Appendix B

RS232 Connector and Cable

Table C-43. Serial Connector Pinouts (SPA and SPB)

 

 

 

 

 

 

 

PIN

MNEMONIC

TYPE

DESCRIPTION

 

 

 

 

 

 

 

 

1

-

-

Unconnected (DCD)

 

 

2

DSR

I

Data Set Ready

 

 

3

RXD

I

Receiver Data Input

 

 

4

RCTS

I/O

RTS/CTS, (shorted to pin 6)

 

 

5

TXD

O

Transmitter Data Output

 

 

6

RCTS

I/O

RTS/CTS, (shorted to pin 4)

 

 

7

DTR

O

Data Terminal Ready

 

 

 

 

 

 

 

 

8

-

-

Unconnected (RI)

 

 

 

 

 

 

 

 

9

GND

-

Signal Ground

 

 

 

 

 

 

 

 

10

-

-

Unconnected

 

 

 

 

 

 

 

NOTE: The same cable for the second Serial Port for PC compatible systems can be used for the 4221 Condor. This cable can be built or bought off-the-shelf from many computer stores. The cable pinout is shown in the following table:

Table C-44. Suggested RS232 Cable Pinout

 

 

 

 

 

 

 

10-PIN

DB-25 PIN

MNEMONIC

DESCRIPTION

 

 

 

 

 

 

 

 

1

8

DCD

Data Carrier Detect

 

 

2

6

DSR

Data Set Ready

 

 

 

 

 

 

 

 

3

3

RXD

Receiver Data Input

 

 

 

 

 

 

 

 

4

4

RTS

Request to Send

 

 

 

 

 

 

 

 

5

2

TXD

Transmitter Data

 

 

 

 

 

 

 

 

6

5

CTS

Clear To Send

 

 

 

 

 

 

 

 

7

20

DTR

Data Terminal Ready

 

 

8

22

RI

Ring Indicator

 

 

9

7

GND

Signal Ground

 

 

10

-

-

Unconnected

 

 

 

 

 

 

 

NOTE: Both RS232 ports on the Condor are configured as Data Terminal Equipment (DTE). With this connector and cable configuration, a NULL modem cable may be required to connect a terminal to the board.

106