Omnitron Systems Technology RS-232 - Manual (Page 8)

2
Section 2
INSTALLATION
Host Connections
The Omni reader is connected to the host’s RS-232 communications port. The
cable has a DB-9 connector at one end, and is connected to the reader at the
other end. (An adapter can be used to connect to a DB-25 RS-232 port.)
The USB/RS-232 version of the Omni is connected to one of the host’s USB
ports. It is necessary to configure the unit as an RS-232 device by installing
the ID TECH USB/RS-232 drivers. Please see Appendix F for details.
Data is transmitted to the host in an ASCII data format. The reader’s output
can be formatted with terminating characters and special preamble and/or
postamble character strings to match the data format expected by the terminal.
The terminal must be configured to accept the data and to perform the
appropriate processing. Care must be taken to ensure that the RS-232
parameters (baud rate, data bits, Start/Stop characters, parity, and handshaking
method) match those expected by the terminal. Just transmitting the data to
the serial port does not necessarily mean it will appear on the screen as if it
were entered manually.
If the host is programmable (such as a PC running in terminal mode), a
communication program, such as Procomm or Hyper Terminal, can be used to
display the data.
There is insufficient power available on a standard RS-232 serial port to
power the Omni, so an external wall-mounted power module must be used.
Connect the power cable from this unit to the power receptacle located on
the DB-9 connector. Care must be taken to ensure the power module operates
within +5VDC +10%.
When operating the USB/RS-232 version of the Omni, power is obtained
from the USB port. No external power module is necessary.