Danfoss FC 100 Operating Instructions Manual page 13

4 How to install
4
4.1.3 Network Termination
Dependent on the type of topology, at least one of the connected nodes must be terminated (52.5Ω). The option has two built-in termination circuits
which are activated by the terminator switches S300 and S301.
If termination is provided elsewhere in the network, the termination switches should be OFF. If a double-terminated bus topology is used, the first and
the last node should be double-terminated (105Ω).
Termination switch positions are shown in the table below.
Termination type
No termination (factory setting)
Double termination (105 Ω)
Single termination (52.5 Ω)
12
S 300
OFF
ON
ON
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VLT® FC 100 LonWorks
S 301
OFF
OFF
ON