CHAPTER 6
RS232 & RS422 CABLING INFORMATION


 
6.1 RJ11 Connector

The communication interface follows the EIA RS232C standard. Each RS232 port has one RJ-11 female connector for connection to a peripheral device. The board-mounted female RJ-11 pin identification is shown in the following:

The RJ-11 to DB25 expansion cable assignment is shown in the following:

To connect PCCOM 8 port adapter to other DATA TERMINAL EQUIPMENT (DTE) devices, the developers recommend the following connection method.

6.2  DB25 Connector

The communication interface follows the EIA RS232C standard. The signal assignments for a standard DB25 connector are shown below:

To connect the PCCOM 8 port adapter to other DATA TERMINAL EQUIPMENT (DTE) devices, we recommend using a DTE to DTE connection as shown below :

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6.3 Null Modem Connections: RS232

If the software supplier or operating system does not specify a particular cable configuration, we recommend you use the following ˇ§null modemˇ¨ cable when XON/XOFF is utilized.

If hardware handshaking is necessary, use the following cable:

Some serial devices have the buffer control signal on pin 19, in which case pin 6 on the host is connected to pin 19 on the remote device.


6.4 Modem Connections

A straight through cable is required, e.g. pin 2 to pin 2, pin 3 to pin 3, etc.

6.5 DB9 Connector

The signal assignments for a standard DB9 connector are shown below:


6.6 RS422 Connector

The signal assignments for a standard DB25 connector are shown in the following.

To connect the RS422 to other DATA TERMINAL EQUIPMENT (DTE) devices, the developers recommend using a DTE to DTE connection as shown below.