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RITY122

12 RITY122 Quick Reference Guide

2.1.2 External Serial Port 2 connector (COM2)

In RS-232 Mode

Signal

PIN

PIN

Signal

DCDB#

1

6

DSRB#

RXDB

2

7

RTSB#

TXDB

3

8

CTSB#

DTRB#

4

9

RIB#

GND

5

In RS-422 Mode

Signal

PIN

PIN

Signal

TxD1-

1

6

NC

TxD1+

2

7

NC

RxD1+

3

8

NC

RxD1-

4

9

NC

GND

5

In RS-485 Mode

Signal

PIN

PIN

Signal

DATA1-

1

6

NC

DATA1+

2

7

NC

NC

3

8

NC

NC

4

9

NC

GND

5

1 2 ... 7 8 9 10 11 12 13 14 15

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