Rs485 Full-Duplex Interface - Pepperl+Fuchs VB14N Manual

VB14N

4.2.2 RS485 Full-Duplex Interface

The RS485 full-duplex (5 wires + shield) interface is used for non-polled communication protocols in
point-to-point connections over longer distances (max 1200 m / 3940 ft) than those acceptable for
RS232 communications or in electrically noisy environments.
The CBX pinout follows:
CBX100/500
TX+
RX+
TX-
RX-
SGND
For applications that do not use RX485 signals, do not leave these lines floating but
connect them to SGND as shown below.
NOTE
Figure 22 - RS485 Full-duplex Connections using Only TX Signals
30
Function
RS485 Transmit Data +
RS485 Receive Data +
RS485 Transmit Data -
RS485 Receive Data -
Signal Ground
USER INTERFACE
SGND
SCANNER SGND TX+
Figure 21 - RS485 Full-duplex Connections
USER INTERFACE
SGND
SCANNER SGND TX+
RX485+ TX485+
RX485- TX485-
RX+
TX- RX-
RX485+
RX485-
TX-