8
MSC 12RB 12T Fwd/Rev ESC
Features
• High power FET control with proportional forward and reverse.
• High frequency design delivers smooth speed transition.
• Thermal Overload Protection prevents damage due to over-
current conditions.
• Pre-wired with Tamiya-style battery plug and bullet-style
motor connectors.
• Designed to operate with stock motors (12 turns or higher).
• Push-button programming makes setup a breeze.
Connecting the Battery
The MSC 12RB comes pre-wired with a Tamiya-style connector,
compatible with most battery packs. Use battery packs from 4-cell
(4.8-volt) to 6-cell (7.2-volt) sub-C size battery packs.
1. Be sure the on/off switch is in the “off” position.
2. Connect a fully charged battery pack to the speed control
’
s battery
connector.
Selecting Forward Only or
Forward/Reverse Mode
The MSC 12RB has 2 modes: Forward Only mode and Foward
and Reverse mode. The Forward Only mode can be selected for
racing purposes. When the ESC is powered on, the LED will flash
for 2 seconds; the color of the LED indicates which mode the
ESC is operating in:
Forward and Reverse Mode–the Green LED will flash
Forward Only Mode–the Red LED will flash.
To change modes, push the set button and turn on the ESC. The
LED will flash, indicating the new mode has been selected. Note
the color of the LED to determine the mode of your ESC.
Adjusting the Transmitter
1. Set the “throttle reversing” switch to the NORMAL position.
2. Set the “throttle trim” to the CENTER position.
Speed Control Programming
NOTE: While in the programming mode, no power is
applied to the motor.
1. Turn on the transmitter
’
s power switch. (Be sure the transmitter
batteries are fully charged).
2. Turn the ESC switch on.
3. Press and release the setup button. The red and green LEDs
will light.
4. Move the throttle to the full throttle position and press the
programming button. The green LED will remain lit and the red
LED will go out. (If the ESC does not sense throttle movement
in 3 seconds by the transmitter, it will exit the programming
mode and you will have to begin again.)
5. Now move the throttle to full reverse and press the
programming button. The red LED will glow and the green
LED will go out.
6. Return the throttle to neutral and press the programming
button. The green LED will glow and the red LED will go out,
indicating programming is complete.
During normal operation, the green LED indicates neutral and the
red LED indicates full forward and full reverse.
Troubleshooting Guide
Symptom
Solution
Steering servo operates but the motor does not run
Programming is not complete. Reprogram the ESC by following the programming instructions.
Speed control connected to receiver incorrectly.
Motor defective. Test motor independently, repair or replace as needed.
Low batteries. Charge as needed.
Overload Protection enabled. Check motor and connections.
Steering and motor do not function
Receiver wired incorrectly. Check polarity and orientation of control plugs.
Batteries discharged. Recharge or replace.
Full speed not attainable
Transmitter adjusted improperly.
ESC programmed incorrectly. Reprogram.
Motor slows but will not stop
Throttle trim may be set improperly.
ESC program does not match transmitter.
Reprogram ESC.
Reduced radio range/interference
Motor capacitors broken/missing. Repair or replace.
Motor noise. Move receiver further away from ESC, motor and wiring.
Transmitter batteries low. Replace batteries.
Operation....................................... Proportional forward,
proportional reverse with
braking delay
Input
V
oltage ..................................4-cell (4.8 volts) to
6-cell (7.2 volts) DC
Peak Current .................................. 900 amperes
Continuous Current ........................ 46 amperes
Full-On Resistance ......................... 0.0014 ohms
Frequency ...................................... 2kHz
BEC output ..................................... 4.8V DC, 1 amp max
Overload Protection........................ Thermal
Dimensions .................................... 1.25 x 1.02 x .888 in
(38.6mm x 26.2mm x
22.5mm)
Weight ............................................ 1.2 oz (34 g)
