I/O Box Pinouts

Standard RS-232 DTE - No DSR, No RI

Standard RS232 DCE

DB-25F Pin #

RS-232 Signal

2

RxD

3

TxD

4

DTR

5

DCD

7

GND

8

RTS

20

CTS

DB-25F Pin #

RS-232 Signal

Signal Direction

2

RxD

input

3

TxD

output

4

DCD

input

5

RTS

output

7

GND

signal ground

8

DTR

output

20

CTS

input

 

 

RJ modular connector

 

Wire #

8 wire

6 wire

4 wire

Signal Direction

1

DTR

 

 

output

2

RTS

RTS

 

output

3

SG

SG

SG

signal ground

4

TxD

TxD

TxD

output

5

SG

SG

SG

signal ground

6

RxD

RxD

RxD

input

7

CTS

CTS

 

input

8

DCD

 

 

input

DB-9 Male  Pin #

RS-232 Signal

1

DCD

2

RXD

3

TXD

4

DTR

5

Ground

6

Reserved

7

RTS

8

CTS

9

Reserved

Standard RS-232 DTE

1) The IOB08DB9V1/V5/V6 has the following pinouts when applied with Intellicon-Flex or Dflex products.

DB-9 Male

Pin #

RS-232

 

RS-485

 

RS-423

 

Current Loop

1

DCD

RxD+

RxD+

RxD-

2

RxD

TxD+

TxD Ref.

TxD-

3

TxD

TxD-

TxD-

TxD Source

4

DTR

RxD-

RxD-

TxD Return

5

Signal Ground

Signal Reference

Signal Reference

Signal Ground

6

Reserved

CTS-

CTS-

RxD Return

7

RTS

RTS-

RTS-

TxD-

8

CTS

RTS+

RTS Ref.

RxD+

9

Reserved

CTS+

CTS+

RxD Source

2)  The IOB08DB9V1/V5/V6 has the following pinouts when applied with the BlueHeat PCI/8 RS-232.

DB-9 Male

Pin #

RS-232

 

1

DCD

2

RXD

3

TXD

4

DTR

5

Signal Ground

6

DSR

7

RTS

8

CTS

9

RI

1) The IOB08DB9V2/V3/V4 has the following pinouts when applied with Intellicon-Flex or Dflex products.

DB-9 Pin #

RS-232

RS-485

RS-423

C-Loop

1

DCD

RxD+

RxD+

RxD-

2

RxD

TxD+

TxD Ref.

TxD-

3

TxD

TxD-

TxD-

TxD Source

4

DTR

RxD-

RxD-

TxD Return

5

Signal Ground

Signal Reference

Signal Reference

Signal Ground

6

Reserved

CTS-

CTS-

RxD Return

7

RTS

RTS-

RTS-

TxD-

8

CTS

RTS+

RTS Ref.

RxD+

9

Reserved

CTS+

CTS+

RxD Source

 2)  The IOB08DB9V2/V3/V4 has the following pinouts when applied with the BlueHeat PCI/8.

DB-9 Pin #

RS-232

RS-485

1

DCD

RxD+

2

RXD

TxD+

3

TXD

TxD-

4

DTR

RxD-

5

Signal Ground

Signal Reference

6

DSR

CTS-

7

RTS

RTS-

8

CTS

RTS+

9

RI

CTS+

See IOB08DB9V2

See IOB08DB9V2

See IOB08DB9V1

See IOB08DB9V1

1) The IOB08FT DB-25 female pinout corresponds to the CTI DTE pinout specification.

DB-25F Pin #

RS-232 Signal

RS-485 Signal

2

TxD

TXD-

3

RxD

TXD+

4

RTS

RTS-

5

CTS

RTS+

7

GND

SR

8

DCD

RXD+

20

DTR

RXD-

RJ-45 Pinouts

 

RJ modular connector

Wire #

8 wire

6 wire

4 wire

 

RS232

RS485

RS232

N/A

RS232

N/A

1

DCD

RXD+

 

 

 

 

2

CTS

RTS+

CTS

 

 

 

3

GND

SR

GND

 

GND

 

4

RxD

TXD+

RxD

 

RxD

 

5

GND

SR

GND

 

GND

 

6

TxD

TXD-

TxD

 

TxD

 

7

DTR

RXD-

DTR

 

 

 

8

RTS

RTS-

 

 

 

 

1) The IOB08FTV2/V3/V4 DB-25 female pinout corresponds to the CTI DTE pinout specification.

DB-25F Pin #

RS-232 Signal

Signal Direction

2

TxD

Output

3

RxD

Input

4

RTS

Output

5

CTS

Input

7

GND

GND

8

DCD

Input

20

DTR

Output

1.1.         RJ-45 Pinouts

1) The IOB08FTV2/V3/V4 RJ-45 pinout corresponds to the CTI DTE pinout specification

 

RJ modular connector

 

Wire #

8 wire

6 wire

4 wire

Signal Direction

1

DCD

 

 

Input

2

CTS

CTS

 

Input

3

GND

GND

GND

GND

4

RxD

RxD

RxD

Input

5

GND

GND

GND

GND

6

TxD

TxD

TxD

Output

7

DTR

DTR

 

Output

8

RTS

 

 

Output

 

See IOB08FTV1

See IOB08FTV1

See IOB08FTV1

Standard RS232 DB9M