Ebyte E95-DTU, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co.,Ltd. E95-DTU(900SLxx-485) User Manual
Copyright ©2012–2022
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
2.2 Communication interface description
The E95-DTU (900SLxx-485) can be connected to the device through RS485 using the terminal block.
number
standard
definition
function explanation
1 G signal ground Anti-interference, grounding
2 A RS485 bus A interface
The RS485 interface A interface is connected to
the device A interface
3 B RS485 bus B interface
RS485 interface B interface is connected to
device B interface
4 TX RS232 bus TX interface
The RS232 interface TX interface is connected
to the device RX interface
5 RX RS232 bus RX interface
The RS232 interface RX interface is connected
to the device TX interface
Note: When the radio is connected with multiple devices, the communication is not smooth, but there is no such
phenomenon when a single device is connected. Please try to connect a 120Ω resistor in parallel between the
485_A terminal and the 485_B terminal.
3.Technical indicators
3.1 Model Specifications
Model Specifications
Frequency Power Distance
Specifications
Recommended
application scenarios
MHz dBm km
E95-DTU(900SL22-4
85) 850.125
～
930.125
22 5
New generation
LoRa spread
spectrum, DC
long-distance,
interference-prone
environments.