Specifications

16 PCI Comm Card Series User's Manual

RS-422/485 selection (for PCI-1601/1602/

1612)

You can set each port individually for either RS-422 (the default) or

RS-485 operation. The figure below shows the jumper settings. See

the "Jumper and Switch Locations" figure from page 7 to 11 for help

to locate the jumpers.

Enable mode selection

You set the Enable mode using two- or four- position DIP switches,

one for each port. If the switches are set to "AUTO", the driver auto-

matically senses the direction of the data flow and switches the

direction of transmission. No handshaking is necessary.

If DIP switches are set to "On," the driver is always enabled, and

always in high or low status. The user must select a mode before

beginning RS-422 applications.

Terminator resistor setup (for PCI-1601/

1602/1612)

You can install terminator resistors if necessary to match impedance.

Each signal line (RTS, CTS) has a separate resistor.

485485

485

RS-485

RS-422 (default)

422422

422

485485

485

422422

422

120

300