Interface Defination; Power Interface Definition; Rs232 Interface Definition; Rs485 Interface Definition - Ebyte E90-DTU User Manual

Chengdu Ebyte Electronic Technology Co,;Ltd

4. Interface Defination

4.1. Power interface definition

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.

4.2. RS232 Interface definition

The E90-DTU can be connected to the device via RS-232 using the standard DB-9 interface.

4.3. RS485 Interface definition

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
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Copyright ©2012–2019，
Function
Crimping power interface, positive
Crimping power interface, negative
RS-485 interface, interface B
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
E90-DTU (433C30) user manual
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