Input Signals - Avery Dennison ALS 221 User Manual

Operators Manual
ALS 221

4.2 Input signals

This machine (dispenser) is provided with photo coupled inputs for:
the product sensor signal
an inhibit signal for inhibiting labelling
a signal from an OD control which shows the end of the material roll.
The inputs are galvanically separated through photo couplers to connect to PNP or NPN out-
puts. The wiring and the connection of the signal plug is shown otherwise. The input voltage
across the inputs must be in the range of 15 V to 30 V to switch active.
NPN
+24V DC
ln+
Opto-
isolator
2K2
ln-
Machine
Figure 6 Input connection and input circuit
Release 7/04
Bridge
Opto-
isolator
Signal
(alternative switch)
Page 21
PNP
+24V DC
Signal
ln+
2K2
ln-
Bridge
Machine
(alternative switch)
Connections