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Operating instructions
Version 01/09
Electronic Drive Control Unit
Order No. 20 69 63
Intended use
This product is connected to a receiver for model vehicle radio remote controls. This product serves as a
proportional speed control for an electric motor powering a model vehicle.
This product complies with the applicable national and European specifications. All company names and
product designations contained herein are trademarks of the respective owners. All rights reserved.
Contents
• Drive Control Unit
• Operating Instructions
Safety Instructions
The guarantee will be void if damage is incurred resulting from non-compliance with
the operating instructions! We do not accept any liability for consequential damages!
Nor do we assume liability for damage to property or personal injury caused by
improper use or the failure to observe the safety instructions! In such cases the
guarantee is voided.
• The unauthorized conversion and/or modification of the product is prohibited for safety and approval
reasons (CE). Never cut the cable/plug from the drive control unit, this will cause the warranty to be void.
• The product is not a toy and should be kept out of the reach of children!
• The product should not be allowed to become damp or wet.
• Do not short-out the connecting cable, as this would damage the cruise control. The same applies for
an overload (e.g. through the use of an inappropriate motor) or if the polarity is incorrect. Never attach
a Schottky diode to the motor. Only use an electric motor with interference suppression. Connect only
one single electric motor to the drive control unit.
• Unclamp the battery from the drive control unit when it is not in use. If the drive control unit is not used
for brief period, it can be deactivated using the On/Off switch.
• Always turn on the transmitter first before connecting the drive control unit with the battery and switching
it on!
• Before turning off the transmitter, turn off the drive control unit and, if necessary, separate it from the
rechargeable battery.
• The drive control unit is designed for NiMH/NiCd rechargeable batteries (6-7 cells). It can also be used
with 2-cell LiPo rechargeable battery packs, however in this case there is no low voltage safety
shutdown. In the event that a LiPo-battery pack is operated with the drive control unit, the LiPo-battery
pack will be damaged if itr becomes fully discharged!
• The cooling element can become very hot during operation, risk of burns!
• Handle the product carefully, it can be damaged by impacts, being struck or by falling even from a low
height.
• Do not leave the packaging material lying around carelessly, as such materials can become dangerous
toys in the hands of children.
Installation
Install the drive control unit with double-sided scotch tape (or with a Velcro), as far from the receiver as
possible. The power cable to the engine and to the rechargeable battery as well as the thin control cables
must be installed far from the aerial cable; also (the aerial cable should run directly from the receiver to the
aerial fitting). Otherwise the model may malfunction or the radio range may be reduced.
Operating the drive control unit without a cooling element is not allowed (if the element is supplied
unattached, it must be connected before operation). Check there is sufficient cooling for the drive control
unit!
The cables must not be able to get into moving parts, secure them with cable fasteners. The cooling fins
must not be covered.
Connection
• Connect the two thick motor connection cables to your motor. If the rotation direction of the engine is not
correct at a later point in time, swap over the two cables and set the servo reverse correctly on the remote
control.
• Connect the three-pole plug on your receiver. Make absolutely sure you have the correct receiver
configuration (see operation instructions for receiver as well as the instructions printed on the receiver).
Yellow/white/orange cable: Control signal
Red cable:
Operating voltage
Brown/black cable:
Earth
• As the drive control unit has a BEC, no receiver battery or rechargeable receiver battery may be used!
The motor's rechargeable battery supplies the receiver directly with power via the drive control unit.
• Install the On/Off switch of the drive control unit in the car; place the switch in the "OFF" position.
Putting the Vehicle into Operation
• Turn on you transmitter (check the status of the battery or the rechargeable battery!) Place the trim
regulator in the centre position; place the throttle lever in the neutral position.
• The switch drive control unit switch must be set to the "OFF" position.
• Insert the rechargeable battery pack in the car and connect it to the drive control unit.
Attention!
Position the model car so the drive wheels do not make contact with the ground or other
objects. Do not touch the drive mechanism, do not block it. Risk of injury!
Once the control cruise is switched on, the drive could be started immediately as a result
of the position of the throttle lever or the trim regulator on the transmitter, the wheels start
turning immediately.
• Release the gas lever or move it into the neutral setting. Move the trimmer for the Gas/Brake into the
middle position. Don't move the gas lever any more.
• First switch off the drive control unit (switch to the "ON" position).
• The drive control unit or the motor emits a short beep and then a confirmation tone ("DO-RE-MI"), the
neutral setting is then saved, the LED is lit green.
• The drive control unit is now ready for operation, you can steer the vehicle via remote control.
Please note:
When changing between forwards and reverse, the throttle must be put briefly into the neutral
position (approx. 2 seconds).
If the speed lever is shifted directly from forwards to reverse, the drive control unit's brake will
be activated (the vehicle will NOT go backwards!)
• The LED is lit green in the neutral position; it flashes rapidly when driving forwards and slowly when
travelling backwards. If the LED is lit permanently whilst driving forwards, the end setting has been
reached (i.e. full acceleration).
If the transmitter signal is interrupted, the drive control unit switches off the motor for safety
reasons (the steering servo will twitch, however, if no Fail-Safe is installed).
The same applies if the drive control unit overheats. In this case, check the drive conversion
and/or the motor type.
Ending Operation
• First switch off the control unit (bring switch into the "OFF" position).
• Separate the rechargeable battery from the drive control unit.
• Switch off the transmitter.
Disposal
Please dispose of the unserviceable device according to the current statutory requirements.
Technical Data
Cell number NiCd/NiMH: .......... 6 or 7 (7.2V / 8.4V)
Cell number LiPo: ..................... 2 (7.4V), but there is no integrated LiPo low voltage protection!
BEC: .......................................... 5V=, 1.5A
Steady current (forwards): ........ 5 minutes/70A, 30 seconds/80A, 1 second/106A
Motor limit: ................................. 15 turns (6 cells), 17 turns (7 cells)
Pulse frequency: ....................... 1kHz
Battery connection: ................... Tamiya-compatible
Receiver connection: ................ JR
Functions: .................................. Proportional forwards, break, proportional reverse
Weight: ...................................... approx. 53.5g (with cables and cooling element)
Dimensions (L x W x H) ............ Ca. 36 x 35 x 31mm (with cooling element)
These operating instructions are a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1,
D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming,
or the capture in electronic data processing systems require the prior written approval by the editor.
Reprinting, also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in
technology and equipment reserved.
© Copyright 2009 by Conrad Electronic SE.
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