Traxxas VXL-4s Instructions Download Page 1

VXL-4s Electronic Speed Control Instructions

Covers Part #3465

TRAXXAS.com

Traxxas, 6250 Traxxas Way, McKinney, TX 75070, Phone: 972-549-3000, Fax: 972-549-3011, e-mail: [email protected]

KC2701-R00   190927

*U.S. Customers Only

H I G H   O U T P U T

WARNING!  CAUTION!  DANGER!

FIRE HAZARD!

                                                                                               

The VXL-4s electronic speed control requires use of Lithium Polymer (LiPo) 
batteries with nominal voltage not to exceed 16.8 volts (3s/4s packs). 
Charging and discharging batteries has the potential for fire, explosion, 
serious injury, and property damage if not performed per the instructions. In 
addition, LiPo batteries pose a SEVERE risk of fire if not properly handled per 
the instructions and require special care and handling procedures for long 
life and safe operation. LiPo batteries are intended only for advanced users 
that are educated on the risks associated with LiPo battery use. Traxxas does 
not recommend that anyone under the age of 14 use or handle LiPo battery 
packs without the supervision of a knowledgeable and responsible adult. 
Dispose of used batteries according to the instructions.
•  LiPo batteries have a minimum safe discharge voltage threshold that should 

not be exceeded. The VXL-4s electronic speed control is equipped with built-in 
Low-Voltage Detection that alerts the driver when LiPo batteries have reached 
their minimum voltage (discharge) threshold. It is the driver’s responsibility to 
stop immediately to prevent the battery pack from being discharged below its 
safe minimum threshold.

•  Low-Voltage Detection is just one part of a comprehensive plan for safe LiPo 

battery use. It is critical to follow all instructions for safe and proper charging, 
use, and storage of LiPo batteries. Make sure you understand how to use 
your LiPo batteries. If you have questions about LiPo battery usage, please 
consult with your local hobby dealer or contact the battery manufacturer. As a 
reminder, all batteries should be recycled at the end of their useful life.

• A LiPo balance charger (such as the Traxxas EZ-Peak Live™, part #2971, sold 

separately) is required to charge the batteries. DO NOT use a charger designed 
for NiMH or NiCad batteries. The use of a NiMH or NiCad charger or charge 
mode will damage the batteries. Failure to use the correct charger may result in 
battery damage, fire, personal injury, and/or property damage. 

•  ALWAYS inspect your LiPo batteries carefully before charging. Do not use 

or charge battery packs that have been damaged in any way (bent, dented, 
swollen, torn covering, or otherwise damaged).

•  BEFORE you charge, ALWAYS confirm that the charger settings exactly match the 

type (chemistry), specification, and configuration of the battery to be charged. 
DO NOT exceed the maximum manufacturer recommended charge rate. DO NOT 
attempt to charge non-rechargeable batteries (explosion hazard), batteries that 
have an internal charge circuit or a protection circuit, or batteries that have been 
altered from original manufacturer configuration.

•  While charging or discharging, ALWAYS place the battery 

(all types of batteries) in a fire retardant/fire proof container  
and on a non-flammable surface such as concrete.

•  ALWAYS charge batteries in a well-ventilated area.
•  Charge the battery in a safe area away from flammable materials. Monitor 

the charging process and never leave batteries unattended while charging. 
Do not allow small children to charge or handle LiPo batteries.

•  DO NOT disassemble, crush, short circuit, or expose the batteries to flame or 

other source of ignition.

•  DO NOT let any exposed battery contacts or wires touch each other. This will 

cause the battery to short circuit and create the risk of fire.

•  DO NOT leave the charger and battery unattended while charging, 

discharging, or anytime the charger is ON with a battery connected. If 
there are any signs of a malfunction, unplug the power source and/or stop 
the charging process immediately. 

•  ALWAYS unplug the charger from the wall outlet and disconnect the battery 

when not in use.

•  Never charge LiPo battery packs in series or parallel. Charging packs in series 

or parallel may result in improper charger cell recognition and an improper 
charging rate that may lead to overcharging, cell imbalance, cell damage  
and fire. 

•  If a battery gets hot to the touch during the charging process (temperature 

greater than 110°F / 43°C), immediately disconnect the battery from the 
charger and discontinue charging.

•  DO NOT store or charge LiPo batteries with or around other batteries or battery 

packs of any type, including other LiPos.

•  Store and transport your LiPo batteries in a cool dry place. DO NOT store in direct 

sunlight. DO NOT allow the storage temperature to exceed 140°F or 60°C, such 
as in the trunk of a car, or the cells may be damaged and risk of fire created. 
ALWAYS store battery packs safely out of the reach of children and pets.

