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The length statements in the tables above are valid for bus cable with the following properties:
- Impedance: 135 to 165 Ohm at a measuring frequency from 3 to 20 MHz
- Resistance: <110 Ohm/km
- Capacitance: <30 pF/m
- Damping: max. 9 dB over the whole wire length
-
Cross section: max. 0.00053 in
2
[0.34 mm
2
], corresponding to AWG 22
- Cable type: twisted in pairs, 1 x 2, or 2 x 2, or 1 x 4 wires
- Shielding: Copper-braided shield or braided shield and foil shield
Use of the same cable type throughout the entire segment is recommended to avoid impedance mismatch.
How to Install
TR200 BACnet 3-3