DS8100A
2
Main Interface The main serial interface is compatible with the following electrical standards:
RS232
RS485 full-duplex
RS485 half-duplex
(20 mA current loop)
The 20 mA Current Loop interface is available by using the C-BOX 100 with the optional
INT-30 accessory installed in it. The scanner communicates to the C-BOX 100 through the
RS232 interface and the INT-30 converts the signals.
The main serial interface type and its relative parameters (baud rate, data bits, etc.) are
selected via software using the Genius™ utility program. For more details refer to the
section "Main Serial Port" in the Genius™ Help On Line.
Details regarding the connections and use of the main interface selection are given in the
next paragraphs.
RS232 Interface
The main serial interface is used for communication with the Host computer and allows both
transmission of code data and configuring the reader. The overall maximum cable length
should not exceed 15 m (50 ft).
The following pins of the 26-pin connector are used for RS232 interface connection:
Pin Name Function
2 TX Transmit
3 RX Receive
4 RTS Request to send
5 CTS Clear to send
7 GND-ISO Main signal ground
The RTS and CTS signals control data transmission and synchronize the connected devices.
If the RTS/CTS hardware protocol is enabled, the DS8100A activates the RTS output to
indicate a message can be transmitted. The receiving unit must activate the CTS input to
enable the transmission.
DS8100A
7GND-ISO SGND Main Isolated
USER INTERFACE
RTS
4
CTS
5
RX
3
RXD
TX
2
TXD
1Earth
Ground
CHASSIS
Figure 10 - RS232 Connections
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