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How to install
Cabling
The Free Topology Transceiver (FTT) is designed to support double terminated line topology.
The LonWorks option is equipped with the FT-X1 transceiver for improved EMC performance. Flexible wiring
capability simplifies system installation and makes it easy to add nodes for system expansion.
The figure below illustrates the line network topology.
Network Termination
In the line topology, the two nodes at each end must be terminated. 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.
Termination switch positions are shown in the table below.
Termination type
No termination (factory setting)
Double termination (105 Ω)
Connecting the Bus Line
Connect bus wire NET A to terminal 79 and NET B to 80 of the terminal connector.
Terminal
NOTE
**Note: Term. 61 (Drain) offers a RC junction to ground and should not be used for grounding of shielded cable. Ground
the shielded cable at the de-coupling plate by removing cable insulation at contact point.
4-2
79
80
61
S 300
OFF
ON
Connection
NET A*
NET B*
Drain**
S 301
OFF
OFF
TR200 LonWorks
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