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9
Pin
Signal Description
S1
TXD+
，
Transmit Data+, Output
S2
TXD-
，
Transmit Data-, Output
S3
RXD+
，
Receive Data+, Input
S4
Bi-directional Data+
S5
Bi-directional Data-
S6
RXD-
，
Receive Data-, Input
S7
Bi-directional Data+
S8
Bi-directional Data-
3.4.3 RS-232/RS-485 interface
ENB-302MT support standard RS485 and RS232 interfaces.
RS232 interface:
Pin
Signal Description
1
TX, connect with RX of user device
2
RX, connect with TX of user device
3
GND
RS485 interface:
Pin
Signal Description
1
B+
，
RS485
2
A-
，
RS485
3
GND
The RS-485 interface of ENB-302MT is standard, and the RS-485 characteristics of the product are shown
B+
A-
GND
1
2
3
TX
RX
GND
1
2
3
Summary of Contents for ENB-302MT
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