Barcode Scanner VB12
Installation
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
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The following pins of the 25-pin connector are used to connect the RS 232 auxiliary
interface:
Figure 5.11
RS 232 auxiliary interface connections
5.4.4
Inputs
The inputs available on the connector supplied with the scanner are indicated below:
The yellow LED (see section 4.2, figure 4.1, pos. 5) is on when external trigger forces
a current flow through the EXT TRIG+ and EXT TRIG- pins. This input is optocoupled
and can be driven by both an NPN or PNP type command. The connections are
indicated in the following diagrams (figure 5.12 to figure 5.15):
Figure 5.12
Input NPN command using external power
Pin
Name
Function
3, 20
RX232
Received data
2, 21
TX232
Transmitted data
7
SGND (GND)
Signal ground
Pin
Name
Function
18
EXT. TRIG.+
External T
19
EXT. TRIG.-
External Trigger -
22
GND
I/O reference
The EXT TRIG input is used to connect the external trigger which tells
the scanner to scan for a code. The active state of this input is selected
in software. Refer to the VisoSetup Help On Line.
3/20
2/21
7
USER INTERFACE
VB12
RXD
SGND
RXAUX
TXAUX
TXD
SGND
EXT TRIG+
18
19
+ 5V
VB12
EXTERNAL TRIGGER
Signal
V
30 V DC max.
Vext
EXT TRIG-