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Chapter 2 – DFI HD332-H81 User Manual

Page 17

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17

Chapter 2 Hardware Installation

Chapter 2

COM 10 RS232/422/485 Select

JP18

JP2, JP17 and JP18 are used to configure the COM port 10 to RS232, RS422 (Full Duplex) or

RS485.

The pin functions of the COM port 10 will vary according to these jumpers’ setting.

Note:

When COM 10 RS232/422/485 is selected, JP17 and JP18 must be set in accordance

to JP2.

6

4

2

5

3

1

6

4

2

5

3

1

JP2

5-6 On: RS485

6

4

2

5

3

1

1-2 On: RS232

(default)

3-4 On: RS422

Full Duplex

6

4

2

5

3

1

6

4

2

5

3

1

JP17 and JP18

1-3, 2-4 On:

RS232 (default)

3-5, 4-6 On:

RS422 Full Duplex/RS485

RS232

RXD

DCD-

TXD

DTR-

GND

DSR-

RTS-

CTS-

RI-

RS422

Full Duplex

RXD-

RXD+

TXD+

TXD-

NC.

NC.

NC.

NC.

NC.

RS485

DATA-

DATA+

NC.

NC.

NC.

NC.

NC.

NC.

COM 10

NC.

COM2

COM1

COM 10

JP17

JP2

2 1

9

10

2 1

9

10

2 1

9

10

2 1

9

10

See also other documents in the category DFI Motherboard: