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JRRacing XR2i User Manual

JRRacing XR2i
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10
Receiver/Servo Connections and Installation
Your R-125 receiver is equipped with Battery
Eliminator Circuitry (BEC). The receiver gets its
power from the model’s Ni-Cd battery pack, thus
saving the weight of an additional receiver battery.
Ni-Cd batteries from 4.8–8.4V (4–7 cells) can be
used safely. Higher voltage packs may damage the
receiver and servos.
Note: When using a separate receiver Ni-Cd as a
power source, the operating voltage range is
4.8–6.0V (4- to 5-cell).
Attention: Make sure the male and female connectors
have the correct polarity (+/-) before connecting. The
servo lead and receiver case are molded so that the
lead can only be inserted correctly. Be sure to orient
the servo plug correctly for proper insertion.
You may use a separate receiver battery to power
the receiver (such as for some electric boats or in
gas-powered vehicles). A Ni-Cd pack plugged into
the battery socket on your receiver will operate your
receiver. You can also use alkaline batteries with the
included battery box.
If you use a mechanical speed controller, please
make sure it has the correct connector for a BEC
system (red connector). See Figure A below for a
typical setup. Most electronic speed controllers are
set up for BEC operation and plug directly into your
receiver (Figure B). See Figure B for a typical setup
and check your speed controller‘s manual for
correct installation.
B
E
C
B
E
C
Figure A – Connections to BEC receiver with mechanical speed controller. Ni-Cd battery and speed controller
are not included in the radio set.
Figure B – Connections to BEC receiver with electronic speed controller. Ni-Cd battery and speed controller
are not included in the radio set.
To Resistors
Mechanical
Speed Control
BEC Connector
Switch
R-125 Receiver
R-125
Z270/Z590M Servos
To Motor
Battery Box
(for use with optional separate
receiver battery power)
7.2V–8.4V Battery
7.2–8.4V Battery
R-125 Receiver
Third Channel
(Optional)
R-125
Z270/Z590M Servo
ESC
To Motor
Third channel
(Optional)
5189 JR XR-2i manual 9/18/02 12:01 PM Page 10

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JRRacing XR2i Specifications

General IconGeneral
BrandJRRacing
ModelXR2i
CategoryTwo-Way Radio
LanguageEnglish