the motor when the flight battery is almost discharged. This ensures
that there is still sufficient energy in the pack to power the BEC system
for a safe landing. When the battery is nearly flat, you will also notice
the motor’s power output (propeller speed) declining rapidly. This is the
time to start preparing for the landing approach.
When voltage less 4.7 V is reached than the controller switches off the
motor. The power system can be switched on again for a brief period if
required by moving the throttle stick momentarily to the idle / motor
STOP position.
GB