Datalogic QLM500 Instruction Manual download pdf (Page 106)

MATRIX 410™ REFERENCE MANUAL

6.2 PASS-THROUGH

6.2.1 Pass-Through on RS232

Pass-through mode allows two or more devices to be connected to a single external serial

interface.

Each reader transmits the messages received by the Auxiliary interface onto the Main

interface. All messages will be passed through this chain to the host.

When One Shot or Phase Mode operating mode is used, the reader can be activated by an

External Trigger (for example a pulse from a photoelectric 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 of the last reader in the chain for manual code reading capability.

The Main and Auxiliary ports are connected as shown in the figure below:

Figure 103 – Pass-Through Layout

NOTE

The reading device connected to the Host can be connected to a Fieldbus

network using a Host Interface module through a CBX500 connection box.

Host

Device#1

 Main Serial Interface (RS232 only)

 Auxiliary Serial Interface (RS232)

 External Trigger (for One Shot or Phase Mode)

Device#2

Device#n

Power

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 160 161

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Datalogic QLM500 Instruction Manual Page 106