Danfoss VLT FC 100 Manual page 12

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
(105Ω). 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
(52.5Ω).
Termination switch positions are shown in the table below.
Termination type
No termination (factory setting)
Single termination (105 Ω)
Double termination (52.5 Ω)
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S 300
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VLT® FC 100 LonWorks
S 301
OFF OFF
ON OFF
ON ON