Pro Boat JR XR3i - Manual (Page 10)

10
Your R-135 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-135 Receiver
R-135
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-135 Receiver
Third Channel
(Optional)
R-135
Z270/Z590M Servo
ESC
To Motor
Third channel
(Optional)
Receiver/Servo Connections and Installation
4680 JR XR3i manual 7/17/02 12:14 PM Page 10