LDARC ET V2 Series Instruction Manual page 5

Pin definition
CURRENT GND GND GND
PWM4 PWM3 PWM2 PWM1
5V(BUZZER+)
LED STRIP
BUZZER-
GND
S.BUS and PPM receiver connection
SBUS/PPM
iBUS receiver connection
iBUS etc.
BATTERY+
BATTERY+
BETAFLIGHT
USB
PPM+RX2-INV
Supply voltage is 5V
PPM or invert RX2 signal input
Supply voltage is 5V
NOT invert RX1 signal input
GND TX1
5V RX1
AUDIO
SIGNAL
CAM
GND
VCC
3V3
5V
GND
TX2-INV BATTERY+ RX2
RX2-INV 5V GND
DSM2 and DSMX receiver connection
DSM2/DSMX
-4-
BATTERY+ GND GND GND
BATTERY+ VIDEO AUDIO
GND TX1
5V RX1
BATTERY+ RX2
5V GND
Only KKT-F411(20x20)-90214
TX2
VIDEO
Supply voltage is 3.3V
NOT invert RX2 signal input
GND
5V
GND
TX1
TX2
VIDEO
version
TX1
RX1