Opticon XPT 3125 Universal menubook - Manual (Page 15)

OPTICON Universal menu book
U8
2.1. RS232 options
This paragraph describes the specific options
for a reader with an RS232 interface.
Bar code readers with an RS232 interface are
normally supplied with either a DB25 or DB9
female connector. Both connectors are fitted
with an external power connector. See figure
2.01 or 2.02.
Other connectors and/or connections are
available by special order.
Pin functions as seen from the bar code reader.
FG:
Frame Ground: This is normally connected to
the "chassis ground" at the host computer. In
the RS232 specification the use of FG is
optional.
TxD:
Transmitted Data: Transmits data from the
reader to the host. This connection is
mandatory.
RxD:
Received Data: Receives data from the host to
the reader. This connection is required if you
want to send commands to the bar code reader
or if software handshaking or
acknowledgement control is used.
RTS:
Request To Send: A general purpose output to
the host, used for hardware flow control. This
connection is optional.
CTS:
Clear To Send: A general purpose input to the
bar code reader, used for hardware flow
control. This connection is optional.
SG:
Signal Ground: Reference point for power
supply and interface signals. This connection is
mandatory.
FG
TxD
RxD
RTS
CTS
SG
FG
TxD
RxD
RTS
CTS
SG
1
2
3
4
5
7
SCANNER
HOST
DB25S
1
2
3
4
5
7
DB25P
Fig. 2.01. RS232 options DB25
TxD
RxD
SG
TxD
RxD
SG
3
2
5
7
8
SCANNER
HOST
DB9S
RTS
CTS RTS
CTS
3
2
5
7
8
DB9P
Fig. 2.02. RS232 options DB9