Interface Definition; Power Interface; Rs485 Interface - Ebyte E90-DTU User Manual

Ebyte wireless data transceiver

3. Interface definition

3.1. Power interface

Users can choose ⑥ DC power interface,using the power adapter supply with the interface of the 5.5mm outer diameter , 2.5mm
diameter ;
Also choose the VCC and GND terminal power supply, only choose any one of the power supply is OK;
E90-DTU can use 10 ~ 28V DC power supply, but it is recommended to use 12V or 24V DC power supply.
3.2. RS232 interface
The E90-DTU can be connected to the device via RS-232 using the standard DB-9 interface.

3.3. RS485 interface

E90-DTU can connect the 485_A terminal and 485_B terminal with the device RS-485 A terminal and B terminal.
Pin NO. Definition
1 VCC
2 GND
3 485_B
4 485_A
.
Function
Pressure line power interface, positive
Pressure line power interface, negative
RS-485 interface, interface B
RS-485 interface, interface A
Description
10 ~ 28V DC, recommended 12V or 24V
The power supply negative pole is connected to the system
ground and the housing
The RS-485 interface B is connected to the device interface B
The RS-485 interface A is connected to the device interface A
E90-DTU series user manual
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