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ADJUSTING THE ELECTRONIC SPEED CONTROL
BL-2s™ Battery Settings (Low-Voltage Detection Setting)
The BL-2s electronic speed control is equipped with built-in Low-Voltage Detection.
The Low-Voltage Detection circuitry constantly monitors the battery voltage. When
the battery voltage begins to reach the minimum recommended discharge voltage
threshold for LiPo battery packs, the BL-2s will limit the power output to 50% throttle.
When the battery voltage attempts to fall below the minimum threshold, the BL-2s
will shut down all motor output. The LED on the speed control will slowly blink red,
indicating a low-voltage shutdown. The BL-2s will stay in this mode until a fully
charged battery is connected.
When you turn your model on, the BL-2s speed control's status LED will glow green,
indicating that Low-Voltage Detection is activated to prevent over-discharging of
LiPo batteries. LiPo batteries are intended only for the most advanced users that
are educated on the risks associated with LiPo battery use.
WARNING: FIRE HAZARD!
Do not use LiPo batteries in this vehicle with Low-Voltage
Detection disabled.
To verify the Low-Voltage Detection setting:
1. Turn on the transmitter (with the throttle at neutral).
2. Connect a fully charged battery pack to the BL-2s.
3. Press and release the EZ-Set button to turn the BL-2s on. If the LED is solid red,
then the Low-Voltage Detection is DISABLED (not safe to use LiPo batteries). If
the LED is solid green, then Low-Voltage Detection is ACTIVATED.
To activate Low-Voltage Detection (LiPo setting):
1. Make sure the LED on the BL-2s is on and red.
2. Press and hold the EZ-Set button for ten seconds. The
LED will turn off and then light green. Also, a "rising"
musical tone will be emitted from the motor.
3. Low-Voltage Detection is now ACTIVATED.
To disable Low-Voltage Detection (NiMH setting):
1. Make sure the LED on the BL-2s is on and green.
2. Press and hold the EZ-Set button for ten seconds. The
LED will turn off and then light red. Also, a "falling"
musical tone will be emitted from the motor.
3. Low-Voltage Detection is now DISABLED.
Transmitter Adjustments for the BL-2s ESC
Before attempting to program your BL-2s ESC, it is important to make sure that
your transmitter is properly adjusted (set back to the factory defaults). Otherwise,
you may not get the best performance from your speed control.
The transmitter should be adjusted as follows:
If the transmitter settings have been adjusted, reset them to the factory defaults.
1. Turn the transmitter off.
2. Hold both MENU and SET.
3. Turn the transmitter on.
4. Release MENU and SET. The transmitter LED will blink red.
5. Press SET to clear settings. The LED will turn solid green and the transmitter is
restored to default.
BL-2s Setup Programming (Calibrating your ESC and transmitter)
Read through all of the programming steps before you begin. If
you get lost during programming or receive unexpected results,
simply unplug the battery, wait a few seconds, plug the battery
back in, and start over.
1. Connect a fully charged battery pack to the BL-2s.
2. Turn on the transmitter (with the throttle at neutral).
3. Press and hold the EZ-Set button (A). The LED will first
turn green and then red. Release the EZ-Set button.
4. When the LED blinks RED ONCE, pull the throttle
trigger to the full throttle position and hold it there (B).
5. When the LED blinks RED TWICE, push the throttle
trigger to the full reverse and hold it there (C).
6. When the LED blinks GREEN ONCE, programming is
complete. The LED will then shine green or red (depending on
Low-Voltage Detection setting), indicating the BL-2s is on and at
neutral (D).
BL-2s Operation
To operate the speed control and test programming, place the vehicle on a stable
block or stand so that all of the drive wheels are off the ground. Disconnect the
motor wires (see page 12). This will ensure the motor does not drive the wheels
during testing. Do not test programming without disconnecting the motor wires.
Note that in steps 1-7 below, Low-Voltage Detection is ACTIVATED (factory default)
and the LED shines green. If Low-Voltage Detection is DISABLED, the LED will shine
red instead of green in steps 1-7 below. Never use LiPo batteries while Low-Voltage
Detection is disabled.
1. With the transmitter on, press and release the EZ-Set button. The LED will shine
green. This turns the BL-2s on.
2. Apply forward throttle. The LED will turn off until full throttle power is reached.
At full throttle, the LED will illuminate green.
3. Move the trigger forward to apply the brakes. Note that braking control is fully
proportional. The LED will turn off until full braking power is reached. At full
brakes, the LED will illuminate green.
4. Return the throttle trigger to neutral. The LED will shine green.
5. Move the throttle trigger forward again to engage reverse (Profile #1).
The LED will turn off. Once full reverse power is reached, the LED
will illuminate green.
6. To stop, return the throttle trigger to neutral. Note that there is a programmed
delay when changing from reverse to forward. This prevents damage to the
transmission on high-traction surfaces.
7. To turn the BL-2s off, press the EZ-Set button until the LED turns
off (.5 seconds).
BL-2s Specifications
Input voltage:
4.8-8.4V (6 to 7 cells
NiMH or 2s LiPo)
A
Supported Motors:
Sensorless brushless
Motor limit:
Green then Red
3300kV
B
Continuous current:
50A
Peak current :
Once Red
300A
C
BEC voltage:
6.0V DC
Twice Red
Transistor type:
D
MOSFET
Battery connector:
Traxxas High-Current
Once Green
Connector
Motor connectors:
Amass MT30-F connectors
Motor Wiring:
16-gauge cable
Battery Wiring:
14-gauge cable
Thermal Protection:
2-stage thermal shutdown
TRAXXAS • 19
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