3–4
Installing the KFC15/KFCD15 Module
Publication 17706.5.20 - June 1997
Connecting to a Host through the Parallel Port
The parallel port interface is compatible with the parallel ports of
IBM PCs, and also with bidirectional parallel ports of PS/2
computers. Two data transfer modes are available to provide
compatibility. Both types of parallel ports can send data from the
computer in bytes and receive information in nibbles. You can
configure the KFC15/KFCD15 module to send data back in bytes,
instead of nibbles, for computers with bidirectional parallel ports.
Specify the mode of parallel port operation using the push buttons on
the configuration panel. Configuration is discussed in Chapter 5,
Communicating with the KFC15/KFCD15 Module. In either case,
the appropriate software driver is required on the host computer.
Cables
The maximum cable length recommended is 3 m (10 ft). The cable
should be shielded.
Connector
The parallel port interface connector is a DB-25 female connector
with a standard Centronics pinout. See Appendix B, Cabling and
Pinouts for cabling and pinout details.
Parallel Port Activity Indicator
The HOST LED will flicker when the KFC15/KFCD15 module is
receiving or transmitting data over the parallel interface. The LED
will be off when no data activity is occurring over either the
RS-232C or the parallel port interface.