Caledonian RS 485 SWA Cables Specification
Steel Wire Amoured RS485 PVC Jacket Cable
APPLICATIONS
With low capacitance and high propagation speed properties, and its high immunity against external interference, this cable is suitable for extended distance transmission and applications where low signal distortion is required.
STANDARDS
EIA/TIA 485
CABLE CONSTRUCTION
Conductor: 1.5mm2 Stranded bare copper wire.
Insulation: Conductors are insulated with a layer of extruded normal PE
Collective screen: 100% Al/polyester foil screen with 0.5mmsq stranded TC wires.
Inner Sheathing: An inner layer of extruded PVC compound is applied over the cable core.
Armour: Steel wire armour
Outer Sheathing: An outer protection of extruded PVC is applied over the armor.
ElECTRICAL PROPERTIES
| Nominal Impedance | 120±10Ω. |
| Nominal Capacitance Cond. to Cond. @1KHz | 50 nF/km |
| Nominal Capacitance Cond. to other Cond. & Shield @1KHz | 100 nF/km |
| Nominal Velocity of Propagation | 69% |
| Nominal Delay | 7.51319e-06s/km |
| Nominal Conductor DC Resistance @20℃ | 13.3 Ohm/km |
| Nominal Outer Shield DC Resistance @ 20 ℃ | 35.0 Ohm/km |
| Nominal Attenuation | 1MHz 0.35dB/km |
PHYSICAL AND THERMAL PROPERTIES
Temperature range during operation (fixed state): -30°C – +80°CTemperature range during installation (mobile state): -5°C – +50°C
Minimum bending radius: 10 × Overall Diameter
CONSTRUCTION PARAMETERS
| Number of Pairs | Conductor Size (mm2) | Nominal Dia under Armour (mm) | Armour Wire Dia (mm) | Thickness of Outer Jacket (mm) | Diameter of Cable (mm) | Appro. Weight (kg/km) |
|---|---|---|---|---|---|---|
| 5 | 1.5 | 16.1 | 1.25 | 1.7 | 22.0 | 940 |