LONWORKS( Data Cables Page 11
LONWORKS
Data Cables
• The LONWORKS
1
data cable must be twisted pair
• In a free topology configuration, the sum total of the sections must not
exceed 500m
• In a bus configuration, the sum total of the sections must not exceed
2700m
• In a free topology configuration, activate the 50ohm terminator by placing
the appropriate jumper on the FTT10A plug-in of the CTU-PLG06 board
inside the TemaServer
• In a bus configuration, place two terminators (with resistance values of
100ohm 1% ½W) at each end of the bus
• Check that the length of the L
ONWORKS
data cable corresponds to the
norms indicated in Table 1.
Type of cable Length [m] in relation to cable capacity
AWG mm2 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/capacity of LONWORKS
data cables (m)
1
LONWORKS
®
is a trademark of Echelon Corporation
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