DS6500
20
2
Inputs
The inputs of the reader are on the 25-pin and 26-pin connector (Figure 4, 1 and Figure 5, 1)
of the DS6500.
These inputs are called EXT_TRIG, IN2, IN3 and IN4.
Pin Name
Function
18
EXT_TRIG A External trigger (polarity insensitive)
19
EXT_TRIG B External trigger (polarity insensitive)
6
IN2A
Input signal 2 (polarity insensitive)
10
IN2B
Input signal 2 (polarity insensitive)
14
IN3A
Input signal 3 (polarity insensitive)
15
IN4A
Input signal 4 (polarity insensitive)
24
IN_REF
Common reference of IN3 and IN4 (polarity insensitive)
IN2 is normally used for the Encoder input. In PackTrack™ mode, it detects the conveyor
speed.
EXT_TRIG is the main presence sensor. When active, this input tells the scanner to scan for
a code and that decoding can take place. The yellow LED (Figure 3,3) indicates the
EXT_TRIG is active.
IN3 and IN4 can be used as the stop signal for the reading phase.
All inputs are optocoupled, polarity insensitive, and driven by a constant current generator;
the command signal is filtered through an anti-disturbance circuit which generates a delay
which can be set to 5 ms or 500
µ
s. In particular, EXT_TRIG, IN3 and IN4 share the same
value which usually corresponds to 5 ms when using a photoelectric sensor, while IN2 has a
different value which is set to 500
µ
s when this input is used for the Encoder.
EXTERNAL TRIGGER/ENCODER
DS6500
PSIN
+ 5V
A
Vext
B
GND
V
~
~
+
-
Figure 31 – PNP Command Input Connection
EXTERNAL TRIGGER/ENCODER
DS6500
PSIN
+ 5V
B
Vext
A
GND
V
~
~
+
-
Figure 32 - PNP Command Input Connection
