DS2400
16
2
DS2400
TX485+
2
TX485-
4
RX485+
3
RX485
RX485-
5
TX485
7
SGND
SGND
USER INTERFACE
+
-
+
-
+
Figure 15 - RS485 full-duplex connections
RS485 Half-Duplex Interface
The RS485 half-duplex (3 wires + shield) interface is used for polled communication
protocols.
It can be used in a master/slave layout or for Multidrop connections with a Datalogic
Multiplexer, (see par. 2.6.4 and 2.6.5).
The connector pinout follows:
Pin Name Function
2 RTX485+ RS485 transmit/receive data +
4 RTX485- RS485 transmit/receive data -
7 SGND signal ground
RTX485 +
2
RTX485 -
4
RTX485 +
RTX485 -
7
SGND
MULTIPLEXER
RS485REF
DS2400
Figure 16 - RS485 half-duplex connections
This interface is forced by software when the protocol selected is MUX32 protocol.
In a Multiplexer layout or for slaves, the Multidrop address must also be set via serial
channel by the WinHost utility or by ESC sequences.
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