Moeller EC4-200 - Connecting Digital Inputs; Connecting Analog Inputs; Setpoint Potentiometer

Installation
05/06 AWB2724-1584GB
18
Connecting digital inputs
Use input terminals I1 to I12 to connect pushbutton actuators,
switches or 3 or 4-wire proximity switches. Given the high residual
current, do not use 2-wire proximity switches.
Connecting analog inputs
Inputs I7, I8, I11 and I12 can also be used to connect analog
voltages ranging from 0 V to 10 V.
The resolution is 10-bit = 0 to 1023.
X Use shielded twisted pair cables to prevent interference with
the analog signals.
X With short cable lengths, ground the shield at both ends using
a large contact area. If the cable length is more than around 30
m, grounding at both ends can result in equalisation currents
between the two grounding points and thus in the interference
of analog signals. In this case, only ground the cable at one end.
X Do not lay signal lines parallel to power cables.
X Connect inductive loads that you are switching via the outputs
to a separate power supply or use a suppressor circuit for
motors and valves. If the controller is run with motors, solenoid
valves or contactors via the same power supply, the switching
may cause interference on the analog input signals.
The following circuits show examples of analog measuring
applications.
Setpoint potentiometer
Use a potentiometer with the resistance F 1 kO, e.g. 1 kO, 0.25 W.
Figure 13: Connecting digital inputs
i
Caution!
Observe the following when laying and connecting analog
cables:
L01⫹
L01⫺
0 V l1 I2 I7
...V
F1
0 V
l3 I4
l5 I6
...
h
Ensure that the reference potential is galvanically
connected. Connect the 0 V of the power supply unit for
the setpoint potentiometer and various sensors shown in
the examples with the 0 V of the power supply.
Figure 14: Setpoint potentiometer
Figure 15: Setpoint potentiometer with upstream resistor
Figure 16: Brightness sensor
L01⫹
L01⫺
0 V
+12 V
I724 V 0 V0 V
F1
I2I1
I4I3
I6I5
...
H
h
L01⫺
L01⫹
1.3 kO/0.25 W
1 kO/0.25 W
0 V 0 V I724 V
F1
...
I6
I2
I1
I4
I3 I5
0 V
0...10 V
12 V
L01⫹
L01⫺
0 V
+12 V
I724 V 0 V0 V
...
F1
I2I1
I4I3
I6I5
h
H