6
Ch4 rudder servo
(or Ch1 aileron)
Optional:
Ch1 external
aileron servo
Ch2 elevator servo
Optional:
Ch3 brushless ESC
Optional:
Ch3 brushed motor
Input for 1S LiPo
battery with micro
connector
S
Plug Polarity
+–
S
Plug Polarity
+–
● NEVER allow water, moisture or foreign objects into the Tx/charger.
● NEVER leave the room where a battery is being charged.
● NEVER place the Tx/charger or battery on a fl ammable surface or near a
fl ammable object during the charge process. Keep away from carpets, cluttered
workbenches, etc.
● ALWAYS have a “class D” fi re extinguisher available when handling LiPo batteries.
● If a LiPo cell leaks fl uid, do not get fl uid on the skin, in the eyes or mouth, etc. If
you make contact with fl uid from a LiPo battery, rinse the affected area well with
water and seek immediate medical care.
TR421 4CH Rx CONTROL BOARD
The optional TR421 4-Channel Rx Control Board integrates a Tactic 2.4GHz receiver,
two linear actuation servos, and a 3A brushed ESC onto one device. Sockets are
mounted on the board for connection of an optional servo actuator such as the
Tactic TSX21 Linear Servo Actuator (TACM0021), and an external brushless ESC.
BIND THE RECEIVER TO THE TRANSMITTER
If included with the TTX402, the TR421 Rx will auto-bind with the transmitter once
powered. This bind ensures sole communication between the two, and prevents
other transmitters from controlling your model. If it’s necessary to re-bind the board
to the transmitter:
1. Switch on the Tx.
2. Connect the battery to the Rx Control Board. Only use single cell, 3.7V LiPo
batteries with a micro connector with the TR421 Rx Control Board. See SERVOS
AND ACCESSORIES on page 12 for recommendations.
3. The Rx LED on the bottom side of the board will turn on, indicating the Rx is
bound to the Tx.
4. Test for proper Tx / Rx functionality in the next section. If the system did not
become properly binded, repeat steps 1-3 above.
TACJ2402 Mnl.indd 6TACJ2402 Mnl.indd 6 4/20/2011 9:51:27 AM4/20/2011 9:51:27 AM
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