Operators Manual
ALS 330/430
8.3 Input signals
This machine (dispenser) is provided with photo coupled inputs for:
ythe product sensor signal
yan inhibit signal for inhibiting labelling
ya signal from an OD control which shows the end of the material roll.
ya signal from an automatic product speed follower
ythe EP applicator signals from the HOME and END switches
yan unused input for future extensions or customer specific software (used for loop control in the 720)
The inputs are galvanically separated through photo couplers to connect to PNP or NPN outputs. 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 | PNP |
Opto- isolator
2K2
+24V DC | +24V DC |
| Signal |
ln+ | ln+ |
(alternative switch)
Opto- isolator
2K2
ln- | ln- |
Signal
(alternative switch)
Machine | Machine |
Figure 21: Connecting NPN (left) or PNP (right) inputs.
Release 4/06 | Page 60 | Connections and signals |