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Null modem cables – Rockwell Automation 5000,D50006.2.10 PI INSTALLATION MANUAL User Manual

Page 191

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Cable Connections for the RM and KA Module

Appendix C

C-11

Null Modem Cables

Figure C.9, Figure C.10, and Figure C.11 show null-modem cable pinouts
for port 1.

Figure C.9

NullĆModem Cables for FullĆDuplex Modem Option

GND

SHIELD

TxD

1

2

3

4

5

6

7

RxD

RTS

CTS

DSR

SIGNAL

DCD

SIGNAL

RTS

GND
DCD

DTR

SHIELD

RxD

TxD

CTS

DSR

8

20

DTR

SHIELD

TxD

1

2

3

4

5

6

8

RxD

RTS

CTS

DSR

DCD

RTS

DCD

DTR
SIGNAL

SHIELD

RxD

TxD

SIGNAL

20

7

DSR
DTR

GND

GND

CTS

RM or KA module

RM or KA module

Option 1

Option 2

Ċ uses DSR/DTR

Ċ bypasses DSR/DTR

Figure C.10

NullĆModem Cables for HalfĆDuplex Modem Option

GND

SHIELD

TxD

1

2

3

4

5

6

7

RxD

RTS

CTS

DSR

SIGNAL

DCD

SIGNAL

RTS

GND
DCD

DTR

SHIELD

RXD

TXD

CTS

DSR

8

20

DTR

SHIELD

TxD

1

2

3

4

5

7

8

RxD

RTS

CTS

SIGNAL

DCD

DCD

RTS

DSR

DTR

SHIELD

RxD

TxD

CTS

DSR

6

20

SIGNAL

GND

GND

DTR

Option 1

Option 2

RM or KA module

RM or KA module

Ċ uses DSR/DTR

Ċ bypasses DSR/DTR

Figure C.11

NullĆModem Cables for No Handshaking

GND

SHIELD

TxD

1

2

3

7

RxD

SIGNAL

SIGNAL

GND

SHIELD

RxD

TxD

RM or KA module