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E-MAXX

COMBO

ROOSTER E-Maxx COMBO

The ROOSTERS are the long standing benchmark in reliable
reversible speed controls for 6-7cell/mild-modified set-ups.
With two Roosters installed in your Traxxas E-Maxx using
the included Input Signal Y-Harness, the Rooster E-Maxx
Combo lets you hop-up your E-Maxx with the ability to

run standard 7.2V 

(05 & 075 size)

 motors

 

(stock Traxxas

motors not recommended)

. You also get the added benefit of

brakes before the engagement of reverse, and the Roosters
feature Novak’s 

Smart Braking Circuitry

TM

 that brings

the model to a slow speed before hitting reverse to save
your vehicle’s gearbox and reduce speed control heating.
These speed controls feature the original One-Touch Set-Up

(There’s nothing easier!)

, exclusive 

Polar Drive Technology

TM

for the smoothest throttle response and improved radio
system performance, and 

Reverse Disable Circuitry

TM

that locks-out reverse for racing or forward only use.
Other features include built-in 

brake light circuitry

 to

power two high-intensity LEDs for enhanced realism
(available separately in the Novak Brake Light LED Kit
#5655), 

Radio Priority Circuitry

TM

 to maintain steering

control even after the battery has discharged, and 

dual-

level thermal protection

.

SPECIFICATIONS

Input Voltage 

(1.2VDC/cell)

6-7 cells

Case Width

1.63 inches

Case Depth

2.02 inches

Case Height 

(w/h.sinks)

1.22 inches

Weight 

(w/heat sinks)

3.00 ounces

On-Resist.–Fwd. 

(@Trans)

0.018 

On-Resist.–Rev. 

(@Trans)

0.018 

Rated Current–Fwd.

100 amps

Rated Current–Rev.

100 amps

Braking Current

100 amps

Rev. Delay 

(after Smart Braking)

Zero Sec.

BEC Voltage

5.0 volts DC

BEC Current

1.0 amp

Power Wire

16G / 6”

Signal Harness

26G / 6”

Transistor Type

MEGAFET

PWM Frequency

1250 Hertz

Motor Limit

Mild Modified*

Part Number

1855

*14 turn motors with available Traxxas E-Maxx gear ratios

STEP 1

CHANGING THE INPUT HARNESS

PRECAUTIONS

QUICK SET-UP

FOR DETAILED INFO. REFER TO STEPS 1 THRU 6

A.

INSTALL SPEED CONTROLS

Use double-sided tape to mount ESCs in the rear tub of
E-Maxx. For more details refer to Step 2.

B.

CONNECT SPEED CONTROLS TO RECEIVER

Plug input signal harnesses of each ESC into the double
side of the Y-Harness. Plug single side of the Y-Harness
into the throttle channel of receiver. If not using stock
E-Maxx receiver, make sure ESC signal harness has
proper wiring sequence. Refer to Step 1 to change wiring.

C.

CONNECT SPEED CONTROLS TO BATTERIES

Plug the JST/Tamiya connector from the first ESC into
one of the battery packs (6-7 cell @ 1.2 volts DC/cell).
Plug the second ESC into the other battery pack.

We found that connecting the left side ESC to the right side
motor & battery in the truck keeps excess wire to a minimum,
and you won’t have to tie wrap the wires to keep them
inside the truck and away from moving parts.

D.

TURN ON TRANSMITTER POWER

Refer to Step 5 for transmitter adjustments.

E.

TURN ON SPEED CONTROLS

Slide 

ON/OFF

 switches to the 

ON

 positions.

F.

PRESS AND HOLD 

ESC 1’s

 ONE-TOUCH BUTTON

With the transmitter throttle in 

neutral

 position, press

and hold the 

One-Touch

 button on the first speed control

until the status 

LED

 turns solid red

, then release.

G.

PULL THROTTLE TO FULL-FORWARD POSITION

Hold until status 

LED

 turns solid green

.

H.

PUSH THROTTLE TO FULL-REVERSE POSITION

Hold until status 

LED 

blinks green

, then return throttle

to 

neutral

 position. LED will then turn solid red indicating

proper programming and throttle is in neutral position.

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.

• USE NEUTRALLY TIMED MOTORS

  Using motors with

other than 0

°

 timing will draw excess current in reverse,

and result in ESC overheating and premature motor wear.
Modified motors 

(with adjustable end bells)

 timed to 0

°

 or

Johnson/Mabuchi 

(closed end bell)

 motors are recommended

• 6 or 7 CELLS ONLY

  Never use fewer than 6 or more than

7 cells (7.2-8.4 volts DC) in each main battery pack.

