DS2100
10
2
RS232 Interface
The serial interface is used in this case for point-to-point connections; it handles
communication with the host computer and allows both transmission of code data
and the programming of the scanner. This is the default setting.
The following pins are used for RS232 interface connection:
Connector Name Function
9-Pin 25-Pin
2 2 TX232 transmitted data
3 3 RX232 received data
6 4 RTS232 request to send
4 5 CTS232 clear to send
5 7 GND/SGND signal ground
It is always advisable to use shielded cables. The overall maximum cable length
must be less than 15 m (49.2 ft).
DS2100 25-pin
7
4
5
3
SGND
RTS232
CTS232
RX232
TX232
2
USER INTERFACE
SGND
DCD
DTR
TXD
RXD
DS2100 9-pin
5
4
3
SGND
or
CTS232
RTS232
RX232
TX232
2
6
Earth
Ground
Figure 7 – RS232 main interface connections using hardware handshaking
The RTS232 and CTS232 signals control data transmission and synchronize the
connected devices.
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