Rs232 Interface - Pepperl+Fuchs FUQ-B8 Manual

VB24

4.2.1 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:
CBX100/500
TX
RX
RTS
CTS
SGND
It is always advisable to use shielded cables. The overall maximum cable length must be less
than 15 m (49.2 ft).
Figure 21 – RS232 Main Interface Connections Using Hardware Handshaking
The RTS and CTS signals control data transmission and synchronize the connected devices.
+ V
RTS
- V
+ V
TX DATA
- V
+ V
CTS
- V
If the RTS/CTS handshaking protocol is enabled, the VB24 activates the RTS output to
indicate a message is to be transmitted. The receiving unit activates the CTS input to enable
the transmission.
38
Function
Transmit Data
Receive Data
Request To Send
Clear To Send
Signal Ground
SCANNER
START
OF
TRANSMISSION
DATA
TRANSMISSION
C1 C2
TRANSMISSION
STOPPED
ENABLED
DISABLED
IDLE
Figure 22 - RS232 Control Signals
USER INTERFACE
SGND RXD TXD
CTS RTS
SGND TX RX
RTS CTS
END
OF
TRANSMISSION
DATA
TRANSMISSION
C5
C3 C4
ENABLED
IDLE