Datalogic Scanning DS1500 - Manual (Page 37)

INSTALLATION
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2.6.2 Pass-Through
Pass-through mode allows two or more devices to be connected to a single external
serial interface.
Each DS1500 transmits the messages received by the Auxiliary interface onto the
Main interface. All messages will be passed through this chain to the host.
When On-Line Operating mode is used, the scanner is activated by an External
Trigger (photoelectric sensor) when the object enters its reading zone.
The Main and Auxiliary ports are connected as shown in the figure below:
Host
1
DS1500
2
3 3
1
DS1500
Main serial interface
Auxiliary serial interface
External Trigger (for On-Line mode)
1
2
3
Figure 20 – Pass-Through Layout
NOTE
The Auxiliary RS232 interface is only available when the main
interface is RS232.
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