ELECTRICAL CONNECTIONS
5
RX485+
TX485+
SGND RX485- TX485-
USER INTERFACE
SGND TX+
RX+
TX- RX-
SC4000
Figure 18 - RS485 Full-duplex Connections
NOTE
For applications that do not use RX485 signals, do not leave these lines
floating but connect them to SGND as shown below.
RX485+
SGND RX485-
USER INTERFACE
SGND TX+
TX-
SC4000
Figure 19 - RS485 Full-duplex Connections using Only TX Signals
RS485 Half-Duplex Interface
The RS485 half-duplex (3 wires + shield) interface is used for polled communication
protocols.
It can be used for Multidrop connections with a Datalogic MX4000 Multiplexer, exploiting a
proprietary protocol based on polled mode called MUX32 protocol, where a master device
polls slave devices to collect data.
Pinout
Function
RTX+
RS485 Receive/Transmit Data +
RTX-
RS485 Receive/Transmit Data -
SGND Signal
Ground
19
