Chengdu Ebyte Electronic Technology Co., Ltd.
Copyright2012–20231
ChengduEbyteElectronicTechnologyCo,;Ltd
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4. Interface definition
4.1 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 users can choose the VCC and GND terminal power supply from
②
, both are optional;
8~28V DC power supply,
i
t is recommended to use 12V or 24V DC power supply for E90-DTU.
4.2 RS232
The E90-DTU can be connected to the device via RS-232 using the standard DB-9 interface.
4.3 RS485
E90-DTU can be connected to the 485_A terminal and 485_B terminal from
②
with the RS-485 A terminal and B
terminal of other device respectively.
Pin NO.
Definition
Function
Description
1
VCC
Crimping power interface,
positive
8~28V DC, recommended 12V or 24V
2
GND
Crimping power interface,
negative
The power supply negative pole is connected to the
system ground and the housing
3
485_B
RS-485 interface, interface B
The RS-485 interface B is connected to the device
interface B
4
485_A
RS-485 interface, interface A
The RS-485 interface A is connected to the device
