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B+
A-
GND
1
2
3
485+
485-
RS485 device 1
RS485 interface
RS485 device 2
RS485 device 3
485+
485-
485+
485-
…
In order to prevent signal reflection and interference in RS485 multipoint communication, adding one
terminal resistor at the both farthest ends of the line is necessary, and the argument is 120Ω 1/2W.
Note:
There is no internal termination resistor in the RS485 interface of ENB-302MI.
2.3 Ethernet connection
Ethernet interface apply RJ-45 connector, 10/100M adaptive.
Summary of Contents for ENB-302MI
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