Ebyte E800-DTU V8 Series, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co.,Ltd E800-DTU(433Lxx-485)-V8 UserManual
Copyright ©2012–2022
，
Chengdu Ebyte Electronic Technology Co.,Ltd
6
4. Interface definition
4.1.
Power supply
Users can choose
①
the VCC and GND terminal power supply, E800-DTU can use 8~ 28V DC power supply,
but it is recommended to use 12V or 24V DC power supply.
4.2.
RS485 interface
E800-DTU can use the 485_A terminal and the 485_B terminal in
②
to connect the A terminal and the B terminal of the RS-485
of the device respectively.
Pin NO. Definition Function Description
1 VCC
Screwing power interface,
positive
8 ~ 28V DC, 12V or 24V( recommended )
2 GND
Screwing power interface,
negative
The power supply negative pole is connected to
the system ground and the housing
3 GNDA RS232 common terminal Connected to RS 232 device GND
4 B/TXD Serial port terminal
RS-485: Connected to RS 485 device interface
B
RS-232: Output terminal,connected to RS 232
device RXD
5 A/RXD Serial port terminal
RS-485: Connected to RS 485 device interface
A
RS-232: Input terminal, connected to RS 232
device TXD
Note: The DTU will be in poor communication when connecting multiple devices , while connecting a single