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Operating instructions
Version 08/09
Flight controller
Item no. 20 77 62
MC-20A
Item no. 20 77 63
MC-40A
Item no. 20 77 64
MC-60A
Intended Use
The flight controller is solely intended to be used for private model-making. It is connected to
a free channel for a remote control receiver for model aircrafts or model helicopters and is used
for smooth control of the rotational speed of an electric motor.
This product complies with the national and European statutory requirements. All included
corporate names and product descriptions are trademarks of the corresponding owner. All
rights reserved.
Safety instructions
The warranty will be void in the event of damage caused by failure to observe
these safety instructions! We will not assume any responsibility for any
consequential damage.
We do not accept any liability for personal injury or damage to property
caused by incorrect handling or failure to observe the safety instructions.
The warranty will be void in such cases.
• The unauthorised conversion and/or modification of the product is inadmissible because of
safety and approval reasons (CE). Do not dismantle the product, there are no parts to be
adjusted or maintained. Moreover this causes the warranty to become void!
• The product is not a toy and should be kept out of reach of children!
• Do not leave the packaging material carelessly lying around, as such materials can become
dangerous in the hands of children.
• Observe the correct polarity of the connecting cables when connecting the flight controller
to the flight accumulator. Use reverse polarity protected plugs since the flight controller will
be destroyed by the wrong polarity.
• Only operate the flight controller within admissible current and voltage limit values (see
section "Technical Data").
• The flight controller must not get damp or wet.
• Always disconnect the accumulator from the flight controller when not in use.
• Always turn on the sender first before connecting the flight controller to the accumulator!
• Prior to turning off the sender disconnect the flight controller from the accumulator.
• The flight controller can get very hot during operation. There is the severe danger of getting
burned! Ensure sufficient ventilation of the flight controller during operation.
• When handling accumulators, flight controllers and electric motors with propellers attached,
be sure never to bring any body parts or objects in the revolution and suction range of the
propellers.
• The current consumption of the connected motor must not exceed the maximum admissible
current value of flight controller.
• Only operate the flight controller via an accumulator pack, never via a power supply unit.
• Only connect one single electric motor to the flight controller.
• The flight controller is not suitable to operate with brushless electric motors with three
connections!
• Keep the maximum distance between receiver and flight controller during assembly in order
to avoid mutual interference.
• Do not lay the line of the antenna of the receiver parallel to the live wires.
• When operating the model ensure sufficient cooling of the flight controller and of the motor.
• Check the flight controller and the cables with the plug-in connection regularly for damages.
If you see that there is damage, do not operate the flight controller anymore.
• Before charging the accumulator, disconnect the flight controller.
• Handle the product with care. It can be damaged by impact, blows or by being dropped even
from a low height.
Connecting the flight controller
2
1 Accumulator connection line (red = plus/+, black = minus/-)
2 Receiver connection cable
3 Motor connection line
4 LED (position of the LED can vary to the depiction according to the item number)
The accumulator connection line (1) of the flight controller is equipped with "open" wire ends.
Depending on which plug-in system on the flight accumulator is used, you may reverse
polarity protected plugs to be soldered.
When assembling the plugs, observe the correct polarity without fail, since the flight
controller is going to be destroyed by the wrong polarity. The polarity of the
accumulator connection lines is marked with colours: red = plus (+) and black =
minus (-).
The two motor connection lines (3) also have open cable ends. Attach corresponding plugs
suitable for your motor (if necessary, insulate using shrink tubing).
Connect the flight controller to the motor and connect the 3-pole receiver connection cable (2)
to the receiver output relevant for the motor control. Also observe the provided documents for
the correct connection of servos and the drive/flight controllers.
Observer the correct arrangement of the plug at the connector of the receiver (black/brown line
= minus/-, red line = plus/+, white/orange line = impulse signal).
Important!
Since the flight controller disposes of a built-in BEC, no other power supply must be
connected to the receiver.
Commissioning of the flight controller
Secure the electric motor, and the whole model, respectively so that nothing can get
loose or move on full motor speed. Observe that the propeller or rotor shafts can
rotate freely. Remove loose items like paper, foil, cloths, clothing and other
lightweight materials to prevent them from being sucked in.
• Turn on the sender.
• Push the control stick for the motor control to the position "motor off".
• Connect the flight accumulator to the flight controller.
• The flight controller will make a few peep sounds ("do-re-mi-di"), idicating that the flight
controller is ready for operation.
• If you slowly move the control stick away from the "motor off" position and toward full throttle,
the motor will start running.
Reverse the polarity of the two motor connection lines (3), if the motor revolves in
the wrong direction. However, never reverse the accumulator connection lines!
• When in the "motor off" position the LED (4) flashes slowly. If the motor is running the LED
(4) is flashing fast; when in full throttle position the LED (4) is lit permanently.
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