Barcode reader VB34
Installation
Da
te
of
issue
06/
1
3
/2005
32
Subject to reasonable modifications due to technical advances.
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as well as for 1 ms for OUT3+.
If the load is powered by an external voltage supply, the voltage must be less than
30 V.
6.3.2
Lonworks connector
The network used by VB34 is based upon a Lonworks communication system, for
which only two leads (with exchangeable polarity) are required for a connection.
Furthermore, the supply voltage is lead through to the connectors. In this way, all the
slave readers can be supplied via the VISOLUX standard cable by the master.
For applications, in which an increased range of functions is required for
synchronization, the VB34 master issues two system signals with the descriptions
Sys_I/O and Sys_Enc_I/O to the slave devices. If, for example, an application works
with an encoder, the signal is received by the master and transmitted via the cable
directly to all slave devices.
The internal circuits, which generate the system signals, are powered externally via
the pins VS_I/O and REF_I/O and are galvanically isolated from the voltage supply of
the reader.
These system circuits do not have to be used in all operating modes (see section 1.7
for additional information). To ensure that the system works without errors, only
original cables and accessories should be used. The wiring must be in accordance
with the example configurations (see section 1.7 for details).
Figure 6.26
9-pin local Lonworks connectors
VB34 electrical connections of the 9-pin Lonworks connectors
Pin
Description
Function
1
Shield
Shielding of the cable
9
VS
Supply voltage - plus
2
GND
Supply voltage - minus (ground)
6
VS_I/O
Supply voltage of the I/O circuit
3
Ref_I/O
Reference voltage of the I/O circuit
4
SYS_ENC_I/O System signal
5
SYS_I/O
System signal
7
LON A
Lonworks lead (polarity exchangeable)
8
LON B
Lonworks lead (polarity exchangeable)