Cable of interface RS-422/485, 2x2x24 AWG SFTP, 120 Ohm, covered with corrugated steel armour, in light-stabilized polyethylene jacket, for operation in the expanded temperature range

1 – Jacket 2 – Corrugated steel armour 3 – Inner jacket 4 – Shield-foil 5 – Shield-braid 6 – Stranded twisted pair

Description

The cable with wave impedance of 120 Ohm designed for the applications like RS-485 and RS-422…common polyester aluminum foil and copper braid shield, covered with the double jacket. The cable is designed for operation in the expanded temperature range, for fixed and non-stationary cabling. Due to the corrugated steel armour protecting from rodents and due to the light-stabilized polyethylene jacket this type of cables is suitable for direct burial application. The cable complies with UL 1581 VW-1, IEC 60332.1.

Materials

Conducting material: tinned copper wire, stranded. Core insulation: monolithic polyolefin Shield: tinned copper wire braid, braid coating density -100%, sheath coating density 90% Inner jacket: fire-resistant PVC-compound Armour: corrugated steel armour Jacket: light-stabilized fire-resistant polyethylene compound

Technical characteristics

Conductor (core) diameter	7 x 0.203 mm (7 x 0.008") (24 AWG)
The first jacket diameter	7.3 mm (0.29")
The second jacket diameter	9.5 mm (0.37")
Cable outer diameter	13.3 mm (0.52")
Cable weight per 1000 ft	59.4 kg (132 lbs)
Operation temperature	-55°C – +80°C (-67°F – +176°F)

Electrical characteristics:

Direct-current resistance at 20°C (68°F)	94 Ohm/km (151.28 Ohm/mile)
Electric capacity at 1 kHz	42 pF/m (12.80 pF/ft)
Wave impedance at 1 MHz	120 ± 15 Ohm
Propagation velocity	66%, or more
Voltage rating	230 V
Dielectric breakdown strength	1000 V/1 min

Ordering:

RS-SF2-A-PE	Cable of interface RS-422/485, 2x2x24 AWG SFTP, 120 Ohm, covered with corrugated steel armour, in light-stabilized polyethylene jacket, for operation in the expanded temperature range
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