Rs232 Interface - Datalogic DS8100A 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 scanner. 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:
+ 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 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.
32
Pin Name
2 TX
3 RX
4 RTS
5 CTS
7 GND_ISO
DS8100A
2
3
4
5
7
1
Figure 42 - RS232 Connections
START
OF
TRANSMISSION
DATA
TRANSMISSION
C1 C2
ENABLED
IDLE
Figure 43 - 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
C4 C5
C3
TRANSMISSION
STOPPED
ENABLED
DISABLED
DS8100A REFERENCE MANUAL
END
OF
TRANSMISSION
IDLE