Datalogic DS8100A-3115 Manual de Instalação descarregar pdf (Página 37)

CBX ELECTRICAL CONNECTIONS

3.2.2 RS485 Full-Duplex Interface

The RS485 full-duplex (5 wires + shield) interface is used for non-polled communication

protocols in point-to-point connections over longer distances (max 1200 m / 3940 ft) than

those acceptable for RS232 communications or in electrically noisy environments.

If the shield is tied to ground at the Host, then leave it floating at the CBX. If it is floating at

the Host then tie it to Shield at the CBX.

The CBX pinout follows:

CBX100/500

Function

TX+ RS485 Transmit Data +

RX+ RS485 Receive Data +

TX- RS485 Transmit Data -

RX- RS485 Receive Data -

SGND Signal Ground

RX485+ TX485+

SGND RX485- TX485-

USER INTERFACE

SGND TX+ RX+

TX- RX-

SCANNER

Figure 18 - RS485 Full-duplex Connections

NOTE

For applications that do not use RX485 signals, do not leave these lines

floating but connect them to SGND as shown below.

RX485+

SGND RX485-

USER INTERFACE

SGND TX+

TX-

SCANNER

Figure 19 - RS485 Full-duplex Connections using Only TX Signals

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Datalogic DS8100A-3115 Manual de Instalação Página 37