User Manual

Page 16
ENS2
www.elektroautomatik.de
ea1974@elektroautomatik.de
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
Public grid
ENS2
R1 R2 R3 R4
N L1 L2 L3
K1 K2
N
L1
L2
L3
N
L1
L2
L3
Schütz 1
Contactor 1
Schütz 2
Contactor 2
Figure 9 - Wiring scheme of installation without feedback contact
Consumer(s)
2.2.2.2 Type 2: With feedback contact
Installation type 2 and its wiring uses 5-pole or 4-pole contactors with extra feedback contact. The feedback signal
helpsthesupervisioncircuitoftheAIUtodenitelydetectwhetherthecontactorshaveacted(makeorbreak)or
not. The main fuses on L1, L2, L3 in the schematic below are not part of the AIU unit. This type of installation is
especiallysuitableforbiggerinstallationswheretheversion“ENS2”isrequiredandwheretheinstallercandeter-
mine to use contactors with out without feedback contact.
Public grid
ENS2
R1 R2 R3 R4
N L1 L2 L3
K1 K2
N
L1
L2
L3
N
L1
L2
L3
Schütz 1
Contactor 1
Schütz 2
Contactor 2
Figure 10 - Wiring scheme of installation with feedback contact
Consumer(s)