Ebyte E831-RTU User Manual page 8

Number
Port and
other
definitions
1 PE
2 GND
3 VCC
4 RS485-G
5 RS485-A
6 RS485-B
7 DI4
8 DI3
9 DIG
10 DI2
11 DI1
12 DIG
Function
Connection with the earth
Crimp type power supply
input negative pole
Voltage type power
supply input positive pole
RS485 Signal
reference ground
RS485 interface A
RS485 interface B
Digital input channel 4
Digital input channel 3
Digital input signal
reference ground
Digital input channel 2
Digital input channel 1
Digital input signal
reference ground
Illustr
ation
Connection with the earth
Power reference ground
Power input terminal，DC 8V~28V，
12V/24V is recommended
RS485 signal reference ground,
connection recommended
RS485 interface A is connected with
equipment A
RS485 interface B is connected with
equipment B
Form dry contact with DIG
Form dry contact with DIG
Digital input signal reference ground, used
with DI terminal
Form dry contact with DIG
Form dry contact with DIG
Digital input signal reference ground, used
with DI terminal