Product Overview

The Belden 9842 RS-485 Multi-Pair Cable is designed for industrial and commercial applications requiring reliable communication over long distances. With its tinned copper conductors, overall foil and braid shielding, and durable PVC jacket, this cable is ideal for RS-485 serial communication, PLCs, VFDs, HMIs, and SCADA systems in noisy environments. It is well-suited for low-voltage digital control, line-level audio, and panel wiring applications. Data Sheet

Belden 9842 Specifications

Construction Details

• Conductor:
  • No. of Elements: 2 Pairs
  • Size: 24 AWG (7×32 Stranded)
  • Material: Tinned Copper (TC)
• Insulation:
  • Material: Polyethylene (PE)
  • Thickness: 0.022 in (0.56 mm)
  • Diameter: 0.068 in (1.7 mm)
  • Color Code: White/Blue Stripe & Blue/White Stripe, White/Orange Stripe & Orange/White Stripe
• Shielding:
  • Tape: Bi-Laminate (Aluminum + Poly) (100% coverage)
  • Braid: 90% Tinned Copper (TC)
  • Drain Wire: 24 AWG (7×32) TC
• Outer Jacket:
  • Material: Polyvinyl Chloride (PVC)
  • Thickness: 0.035 in (0.89 mm)
  • Nominal Diameter: 0.340 in (8.64 mm)

Belden 9842 Electrical Characteristics

• Nominal Conductor DCR: 24 Ohm/1000ft
• Capacitance:
  • Cond-to-Cond: 12.8 pF/ft (42.0 pF/m)
  • Cond-to-Other (Cond + Shield): 23 pF/ft
• Nominal Impedance: 120 Ohm
• Nominal Velocity of Propagation: 66%
• Maximum Current: 2.1 Amps per conductor @ 25ºC
• Nominal Outer Shield DCR: 2.2 Ohm/1000ft (7.2 Ohm/km)

High Frequency Performance

• Frequency: 1 MHz
• Nominal Attenuation: 0.6 dB/100ft

Voltage Ratings

• UL Voltage Rating: 300 V (CM), 30 V (UL AWM 2919)

Mechanical Characteristics

• Operating Temperature: -30°C to +80°C
• Bend Radius:
  • Stationary Minimum: 3.5 in (89 mm)
  • Installation Minimum: 3.5 in (89 mm)
• Max. Pull Tension: 87 lbs (39 kg)
• Bulk Cable Weight: 49 lbs/1000ft

Standards and Compliance

• Environmental Suitability: Indoor
• Flammability Ratings: UL 1685, IEC 60332-1-2
• CPR Compliance:
  • Euroclass: Eca
  • UKCA Class: Eca
• NEC / UL Compliance: Article 800, CM
• AWM Compliance: AWM 2919
• CEC / C(UL) Compliance: CM
• European Directive Compliance:
  • EU CE Mark
  • EU Directive 2015/863/EU (RoHS 2 Amendment)
  • EU Directive 2011/65/EU (RoHS 2)
  • EU Directive 2012/19/EU (WEEE)
• UK Regulation Compliance: UKCA Mark
• APAC Compliance: China RoHS II (GB/T 26572-2011)
• Other Standards: DMX-512

Plenum & Non-Plenum Variants

• Plenum Numbers: 82842, 89842
• Non-Plenum Number: 9841ZH

Key Features

• High-Performance Conductors: 2 pairs of 24 AWG stranded tinned copper for optimal signal transmission.
• Enhanced Shielding: Beldfoil® aluminum-polymer tape (100% coverage) and 90% tinned copper braid for superior noise immunity.
• Durable PVC Jacket: Provides flexibility and protection in industrial environments.
• Optimized for RS-485: 120-ohm impedance ensures compatibility with RS-485 networks.
• Versatile Applications: Suitable for serial communication, industrial automation, and low-voltage analog and digital signals.
• Certified for Compliance: Meets NEC, UL, CE, RoHS, UKCA, and China RoHS II standards.

Belden 9842 Part Numbers

• 9842.0030: Chrome, Reel, 30 m
• 9842 060100: Chrome, Reel, 100 ft
• 9842.009999: Chrome, Reel, 151 m
• 9842.00152: Chrome, Reel, 152 m