NOVAK XRS SPORT REVERSIBLE Manual
XR
XR
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XRS
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SPORT REVERSIBLE ESC
PRECAUTIONS
The XRS Sport
Reversible...the
perfect upgrade!
Designed with ultra-small surface
mount technology & loaded with
all the standard Novak features, the
XRS is the perfect upgrade.
Capable of handling 4-7 cells & motors
with as few as 15 turns, the Novak XRS is
a great upgrade for your 1/10th scale
touring sedan, off-road buggy, or just
about any sport application.
The 5V/1A B.E.C. handles most any servo with ease, and Radio
Priority Circuitry maintains steering control even after the battery
has discharged. Novak’s new Smart Braking II Circuitry gives
you full range of braking without going into reverse until you
shift it into reverse by returning the trigger to neutral...this provides
smoother take-offs in reverse and less wear on your drive train.
Polar Drive Technology keeps thing cool & improves radio
system performance. And of course, Novak’s original One-
Touch Set-Up means your new ESC is the easiest to program.
• WATER & ELECTRONICS DON’T MIX! Do not operate
model in or around water. Never allow water, moisture,
or other foreign materials to get inside the ESC.
• 15-TURN MOTOR LIMIT Use only motors with 15 turns
or higher. Using motors with fewer turns than 15 will cause
overheating and will void the warranty.
• 4 TO 7 CELLS ONLY Never use fewer than 4, or more
than 7 cells
(4.8-8.4 volts DC)
in the main battery pack.
• NO REVERSE VOLTAGE! Reverse battery polarity can
damage speed control––Disconnect battery immediately.
• NO SCHOTTKY DIODES Using external Schottky diodes
with reversible ESCs will damage ESC & void warranty.
• DISCONNECT BATTERIES WHEN NOT IN USE Always
disconnect battery from ESC when unattended or not in
use to avoid possible short circuits. Even if switch is off,
MOSFETs may fail & cause shorting of battery pack that
could result in fire or burning of ESC & surrounding objects.
• TURN TRANSMITTER ON FIRST Turn on transmitter
before ESC so you will have control of the radio equipment.
• INSULATE WIRES Always insulate exposed wiring with
heat shrink tubing or electrical tape to avoid short circuits.
STEP 1
CHANGING INPUT HARNESS
The XRS comes with the industry standard input harness
connector that works with all major radio brands. However,
with some older style receivers, the wiring sequence in the
plastic connector needs to be changed at the receiver-end
of the harness. This is important because the electronics in the
receiver may be damaged if the wiring sequence is incorrect.
Changing the sequence is easy to do, as described below.
JR • Hitec • New KO • Airtronics Z
JR, Hitec, Futaba, new KO, & Airtronics Z receivers do not
need to change the sequence of the ESC's input harness wires.
New Airtronics Z receivers have blue plastic cases, & new KO
cases have tabs on the input harness openings, as in Figure 1.
• Insert the input plug into the receiver with the BLACK
wire toward the outside edge of the receiver case.
Old-style KO • Old-style Sanwa/Airtronics
If your receiver is an older KO or Sanwa/Airtronics, you must
change the sequence of the ESC's input harness wires. Old
Sanwa/Airtronics cases are black in color. Old KO cases do
not have the tab openings, as in Figure 2 above.
• Interchange the red & black wires in the plug plastic of the
ESC's input harness at the receiver end as shown below.
• Insert the input plug into the receiver with the RED wire
toward the outside edge of the receiver case.
XRS SPECIFICATIONS
Input Voltage ............................... 4-7 cells
(1.2VDC/cell)
Motor Limit ................................. 15 turn
(@ 6 cells)
Battery/Motor Connectors ........... Tamiya/Bullet
Rated Current*
(fwd/rev) ..................
40 amps
On-Resistance* ............................ 0.0055 ohm
B.E.C. Voltage .............................. 5.0 volts DC
B.E.C. Current ............................. 1.0 amp
PWM Frequency .......................... 1000 Hertz
Protection .................................... Thermal Overload
Case Width .................................. 1.10 inch
(27.9mm)
Case Depth ................................. 1.31 inches
(33.3mm)
Case Height ................................. 0.53 inch
(13.5mm)
Weight ........................................ 1.27 ounce
(36.0 grams)
Part Number ............................... 1830
*
MOSFET rating @ 25
°
C
INSTRUCTION MANUAL
FIGURE 1
FIGURE 2
New KO (with tabs)
Old KO (no tabs)
tabs
no tabs
black
red
STEP 2
MOUNTING ELECTRONICS
1. DETERMINE BEST ESC MOUNTING LOCATION
Position ESC away from receiver & antenna as shown in
Set-Up photo
(on back)
. Choose a mounting position that
will keep the power wires from obstructing movement
of the vehicle’s suspension or the motor pod.
2. INSTALL SPEED CONTROL
Use the included double-sided tape to mount the ESC.
3. INSTALL ON/OFF SWITCH
Determine a convenient place to mount switch where it
will be easy to get to. Mount with double-sided tape.
4. INSTALL RECEIVER
Mount the receiver as far from the motor, power wires,
battery, and servo as possible. These components all emit
radio noise when the throttle is being applied. On graphite
or aluminum, place the receiver on edge with the crystal
and antenna as far above the chassis as possible.
Mount the antenna close to the receiver and trail any
excess wire off the top of the antenna.
STEP 3
CONNECTING ELECTRONICS
Refer to Set-Up photo on back
1. IMPORTANT NOTE ABOUT SCHOTTKY DIODES
•NO SCHOTTKY DIODES•
Schottky diodes must NOT be used with reversible ESCs.
Schottky use will damage ESC and void the warranty.
2. CONNECT SPEED CONTROL TO THE RECEIVER
After the input plug plastic has been properly wired to
match the receiver
(Refer to Step 1)
, plug the ESC’s input
harness into the THROTTLE CHANNEL of the receiver.
Note: The XRS comes with a user-replaceable input harness
that has the same connector on both ends. Should the harness
come unplugged from the ESC, insert the connector on the
end of the harness into the opening under the power wire
tabs with the WHITE wire toward the center of the ESC.
3. CONNECT SPEED CONTROL TO THE BATTERY PACK
Plug the WHITE Tamiya-style battery connector from
speed control into a 4 to 7 cell battery pack
(1.2 volts DC/cell)
.
4. CONNECT SPEED CONTROL TO THE MOTOR
Plug the bullet connector on the YELLOW wire from
speed control into the positive connector from the motor.
Plug the bullet connector on the BLUE wire from speed
control into the negative connector from the motor.
TIP: Twisting the motor wires once or twice as they go to the motor
can help reduce any radio noise emitted from the wires.
red
white
black
white
white wire
input
harness
opening