Datalogic Compact 2D Reader Matrix-2000 Manual de instrucciones descargar pdf (Pagina 58)

MATRIX-2000™ REFERENCE MANUAL

5.5.3 RS485 Half-Duplex Interface

The opto-isolated RS485 half-duplex (3 wires + shield) interface is available for polled

communication protocols.

It can be used for multidrop connections with a Datalogic Multiplexer, (see Figure 70 and par.

6.4) exploiting a proprietary protocol based on polled mode called MUX32 protocol, where a

master device polls slave devices to collect data.

The following pins of the 25-pin connector are used for RS485 half-duplex communication:

Pin Name Function

2 RTX+ RS485 Receive/Transmit Data (+)

4 RTX- RS485 Receive/Transmit Data (-)

7 GND_ISO Main opto-isolated reference ground

MATRI

RTX-

RTX+

MULITPLEXER

RTX485-

RTX485+

GND_ISO

RS485REF

SHIELD

Earth Ground Earth Ground

Chassis

Figure 69 - 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

VisiSet™ utility or by the Host Programming Mode.

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Datalogic Compact 2D Reader Matrix-2000 Manual de instrucciones Pagina 58