10 TK_S014 – Installation Manual
24 0,2 85 693 490 346 219 155
Table 2. Length/Capacity of LONWORKS
Data Cables (m)
The FTT10A Echelon
v1.2 User Guide recommends the cables indicated in Table 3.
Producer and Model AWG Connection to bus
-maximum total
length [m]
Connection in
free topology –
maximum node-
node length
max. [m]
Connection in free
topology –
maximum total
wire length. [m]
Belden 85102 16 2700 500 500
Belden 8471 16 2700 400 500
Level IV (twisted-pair,
typically solid and
unshielded)
22 1400 400 500
JY (St) 2x2x0.8 (4-wire
helical twist, solid
shielded)
20 900 320 500
TIA Cat5 / 900 250 450
Table 3. Recommended LONWORKS
Cables
Input wires
Use a twisted pair cable for the contacts connections.
For outdoor wiring is mandatory to use shielded cables. The cables’ shielding must be connected to the
respective ground connectors (-V).
For internal wiring without shielded cables is recommended an electrical environment where the cables are
well separated, even at short runs, especially to whom can be essentially subjected to interference.
The following table lists wire gauges and distances for Inputs.
Cable type Max distance (m)*
AWG mm2 Ohm/km
12 3.3 5.7 2193
14 2 8.8 1420
16 1.3 14 893
18 0.9 21 595
20 0.52 34 368
22 0.35 52 240
24 0.2 85 147
26 0.13 137 93
Table 4 Length of Input cables
*One-volt voltage drop is considered typical.
Readers wires
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