User Manual
Table Of Contents
Chengdu Ebyte Electronic Technology Co.,Ltd
E32-DTU User Manual
6
4. Interface definition
4.1. Power supply Interface
You can select the
⑥
DC power adapter, which provides power with an external diameter of 5.5mm and an internal diameter of
2.5mm.
The VCC terminal and GND terminal in
②
can also be used for power supply, just select either of the power supply modes.
E32-dtus can use 8 to 28V DC power supplies. 12V or 24V DC power supplies are recommended.
4.2. RS232 interface definition
The E32-DTU can be connected to the device via RS-232 using a standard DB-9 interface.
4.3. RS485 Interface definition
The E32-DTU can connect terminals 485_A and 485_B in step 2 to terminals A and B of RS-485.
Pin
Standard
definition
Function
Description
1
VCC
Press-line power interface,
positive pole
Dc ranges from 8V to 28V. 12V or 24V is recommended
2
GND
Press-line power interface,
negative terminal
The negative terminal of the power supply is connected
with the system and the housing
3
485_B
RS-485 port, port B
RS-485 Port B Connects to port B on the device
4
485_A
RS-485 port, port A
RS-485 Port A Port A connects to port A of the device
▲ Note: Communication failure occurs when the radio station is connected to multiple devices, but does not occur when the radio
station is connected to a single device. Connect terminals 485_A and 485_B in parallel with 120Ω resistance.