DS8100
24
2
PS1 is the main presence sensor (external trigger). When active, this input tells the
scanner to scan for a code and that decoding can take place. The yellow LED (Figure
A, 4) indicates that PS1 is active.
PS2 can be used as the stop signal for the reading phase.
All inputs are optocoupled and driven by a constant current generator; the command
signal is filtered through an anti-disturbance circuit which generates a delay of about
5 ms for PS1 and PS2 and 500
µ
s for ENC/PS3.
+
10/12/14
11/13/15
A2
A1
DS8100
INPUT DEVICE
+
VS
GND
-
Figure 23 - PNP input command
INPUT DEVICE
Signal
DS8100
+
-
10/12/14
11/13/15
+
V
Vext
Figure 24 - PNP input command using external power
Signal
+
10/12/14
11/13/15
A2
A1
+
-
VS
GND
Ground
INPUT DEVICE
DS8100
V
Figure 25 - NPN input command
