System Performance; System Specifications; Transmission Specifications; Cable Specifications - Trane LonWorks



TR1 Series VFD Installation And Operation Manual

System
Free topology system specifications and
Performance transmission specifications are described
below. Both specifications should be met to
ensure proper operation.
The transmission specification depends on such
factors as resistance, mutual capacitance and
the velocity of propagation.
System
• The average temperature of the wire
Specifications
must not exceed 131° F. Individual
segments of wire may be as hot as
185° F.
Transmission
Free Topology nodes run at 78 kbps
Specifications
transmission speeds.
Cable
Trane recommends the use of shielded
Specifications
LonWorks communication cable, for example
Free
Topology
Specifications
Doubly-
Terminated
Bus
Belden 85102
Topology
Belden 8471
Specifications
Level IV, 22AWG
JY (St) Y 2x2x0.8
*Trane 400-2024
*Recommended
8
The following specifications are for
one network segment. Multiple
segments may be combined using
repeaters to increase the number of
nodes and distance.
aximum
node-to-node distance
Belden 85102
Belden 8471
Level IV, 22AWG
JY (St) Y 2x2x0.8
*Trane 400-2028
aximum bus length for
segments with
FTT-10 transceivers only and LPT-10 transceivers
The system designer may choose from a variety
of cables, depending on cost, availability, and
desired performance. Performance may vary
with cable type. Contact Echelon for cable types
and the characterization of system performance.
Note
• Up to 64 FTT-10 transceivers are allowed
per network segment.
18 guage shielded twisted pair, tinned-copper
conductors (Trane "purple" wire).
aximum
total wire length
1650 ft
1300 ft
1300 ft
1050 ft
1300 ft
aximum bus length for
segments with both FTT-10
8850 ft
8850 ft
4500 ft
2950 ft
4500 ft
1650 ft
1650 ft
1650 ft
1650 ft
1650 ft
7200 ft
7200 ft
3800 ft
2450 ft
3800 ft