Rs485 Full-Duplex Interface - Datalogic DS4800 Reference Manual

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4.2.2 RS485 Full-Duplex Interface

The RS485 full-duplex (5 wires +
protocols in p oint-to-point connections over longer distances (max 1200 m / 3940 ft) than
those accepta ble for RS232 communications or in electrically noisy environments.
The CBX pinout follows:
CB X100/500
TX+
RX+
TX-
RX-
SGND
For applications that do not use RX485 signals, do not leave these
floating but connect them to SGND as shown below.
NOTE
Figure 25 - RS485 Full-duplex Connections using Only TX Signals
40
shield) interface is used for non-polled communication
Function
RS485 Transmit Data +
RS485 Receive Data +
RS485 Transmit Data -
RS485 Receive Data -
Signal Ground
SCANNER SGND TX+
Figure 24 - RS485 Full-duplex Connections
SCANNER SGND TX+
DS4800 REFERENCE MANUAL
USER INTERFACE
RX485+ TX485+
SGND RX485- TX485-
RX+
TX- RX-
USE R INTERFACE
RX485+
SGND RX485-
TX-
lines