ABB EDS500 Series Operating Instructions Manual page 6

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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
NF2a
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NF2b
NF1a
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OVP
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NF1b
LF signal transformer
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responsibility whatsoever for potential
errors or possible lack of information in
this document.
NF2
NF1
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