Installation manual

INSTALLATION
3
3.6.2 Pass-Through
Pass-through mode allows two or more devices to be connected to a single external serial
interface.
Each DS2100N 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:
2
2
Device#2
3 3
1
Device#1
3
Device#n
1
 Main Serial Interface (RS232 only)
 Auxiliary Serial Interface (RS232)
 External Trigger (for On-Line Mode)
1
Host
Figure 39 – Pass-Through Layout
3.6.3 ID-NET™
The RS485 ID-NET™ connection is used to collect data from several scanners to build a
multi-point or a multi-sided reading system; there can be one master and up to 31 slaves
connected together.
The slave scanners are connected together using RS485 half-duplex on the ID-NET™
interface. Every slave scanner must have a multidrop address in the range 1-31.
The master scanner is also connected to the Host on the RS232/RS485 main serial
interface.
The External Trigger signal is unique to the system; there is a single reading phase and a
single message from the master scanner to the Host computer.
It is not necessary to bring the External Trigger signal to all the scanners.
45