Datalogic DP1200, Installation Manual

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DP1200
26
2
2.5.2 Pass Through
Pass through mode allows two or more devices to be connected to a single external
serial interface to build multi-point reading systems.
Each DP1200 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 system 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
3
3
1
2
DP1200 DP1200
1
LSXXXX
reader
LSXXXX
reader
Main serial interface
Auxiliary serial interface
External Trigger (for On-Line mode)
1
2
3
Figure 25 - Pass through layout