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Honeywell • 6
3.
LonWorks technical data
3.1
General
Connections and
communications
Environment
Safety
3.2
Physical media and wiring
LONWORKS networks can be implemented on many different physical media. Drive OPT-C4
option board is equipped with an FT-X1 transceiver supporting the Free Topology transformer
coupled network, which allows the network wire to be connected as bus, star, loop or combi-
nation of these. This media reaches a communication speed of 78kBits/s. The FT-X1 transceiv-
er is compatible with Echelon's LPT-10 Link Power Transceiver, and these transceivers can
communicate with each other on a single twisted pair cable.
Termination
The doubly terminated bus topology is recommended to be used. However, also singly termi-
ated, star or loop topologies can be used with OPT-C4 option board.
Up to 64 FTT-10 transceiver nodes are allowed per network segment, the individual segments
can be connected together by a router. See Table 3 for possible cable types and cable lengths
for FTT-10. Even if unshielded cable types are possible to be used with this type of transceiver,
it is still highly recommended to use only shielded cables with frequency converters. At-
tention should be paid to proper grounding of the shield to ensure bus operation. Grounding of
the shield should be done at both ends of the cable.
Cable type
JY (St) Y 2x2x0.8 mm
LONAK 2x2x0,8 (shielded)
Interface
Channel type
Transfer cable
Baud rate
Ambient operating temperature
Storing temperature
Humidity
Altitude
Vibration
Fulfils EN50178 standard
Table 2.
Figure 1. Doubly terminated bus topology
Max. doubly
terminated bus
length
900 m
Table 3.
LonWorks technical data
Pluggable connector (5 mm)
TP/FT-10
Shielded Twisted Pair
78 Kbit/s
-10°C...50°C
-40°C...70°C
<95%, no condensation allowed
Max. 1000 m
0.5 G at 9...200 Hz
Max. free topology
wire length
500 m
Termination
Max. node-to-node
distance
320 m
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