NF2a
NF2b
NF1a
NF1b
Z
0
Z
0
A1
A1
E1
E1
A2
A2
E2
E2
S
P
A1
A1
E1
E1
A2
A2
E2
E2
S
P
T-T
T-R
NF2
NF1
Receive
Transmit
LF signal transformer
OVP
OVP
Figure 6: Communication line connection by LF transformer (four-wire connection)
ABB Power Grids Germany AG
P.O. Box 10 01 64
68128 Mannheim, Germany
Tel. +49 621 381-3000
www.abb.com/remote-terminal-units
We reserve the right to make technical
changes or modify the contents of this
document without prior notice. With
regard to purchase orders, the agreed
particulars shall prevail. ABB Power
Grids Germany AG does not accept any
responsibility whatsoever for potential
errors or possible lack of information in
this document.
We reserve all rights in this document and in
the subject matter and illustrations contained
therein. Any reproduction, disclosure to third
parties or utilization of its contents – in whole
or in parts – is forbidden without prior written
consent of ABB Power Grids Germany AG.
Copyright© 2019 ABB Power Grids Germany AG
All rights reserved
1K
G
T1
50
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7
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0
0
1
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