Traxxas VXL-4s - User Manual

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: support@Traxxas.com
KC2701-R00 190927
*U.S. Customers Only
HIGH OUTPUT
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:
Prole #1 (Sport Mode): 100% Forward, 100% Brakes, 100% Reverse
Prole #2 (Race Mode): 100% Forward, 100% Brakes, No Reverse
Prole #3 (Training Mode): 50% Forward, 100% Brakes, 50% Reverse

Summary

FIRE HAZARD!

LiPo Battery Usage Guidelines

Critical warnings for LiPo battery handling, charging, and storage for safety. Requires adult supervision for users under 14.

General LiPo Safety Precautions

Essential safety measures for charging, discharging, and storing LiPo batteries to prevent hazards.

Important Precautions

VXL-4 s Speed Control Handling

Key handling and installation advice for the VXL-4s speed control and connected components.

Low Voltage Detection

LVD Explanation

Explanation of the VXL-4s's two-stage Low Voltage Detection system for LiPo batteries.

VXL-4 s Setup Programming

Calibrating ESC and Transmitter

Step-by-step guide to calibrate the VXL-4s ESC with your transmitter.

VXL-4 s Profile Selection

Profile Descriptions

Details on the three available profiles: Sport, Race, and Training modes.

Selecting Drive Modes

Sport Mode (Profile #1)

Race Mode (Profile #2)

Training Mode (Profile #3)

LED Codes and Protection Modes

Protection Mode Explanations

Explanation of LED indicators for Overcurrent, Low Voltage, Overvoltage, and Thermal Shutdown.

Troubleshooting Guide

Steering Works, Motor Does Not Run

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The Traxxas Velineon VXL-4s Electronic Speed Control is a sophisticated electronic device designed to manage the power delivery to a brushless motor in remote-controlled vehicles. Its primary function is to simplify brushless technology, offering easy, built-in profiles and intuitive programming for an enhanced user experience. The VXL-4s is capable of controlling sensorless brushless motors, automatically detecting the motor type and incorporating numerous safeguards to prevent damage from miswiring or damaged wiring.

Function Description:

The VXL-4s acts as the brain of the vehicle's power system, translating commands from the transmitter into precise motor control. It supports 3s/4s LiPo battery power (up to 16.8 volts) and is equipped with a two-stage Low Voltage Detection system. This crucial feature monitors battery voltage and alerts the driver when LiPo batteries reach their minimum safe discharge threshold, first by limiting power output to 50% throttle (Stage 1) and then by stopping the vehicle (Stage 2) to prevent over-discharge and potential battery damage. The VXL-4s also includes advanced circuit design to ensure smooth and precise operation of sensorless brushless motors. It features a cooling fan to assist in maintaining optimal operating temperatures, particularly in high-current motor applications, thereby extending the lifespan of the battery, motor, and speed control. The device is designed to be compatible with most aftermarket receivers, allowing for broad integration into various RC setups. It also includes an accessory power panel for powering optional accessories like LED light kits or additional cooling fans.

Usage Features:

The VXL-4s offers three distinct user-selectable profiles to cater to different driving styles and conditions:

• Profile #1 (Sport Mode): Provides 100% Forward, 100% Brakes, and 100% Reverse, offering a balanced experience for general use.
• Profile #2 (Race Mode): Offers 100% Forward and 100% Brakes but disables Reverse, ideal for racing environments where reverse is not permitted or desired.
• Profile #3 (Training Mode): Limits power to 50% Forward, 100% Brakes, and 50% Reverse, making it suitable for new drivers or for practicing in confined spaces.

Programming the VXL-4s is intuitive, utilizing a single EZ-Set button for calibration with the transmitter and for selecting profiles. The device provides clear LED feedback during setup and operation, indicating power-on status, low-voltage detection, and various protection modes. For instance, a solid green LED indicates power-on with Low-Voltage Detection activated, while blinking red LEDs signify different stages of programming or protection.

The VXL-4s is designed for ease of installation, fitting directly into most Traxxas models or being mounted with double-sided servo tape. Proper installation involves ensuring adequate airflow for cooling, protecting the unit from crash damage, dirt, and debris, and positioning it for easy access to plugs and the EZ-Set button. Wiring is simplified with auto-detection for sensorless brushless motors, and the device uses Traxxas High-Current Connectors, which are engineered for optimal power flow, minimal resistance, and secure, long-lasting connections. Users are advised to use LiPo battery packs with high discharge rates and low-resistance assembly techniques for best performance.

Maintenance Features:

The VXL-4s incorporates several protection modes to safeguard the electronics and ensure longevity:

• Overcurrent Protection (Stage 1 & 2): Limits power output or shuts down the vehicle if excessive current flow is detected, caused by improper gearing, drivetrain restrictions, or a stuck model. Users are advised to inspect the vehicle for damage or obstructions and ensure proper gearing.
• Low Voltage Protection (Stage 1 & 2): As mentioned, this feature limits power or shuts down the vehicle to prevent over-discharge of LiPo batteries. Users must stop driving and recharge the batteries when alerted.
• Overvoltage Protection: Engages a fail-safe mode if the input voltage from connected battery packs is too high, preventing potential damage to the ESC. Users should disconnect the battery and confirm its voltage.
• Thermal Shutdown Protection (Stage 1 & 2): Limits power or shuts down the vehicle if overheating occurs due to excessive current flow. Users should inspect the cooling fan, allow the power system to cool, and check for proper gearing or driving conditions (e.g., deep sand, heavy mud, tall grass).

In case of a critical functioning error or programming error, the VXL-4s will indicate this with specific LED patterns, requiring users to contact Traxxas Customer Service. Regular inspection of the cooling fan is recommended to ensure it is operating correctly. The device is built with durability in mind, but users are cautioned against disassembling the case, tampering with internal electronics, incorrect wiring, or exposing it to water or moisture, as these actions can void the warranty and potentially damage the unit. Always disconnect the battery from the speed control when not in use and insulate exposed wiring to prevent short circuits.

Traxxas VXL-4s Specifications

General

BEC Voltage	6.0 V
Thermal Protection	Yes
Low Voltage Detection	Yes
Connectors	Traxxas High-Current Connector
Motor Limit	Brushless
Wire Gauge	12 AWG
Cooling	Fan
Input Voltage	11.1-14.8V (3S-4S LiPo)
Weight	120g