Steel wire armour (SWA)
Suitable for Fieldbus distribution circuits in RS 485 systems. Through this system a multiple-node net can be interconnected by means of a paired cable, which allows bi-directional communication, significant length of the interconnection cable and high speed data transmission. Installed in conduits, trays, cable ladders, in direct open air or indoors, buried in a trench or in ducts. It has additional mechanical protection.
Standard | ||
---|---|---|
Sheath | Conductors | |
1 Pair | ||
2 Pairs | ||
3 Pairs | ||
4 Pairs |
The information provided corresponds to the standard version, and different alternatives of insulation and / or covering can be used upon request.
Number of pairs | Gauge | Electrical resistance in D.C. at 20°C | Velocity of propagation | Impedancia característica | Mutual capacitance | Diameter under armour | External diameter | Weight | Code | |
---|---|---|---|---|---|---|---|---|---|---|
AWG | ohm/km | VP (%) | Ohm | pF/m | pF/ft | mm | mm | kg/km | ||
1 | 22 | 58.6 | 66 | 120 | 48 | 14.6 | 8.6 | 12.7 | 293 | SB 9801 H |
2 | 8.4 | 12.6 | 293 | SB 9802 H | ||||||
3 | 9.1 | 13.2 | 321 | SB 9803 H | ||||||
4 | 10.3 | 14.4 | 376 | SB 9804 H |
pF/m: Mutual Capacitance between conductors of the same pair, expressed in picofarad per meter. pF/ft: Mutual Capacitance between conductors of the same pair, expressed in picofarad per feet.