Collamat Etiprint Inline, Руководство по эксплуатации

Страница: 158 / 188

7 Signals and connector pin assignments
This chapter describes the signals of the Collamat 8600. All in- and outputs are described func-
tionally and electrically. Also the pin assignments are described.
All in- and outputs are equipped with filterelements to prevent electromagnetic interference.
These components also prevent interference caused by electrostatic discharge. The interference
can lead to malfunction of the Collamat 8600. Anyway, installing the Collamat 8600 you have to
consider the rules concerning RMI and ESD to prevent these interferences.
7.1 Inputs
There are two different kind of inputs:
Photocoupler inputs : isolated by photocouplers
Comparator inputs : with ground referenced comparator
7.1.1 Photocoupler inputs
The photocoupler inputs are used to connect different equipment which may have a different
grounding or another ground reference. So circulating ground current through the inputs is not
possible and interference due to this can not take place. All photocoupler inputs are protected
against wrong polarity and overvoltage. Figure 21 shows the schematics of the photocoupler
inputs:
On : 5mA (@ 12V)
Off: 0mA
Vmax: 24V
Figure 21: Photocoupler input diagram
The input is active when a current higher than 5mA (at 12V) runs through the photocoupler LED.
The maximum input voltage is 24V.
The following input signals are equipped with photocouplers:
GSC3 Goods scanner for nonstop labelling or external counter
NSTPI Control signal for the nonstop labelling
STOP Control input for an external controller
10nF
10k
1k8
+5V
SFH6156-3
1N4148
74AC14
2k2
1n
1n
Anode
Cathode
5999.545-01G 28.02.2006 WM
Page 28 / 65