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⑮ RS232 port: Full-duplex serial port
⑯ RS485 port: Half-duplex serial port
⑰ Power supply interface: support 7.4v-24V input
5.4.2 V40 Receiver Installation and Connection
After the connection is completed, please refer to the following steps to check the
connection status. (This step may vary depending on the ground connection or
flight control)
1. TTL port and SBUS port connection sequence
TTL port
SBUS port
5V
5V
RX
TX
S
S
Air GND
GND Flight control
Air
+
+
Flight control
TX
RX
(or other device)
-
- (or other device)
2. RS232 port and RS485 port connection sequence
RS232 port
RS485 port
5V
5V
5V
5V
GND
GND
GND
GND
Air
TX
RX Flight control
Air
A
A
Flight control
RX
TX
(or other device)
B
B (or other device)
3.
With a stable 7.4-24V DC power supply, POWER indicator ON, indicates that
the transmitter is normally powered on; when the LINK indicator is always on, it
means the successful connection.
4. When the COM indicator is on, it means that the serial module starts normally,
and when the WORK indicator is on, it means that the self-test of the airborne
