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Chengdu Ebyte Electronic Technology Co., Ltd.
4.2.
RS485 interface definition
E78-DTU can use the 485_A terminal and 485_B terminal in ② to connect with the A terminal and B te
rminal of the RS-485 of the device respectively.
Foot nu
standard defin
mber
ition
1
VCC
2
GND
3
485_B
4
485_A
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Function
Crimp power interface, pos
itive
Crimp power interface, neg
ative pole
RS-485 interface, B interfa
ce
RS-485 interface, A interfa
ce
E78-DTU(470LN22) User Manual
illustrate
DC 8~ 28V, 12V or 24V is recommended
The negative pole of the power supply is co
nnected to the system ground and the shell
RS-485 interface B interface is connected wi
th device B interface
The RS-485 interface A interface is connecte
d to the device A interface
11
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