9. AppendicesVlinx MESR9xx Modbus Gateway

Serial Interface Specifications

Mode Selection

RS-232/422/485 software selectable

 

 

RS-232 lines

TXD, RXD, RTS, CTS, DTR, DSR, DCD, GND

 

 

RS-422 lines

TXDA(-), TXDB(+), RXDA(-), RXDB(+), GND

 

 

RS-485 lines (2 wire)

Data(-), Data(+), GND

 

 

RS-485 lines (4 wire)

TXDA(-), TXDB(+), RXDA(-), RXDB(+), GND

 

 

 

75, 150, 300, 600, 1200, 2400, 4800, 7200,

Baud Rates

9600, 14400, 19200, 28800, 38400, 57600,

 

115200, 230400

Data Bits

5, 6, 7, 8

 

 

Parity

None, even, odd, mark, space

 

 

Stop bits

1, 1.5, 2

 

 

Flow control

None, RTS/CTS, XON/XOFF

 

 

RS-422/485 biasing

Auto 4.7K ohm pullups and pulldowns

 

 

RS-422/485 termination

Auto termination with thru hole resistor (user

supplied)

 

RS-485 data control

Auto control via MCU

 

 

Page 45

Manual Documentation Number MESR9xx-4508m

 

www.bb-elec.com/

 

www.bb-europe.com/

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B&B Electronics MESR9xx manual Serial Interface Specifications

MESR9xx specifications

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