• MOTOR CAPACITORS REQUIRED

    Three 0.1

µ

F (50V)

ceramic capacitors (included) must be properly installed
on every motor to prevent radio interference.

• ALWAYS USE HEAT SINKS  

Four heat sinks are factory-

installed on each Rooster, and must be used for maximum
cooling and performance.

• NO REVERSE VOLTAGE!

    Reverse battery polarity can

damage speed control––Disconnect battery immediately.

• NO SCHOTTKY DIODES  

External Schottky diodes must

NOT

 be used with reversible speed controls. Using an

external Schottky diode will damage the ESC.

• DON’T LET TRANSISTOR TABS TOUCH

  Never allow

separate transistor banks to touch each other or any exposed
metal. This will create a short circuit and damage the ESC.

• DISCONNECT THE BATTERIES

  Always disconnect the

battery pack from the speed control when not in use.

• TRANSMITTER ON FIRST

  Turn on your transmitter before

the ESCs so you will have control of the radio equipment.

• DON’T GET BURNT

!

  Transistor tabs and the heat sinks

can get extremely hot, so be careful not to touch them
until they cool. Supply adequate air flow for cooling.

• INSULATE WIRES

  Always insulate exposed wiring with

heat shrink tubing to prevent short circuits.

Part #1855

OPERATING INSTRUCTIONS

The Rooster speed controls come with the industry standard
input harness connector. This connector works with all
major radio brands. However, with some older style
receivers the sequence of the wires in the plastic connector
housing needs to be changed. 

This is an important step,

because the electronics inside the receiver may be damaged
if the wiring sequence is incorrect.

 Changing the wiring is

easily accomplished as described below.

JR • Hitec • New KO • Airtronics Z

If your receiver is a JR, Hitec, Futaba, new KO, or an
Airtronics Z (blue case) you do not need to change the
sequence of the ESC's input harness wires. 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 (See Figure 2).

• Interchange the red and black wires

 in the plug plastic

of the ESC's input harness as shown in Figure 3 below.

• Insert the input plug into the receiver with the 

RED wire

toward the outside edge

 of the receiver case.

FIGURE 3

  With a small standard screwdriver, gently lift

the plastic prong until the wire and metal socket easily
slides out of the plastic housing. Repeat for each wire.

FIGURE 1

FIGURE 2

New KO (with tabs)

Old KO (no tabs)

tabs

no tabs

black

wires

red

wires

white

wires

black

wires

white

wires

red

wires

+ +

I.

PRESS AND HOLD 

ESC 2’s

 ONE-TOUCH BUTTON

With the transmitter throttle in 

neutral

 position, press

and hold the 

One-Touch

 button on the second ESC

until the status 

LED

 turns solid red

, then release.

J.

PULL THROTTLE TO FULL-FORWARD POSITION

Hold until status 

LED

 turns solid green

.

K.

PUSH THROTTLE TO FULL-REVERSE POSITION

Hold until status 

LED 

blinks green

, then return throttle

to 

neutral

 position. LED will then turn solid red indicating

proper programming and throttle is in neutral position.

L.

CONNECT SPEED CONTROLS TO THE MOTORS

Use 7.2V (05 or 075 size) standard R/C motors

with 14 turns** or higher in the Traxxas E-Maxx.

Turn off speed controls then transmitter.
Plug the bullet connector on the 

YELLOW

 wire of the

first speed control to 

positive

 of the first motor.

Plug the bullet connector on the 

BLUE

 wire of the first

speed control to 

negative

 of the first motor.

Plug the bullet connector on the 

YELLOW

 wire of the

second speed control to 

positive

 of the second motor.

Plug the bullet connector on the 

BLUE

 wire of the second

speed control to 

negative

 of the second motor.

Again, we found that connecting the left side ESC to the
right side motor & battery in the truck works best.

M.

KICK-UP A ROOST!

Turn on transmitter and then the speed controls.

**Rooster motor specification is 16 turns or higher (mild modified).
14 turns can be used with E-Maxx using available Traxxas gear ratios.

G/J.

H/K.

L.

C.

blue

wire

yellow

wire

black

wires

red

wires

brake

light

wires

blue
wire

yellow

wire

twist motor

wires to reduce

RF noise

trail excess

wire off top of
antenna mast

three 0.1

µ

F

capacitors

•NO SCHOTTKY•

(+)

(-)

C.

F.

B.

E.

I.

Y-Harness

(-)

(+)

(+)

(-)

(+)

(-)

L.

A.

CONNECTION PHOTO

E-MAXX INSTALLATION PHOTO

6-7 Cell Battery Pack

6-7 Cell Battery Pack

input

signal

harnass

ON/OFF
switches

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