Serial Port
Original instructions
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General
The BMXNOR0200H module has a built-in serial port supporting either serial communications via a serial link or modem communications via an external modem device.
The following table describes the serial communication channels:
Characteristic
Description
Protocols supported
RTU protocols:
  • IEC 60870-5-101
  • IEC 60870-5-104 (PPP/Modem)
  • DNP3 serial
  • DNP3 NET (PPP/Modem)
Connection
RJ45 female connector
Physical link
  • RS 485 non-insulated serial link
  • RS 232 non-insulated serial link
Pin Assignment
The following illustration shows the RJ45 serial port:
Pin
Signal
Pin
Signal
1
RXD
5
D0
2
TXD
6
CTS
3
RTS
7
Power supply
4
D1
8
Common
Shielding
The RJ45 connector has eight pins. The pins used differ according to the physical link used.
The pins used by the RS 232 serial link are as follows:
The pins used by the RS 485 serial link are as follows:
Pins 7 and 8 are dedicated to the power supply of the man-machine interface via the serial link:
NOTE: The RS 232 4-wire, RS 485 2-wire, and RS 485 2-wire and power supply cables use the same RJ45 male connector.