Datalogic QLM500 Instruction Manual download pdf (Page 68)

MATRIX 410™ REFERENCE MANUAL

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 proprietary 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-

READER

Figure 52 - 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.

Figure 53 shows a multidrop configuration with Matrix 410™ readers connected to a

Multiplexer.

CAUTION

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

complete wiring instructions.

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 160 161

No comments

Datalogic QLM500 Instruction Manual Page 68