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LONWORKS® BUS WIRING GUIDELINES
® U.S. Registered Trademark
© 2008 Honeywell International Inc.
74-2865—04 K.K. Rev. 11-08
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9
Honeywell GmbH
Böblinger Straße 17
D-71101 Schönaich
customer.honeywell.com
Table 5. Echelon Generic Cable Specification For Belden 85102 Equivalent, Stranded Twisted Pair 16 AWG (1.5 mm
2
).
Cable Termination
The FTT network segment requires termination for proper
data transmission performance. Use a 209541B FTT
termination module. Free topology (singly terminated)
segments use the yellow and brown wires. Daisy-chain
(doubly terminated) segments use the orange and brown
wires. See Fig. 4.
Fig. 4. 209541B FTT termination module.
Free Topology (Single Termination)
Network Segment
In a free topology segment (singly terminated) only one
termination is required and the termination can be placed
anywhere on the free topology segment. See Fig. 1 and 5.
Fig. 5. Physical connection of module
for a single termination network.
Daisy-Chain (Double Termination)
Network Segment
In a daisy-chain free topology segment (doubly terminated)
two terminations are required, one at each end of the FTT
daisy-chained network segment. See Fig. 6 and 7.
Fig. 6. FTT termination module wiring for
double termination network topology.
Fig. 7. Physical connection of modules
for a double termination network.
L
ONWORKS®, Neuron®, LONMARK® and LONMARK® logo are
registered trademarks of Echelon® Corporation.
Minimum Typical Maximum Units Condition
DC Resistance, each conductor 14.0 14.7 15.5 Ohms/km 20°C per ASTM D 4566
DC Resistance Unbalance 20°C per ASTM D 4566
Mutual Capacitance per ASTM D 4566
Characteristic Impedance 92 100 108 Ohms 64 khz to 1 Mhz, per ASTM D 4566
Attenuation
20 khz 1.3 Db/km 20°C per ASTM D 4566
64 khz 1.9
78 khz 2.2
156 khz 3.0
256 khz 4.8
512 khz 8.1
772 khz 11.3
1000 khz 13.7
Propagation Delay 5.6 Nsec/m 78 khz
M12198
YELLOW
ORANGE
BROWN
M12200
YELLOW
ORANGE
L
ONWORKS
-BUS
BROWN
TERMINATION
MODULE
TERMINATION
MODULE
DEVICE DEVICE
DEVICE
(DAISY CHAINED) (DAISY CHAINED)
DEVICE
DEVICE
M12199
M12201
ORANGE
YELLOW
L
ONWORKS-BUS
BROWN
ORANGE
YELLOW
L
ONWORKS-BUS
BROWN