Datalogic Scanning LASER SCANNER DS4300 - Manual (Page 37)

DS4300 DATALOGIC
2.22 - Installation
2.6.2 Pass Through
Pass through mode allows two or more devices to be connected to a single
external serial interface.
Each DS4300 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:
1 Main serial interface
2 Auxiliary serial interface
3 External Trigger (for On-Line mode)
2 1
Host
1
DS4300 DS4300
3 3
Figure 2.29 - Pass through layout