LonWorks Communication Bus Fundamentals
Network Guide 57
In a bus topology, the maximum wire length is 1400 meters (4593 feet). The maximum stub
length on a TP/FT 10 channel is 3 meters (10 feet). A stub is a section of unterminated trans-
mission line that branches off the main transmission line of interest. The branch line is termi-
nated as an open circuit.
In a free topology, the maximum length is 400 meters (1312 feet) node-to-node and 500
meters (1640 feet) total wire length.
Type 2:
16 AWG (Ø1.3mm), 1 twisted pair (1P), stranded conductor (STR), tinned copper (TNC), PVC
insulation, PVC jacket, unshielded, plenum FT6, CSA 600V or UL 300V.
In bus topology, the maximum wire length is 2700 meters (8858 feet). The maximum stub
length on a TP/FT 10 channel is 3 meters (10 feet).
NEC Rating UL listed art 800 plenum
CSA Flame rated
Untwisted wires or cables containing flat or parallel untwisted conductors must not
be used on an L
ONWORKS twisted pair channel. The use of theses wires/cables may
result in improper network operation and could, in certain circumstances, result in
damage to nodes connected to such a channel.
In the event that the limits on the number of transceivers or total wire distance are
exceeded, then one FTT physical layer repeater can be added to interconnect two
segments and double the overall system capability.
Table 13: TP/FT 10 Type 2 Cable Attributes
Parameter Details
Conductor
Gauge (AWG)
16 AWG (see also Metric Conversions for Wire Gauge on page 133).
Conductor
Count
2 Conductors (twisted pair)
Conductor Type Stranded conductor
Material Tinned copper
Plenum Plenum rated
NEC Rating UL listed art 800 plenum
CSA Flame rated
Table 12: TP/FT 10 Type 1 Cable Attributes
Parameter Details
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