The following processors have a built-in communication channel dedicated to serial communication, and support communication via a Modbus link:
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BMX P34 1000,
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BMX P34 2000,
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BMX P34 2010/20102,
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BMX P34 2020.
Introduction to the Serial Port
The following table describes the characteristics of the serial communication channels:.
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Characteristic
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Description
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Channel number
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Channel 0
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Protocols supported
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|
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Connection
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RJ45 female connector
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Physical link
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The following illustration shows the RJ45 serial port:
The following table shows the pin assignment of the serial port for the BMX P34 xxxxx processors:
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:
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Pin 1: RXD signal
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Pin 2: TXD signal
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Pin 3: RTS signal
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Pin 6: CTS signal
The pins used by the RS 485 serial link are as follows:
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Pin 4: D1 signal
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Pin 5: D0 signal
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 all use the same RJ45 male connector.
