Rs232 Interface - Datalogic DS6400 Reference Manual

4
4.2.1

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 25/26-pin connector are used for RS232 interface connection:
+ V
RTS
- V
+ V
TX DATA
- V
+ V
CTS
- V
The RTS and CTS signals control data transmission and synchronize the connected devices.
If the RTS/CTS handshaking protocol is enabled, the DS6400 activates the RTS output to
indicate a message is to be transmitted. The receiving unit activates the CTS input to enable
the transmission.
44
Pin Name
2 TX
3 RX
4 RTS
5 CTS
7 GND_ISO
DS6400
2
3
4
5
7
1
Figure 55 - RS232 Connections
START
OF
TRANSMISSION
DATA
TRANSMISSION
C1 C2
ENABLED
IDLE
Figure 56 - RS232 Control Signals
Function
Transmit
Receive
Request to send
Clear to send
Main signal ground
USER INTERFACE
TX
RXD
RX
TXD
RTS
CTS
GND_ISO
SGND Main Isolated
CHASSIS
Earth
Ground
DATA
TRANSMISSION
C5
C3 C4
TRANSMISSION
STOPPED
ENABLED
DISABLED
DS6400 REFERENCE MANUAL
END
OF
TRANSMISSION
IDLE