•  Keep a Class D fire extinguisher nearby in case of fire.
•  DO NOT disassemble LiPo batteries or cells. DO NOT disassemble the charger.
•  DO NOT attempt to build your own LiPo battery pack from loose cells.
•  REMOVE the battery from your model or device before charging.
•  DO NOT expose the charger to water or moisture.

Thank you for purchasing the Traxxas Velineon® VXL-4s 

electronic speed control. The Velineon VXL-4s forward/

reverse electronic speed control simplifies brushless 

technology with easy, built-in profiles and intuitive 

programming. The VXL-4s uses advanced circuit design 

that allows sensorless brushless motors to operate with 

the smoothness and precision of the best brushless 

systems. The VXL-4s comes with the peace-of-mind of the Traxxas Lifetime 

Electronics Warranty and unmatched Traxxas customer support. The VXL-4s is not 

a toy. It is a sophisticated electronic device capable of delivering large amounts of 

current. Children under 14 years of age require adult supervision for use of the  

VXL-4s. 

If you have questions or need assistance, call us at

 

1-888-TRAXXAS*.

Important Precautions

VXL-4s Speed Control

•  

Disconnect the Battery: 

Always disconnect the battery from the speed control 

when not in use. 

•  

Insulate the Wires:

 Always insulate exposed wiring with heat shrink tubing to 

prevent short circuits.

•  

Transmitter on First: 

Switch on your transmitter first before switching 

•  

Don’t Get Burned: 

The ESC and motor can become extremely hot during use, so 

be careful not to touch them until they cool. Supply adequate airflow for cooling.

•  

Use Traxxas High-Current Connectors: 

Do not change the battery and motor 

connectors. Improper wiring can cause fire or damage to the ESC. Please note 
that modified speed controls can be subject to a rewiring fee when returned  
for service.

•  

No Reverse Voltage:

 The ESC is not protected against reverse polarity voltage. 

•  

No Schottky Diodes: 

External Schottky diodes are not compatible with reversing 

speed controls. Using a Schottky diode with your speed control will damage the 
ESC and void the warranty.

•  

Always

 adhere to the minimum and maximum limitations of the speed control as 

stated in the specifications. 

Specifications:

Input voltage ...................................................................................3s/4s LiPo (max. 16.8 volts)

Supported motors ......................................................................................Sensorless brushless

Battery connectors..............................................................Traxxas High-Current Connector

Motor connectors......................................................................TRX 6.5mm bullet connectors

Motor/battery wiring ............................................................................ 10-gauge Maxx® Cable

Thermal protection .........................................................................2-stage thermal shutdown

Case size (l/w/h) ...................................... 59.4mm (2.34”)/ 71.5mm (2.81”)/ 49mm (1.93”)

Weight ............................................................................................................................. 201g (7.1oz)

Profile Selection:

Profile #1 (Sport Mode): 100% Forward, 100% Brakes, 100% Reverse

Profile #2 (Race Mode): 100% Forward, 100% Brakes, No Reverse

Profile #3 (Training Mode): 50% Forward, 100% Brakes, 50% Reverse

Summary of Contents for VXL-4s

Page 1: ...ger and battery unattended while charging discharging or anytime the charger is ON with a battery connected If there are any signs of a malfunction unplug the power source and or stop the charging process immediately ALWAYS unplug the charger from the wall outlet and disconnect the battery when not in use Never charge LiPo battery packs in series or parallel Charging packs in series or parallel ma...

Page 2: ...se refer to the manufacturer s wiring diagrams that came with your receiver On the VXL 4s the red wire is positive the black wire is negative and the white wire is the control wire WARNING On some older Airtronics radio systems the positive and negative terminals are opposite of the VXL 4s and an adapter is required Crossing the red and black wires could damage the receiver and the VXL 4s Study th...

Page 3: ... fully charged battery is connected Voltage LED V Slow Blinking Red The VXL 4s has entered Low Voltage Protection Stage 2 When the battery voltage attempts to fall below the minimum threshold the VXL 4s will automatically shut down fail safe mode The LED on the speed control will slowly blink red indicating a low voltage shutdown Stop driving the model The VXL 4s will stay in this mode until a ful...

Page 4: ...lem to Traxxas 6250 Traxxas Way McKinney TX 75070 If the component is found to be defective it will be repaired or replaced at no charge The warranty does not cover damage caused by the following Allowing foreign material to enter speed control or get onto PC board Using other than 3s 4s LiPo max 16 8 volts input voltage Removing the stock battery connectors Using the same gender connectors on the...

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