Barcode Scanner VB14
TYPICAL LAYOUTS
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
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12.3
RS232 Master/Slave
The RS232 master/slave connection is used to collect data from several scanners to
build either a multi-point or a multi-sided reading system; there can be one master and
up to 9 slaves connected together.
The Slave scanners use RS232 only on the main and auxiliary serial interfaces. Each
slave VB14 transmits the messages received by the auxiliary interface onto the main
interface. All messages will be passed through this chain to the Master.
The Master scanner is connected to the Host on the main serial interface. The
possible main interface types for the master scanner are RS232 or RS485.
There is a single reading phase and a single message from the master scanner to the
Host computer.
Either On-Line or Serial On-Line Operating modes can be used in this layout.
When On-Line Operating mode is used, the external trigger signal is unique to the
system, however it is not necessary to bring the external trigger signal to the Slave
scanners.
The main and auxiliary ports are connected as shown in the figure below.
Figure 12.3 RS232 Master/slave layout
1
1
1
3
2
VB14
VB14
VB14
2
Host
1
Main serial interface
2
Auxiliary serial interface
3
External Trigger (for On-Line mode)
VB14
SLAVE
VB14
SLAVE
VB14
MASTER
