INSTALLATION – DS8100 SERIAL INTERFACE
29
2
2.6.2 Pass Through
Pass Through Mode allows two or more devices to be connected to a single external
serial interface. The DS8100 transmits the messages received by its auxiliary
interface (RS232 only) onto its main interface.
In this configuration a series of scanners can be connected together using RS232 on
the main interface and all messages will be passed through this chain to the host.
The reading phase of each scanner is independent from the others in a Pass
Through chain. When On-Line Operating mode is used, the scanner is activated by
an External Trigger (presence sensor) when the object enters its reading zone.
Applications can be implemented to connect a device such as a hand-held reader to
the Auxiliary port for manual code reading capability.
3 3
1
Main serial interface
2
Auxiliary serial interface
3
Presence sensor (for On-Line mode)
Host
DS8100 DS8100
Hand-Held reader
1
2
1
Figure 32 - Pass through layout
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