Pepperl+Fuchs FUQ-B8, Руководство пользователя

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VB24
56
5.2.1 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:
25-pin Name Function
2 TX Transmit Data
3 RX Receive Data
4 RTS Request To Send
5 CTS Clear To Send
7 GND Ground
It is always advisable to use shielded cables. The overall maximum cable length must be less
than 15 m (49.2 ft).
VB24
7
4
5
3
GND
RTS
CTS
RX
TX
2
USER INTERFACE
GND
CTS
RTS
TXD
RXD
1
Chassis
Figure 45 – RS232 Main Interface Connections Using Hardware Handshaking
The RTS and CTS signals control data transmission and synchronize the connected devices.
START
OF
TRANSMISSION
END
OF
TRANSMISSION
+ V
RTS
- V
+ V
TX DATA
- V
+ V
CTS
- V
DATA
TRANSMISSION
DATA
TRANSMISSION
C1 C2 C4 C3 C5
TRANSMISSION
STOPPED
ENABLED
DISABLED
ENABLED
IDLE
IDLE
Figure 46 - RS232 Control Signals