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1
1
.
.
3
3
L
L
O
O
N
N
W
W
O
O
R
R
K
K
S
S
D
D
a
a
t
t
a
a
C
C
a
a
b
b
l
l
e
e
s
s
• The L
ON
W
ORKS
1
data cables must be double twisted-pair cables
• In a free topology configuration, the overall length of the sections must not
exceed 500m
• In a bus configuration, the overall length of the sections must not exceed
2700m
• In the free topology configuration, the 50ohm terminator must be enabled
by inserting the appropriate jumper into the FTT10A plug-in on the CTU-
PLG06 board inside the TemaServer
• In a bus configuration, two terminators must be inserted at the two ends of
the bus (resistance of 100ohm 1% ½W)
• The L
ONWORKS
1
data cables must be dimensioned according to the
indications in Table 1
Cable Type Extension [m] based on cable capacitance
AWG mm
2
Ohm/Km 50nF/Km 100nF/K
m
200nF/K
m
500nF/K
m
1uF/Km
12 3.3 5.7 2676 1892 1338 846 598
14 2 8.8 2153 1523 1077 681 482
16 1.3 14 1707 1207 854 540 382
18 0.9 21 1394 986 697 441 312
20 0.6 34 1096 775 548 346 245
22 0.35 52 886 626 443 280 198
24 0.2 85 693 490 346 219 155
Table 1: Length/Capacitance of L
ON
W
ORKS
1
Cables
• The FTT10A Echelon
v1.2 User’s Guide suggests using the cables as
indicated in Table 2.
Make and Model AW
G
Bus
Connection
Max Length
total [m]
Free Topology
Connection Node-
to-Node Max
Length [m]
Free Topology -
Connection
Max Length total
[m]
Belden 85102 16 2700 500 500
Belden 8471 16 2700 400 500
Level IV (twisted pair,
solid, unshielded)
22 1400 400 500
JY (St) 2x2x0,8 (4
solid wires, spiral-
twisted, shielded)
20 900 320 500
TIA Cat5 / 900 250 450
Table 2: Suggested LONWORKS
Cables
1
LONWORKS
®
is a trademark of the Echelon Corporation