Installation manual

CBX ELECTRICAL CONNECTIONS

4.2.3 RS485 Half-Duplex Interface

NOTE

This interface is provided for backward compatibility. We recommend using

the more efficient ID-NET™ network for Master/Slave or Multiplexer layouts.

The RS485 half-duplex (3 wires + shield) interface is used for polled communication

protocols.

It can be used for Multidrop connections with a Datalogic Multiplexer, (see par. 6.5) exploiting

a proprietar

y protocol based on polled mode called MUX32 protocol, where a master device

polls slave devices to collect data.

CBX100/500

Function

RTX+ RS485 Receive/Transmit Data +

RTX- RS485 Receive/Transmit Data -

SGND Signal Ground

RTX485+

SGND RTX485-

USER INTERFACE

SGND RTX+

RTX-

SCANNER

Figure 41 - RS485 Half-duplex Connections

This interface is forced by software when the protocol selected is MUX32 protocol.

In a Multiplexer layout, the Multidrop address must also be set via serial channel by the

Genius™ utility or by the Host Programming Mode.

Figure 42 shows a multidrop configuration with DS2400N scanners connected to a

Multiplexer.

CAUTION

This is an example of multidrop wiring. Consult the multiplexer manual for

complete wiring instructions.