Wilo Control EC-L Notice De Montage page 67

x
Fig. 9: Overview of connection symbol
6.5.6 Connection of signal transmitter
for level control device
off on
1 2 1
+
Fig. 10: Overview of connection symbol
4-20 mA
In
Fig. 11: Overview of connection symbol
Installation and operating instructions Wilo-Control EC-L
Installation
Leakage detection that uses a moisture probe can be connected for each pump. The
threshold (< 30 kOhm) for a deactivation is permanently stored in the switchgear. Do
not connect a float switch!
Insert the connection cable laid by the customer through the threaded cable connec-
tions and secure. Connect the wires to the terminal strip according to the connection
diagram. For details on the terminal number, see the overview of connections in the
cover. The "x" in the symbol states the respective pump:
▪ 1 = pump 1
▪ 2 = pump 2
▪ 3 = pump 3
DANGER! Risk of explosion due to incorrect connection! If the connected pumps are
used in potentially explosive atmospheres, observe the potentially explosive atmo-
spheres section in the appendix!
NOTICE
Do not apply external voltage!
An external voltage which is applied destroys the component.
Level measurement can be performed with three float switches, a level sensor or a dy-
namic pressure bell. Level measurement with electrodes is not possible!
Insert the connection cable laid by the customer through the threaded cable connec-
tions and secure. Connect the wires to the terminal strip according to the connection
diagram. For details on the terminal number, see the overview of connections in the
cover.
Float switch
A max. of two pumps can be actuated if float switches are used for level measurement.
The terminals are designated as follows:
off
Level, "All pumps Off"
1 + 2
on
Level, "Pump 1 On"
1
on
Level, "Pump 2 On"
on
2
2
DANGER! Risk of explosion due to incorrect connection! If the connected float
switches are used in potentially explosive atmospheres, observe the potentially ex-
plosive atmospheres section in the appendix!
Level sensor
A max. of three pumps can be actuated if level sensors are used for level measurement.
The connection value for the level sensor is 4 – 20 mA. NOTICE! Observe the correct
polarity of the level sensor! Do not connect active level sensors.
DANGER! Risk of explosion due to incorrect connection! If the connected level
sensor is used in potentially explosive atmospheres, observe the potentially explos-
ive atmospheres section in the appendix!
Dynamic pressure bell
A max. of three pumps can be actuated if a dynamic pressure bell is used for level
measurement. The pressure range for the dynamic pressure bell is 0 – 250 mBar.
en
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