Eaton easyControl EC4-200, User Manual

Page: 25 / 113

10/10 MN05003003Z-EN
21
5 Installation
Connecting the power supply
Cable protection
Protect the supply cables with a miniature circuit-breaker or at
least a 1A (slow blow) fuse (F1).
Connecting digital inputs
Use input terminals I3 to I4 to connect pushbutton actuators,
switches or 1 or 12-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 screened, twisted pair conductors, to stop interference of
the analogue 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 earth the
conductor on one side.
X
Don‘t lay the signal conductor parallel to the power conductor.
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.
Figure 15: Connecting the power supply
The two 0 V terminals are connected internally!
h
Die EC4-200 is protected against polarity reversal.
h
The necessary connection data is provided chapter
“Technical data”, page 96.
h
The controller behaves like a capacitor the first time it is
powered up. The switching device and the supply device
for switching on the power supply must be designed for
this, i.e. no Reed relay contacts, no proximity switches.
...V 0 V 0 V
L01 –
F1
L01 +
DC : +24 V
I1 I3 I2 I4 I6 I5 I7
...
Figure 16: 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
...