Installation manual

INSTALLATION
3
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. 3.6.4 and 3.6.5) exploiting a proprietary protocol based on polled mode
called MUX32 protocol, where a master device polls slave devices to collect data.
The connector pinout follows:
Pin Name Function
2 RTX485+ RS485 Receive/Transmit Data +
4 RTX485- RS485 Receive/Transmit Data -
7 SGND Signal Ground
RTX485 +
2
RTX485 -
4
RTX485 +
RTX485 -
7
SGND
MULTIPLEXER
RS485REF
DS2100N
1
Chassis
Figure 22 - 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 Genius™ utility or by the Host Programming Mode.
Figure 23 shows a multidrop configuration with DS2100N scanners connected to a
Multiplexer.
CAUTION
This is an example of multidrop wiring. Consult the multiplexer manual for
complete wiring instructions.
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