For bus systems such as Modbus, SUCOnet, Modulink, VariNet. Flame-retardant, UL approval, colour code according to DIN 47100. Temperature range from -40°C to +80°C

LD is a LAPP abbreviation for long distance

Industrial machinery and plant engineering Automation & fältinstallation

Article number Article designation Number of pairs and mm² per conductor Outer diameter [mm] Copper index (kg/km) Weight (kg/km)
for fixed installation
UNITRONIC® BUS LD 1 x 2 x 0.22 5.7 18 37
UNITRONIC® BUS LD 2 x 2 x 0.22 7.1 28 45
UNITRONIC® BUS LD 3 x 2 x 0.22 7.2 37 72
For fixed installation - UL/CSA CMX certification
UNITRONIC® BUS LD A 1 x 2 x 0.22 5.7 18 39


  • Suitable for multiple bus systems based on RS485 / RS422

Application range

  • For fixed installation
    Maximum electromagnetic screening
  • Bus cables for bus systems such as Modbus, SUCOnet P, Modulink P, VariNet-P)
  • Dry or damp rooms

Product features

  • The stated bit rates result in the following cable lengths (maximum) for a bus segment:
  • 9.6-93.75 kbit/s = 1200m
  • 187.5 kBit/s = max. 1000 m
  • 500 kbit/s = max. 400 m
  • Flame-retardant according to IEC 60332-1-2

Norm references / approvals

  • UL version with certification: UL/CSA type CMX in accordance with UL 444 and CSA C22.2 no. 214-02


  • 7-wire strand, bare, colour-coded according to DIN 47100
  • Copper braiding
  • PVC sheath
  • Colour: violet (RAL 4001)
  • UNITRONIC® BUS LD A like UNITRONIC® BUS LD, but with UL/CSA certification


  • ETIM 5.0 Class-ID: EC000830
  • ETIM 5.0 Class-Description: Data cable

Operating capacitance

  • Flexible use: 10 x outer diameter

Peak operating voltage

  • (not for power applications)
    250 V

Conductor resistance

  • (loop): max. 186 ohm/km

Minimum bending radius

  • Fixed installation: 8 x outer diameter

Test voltage

  • Core/Core: 1500 V eff.

Characteristic impedance

  • 100 – 120 ohm

Temperature range

  • Fixed installation: -40°C to +80°C
  • Flexing: -5°C to +70°C

Unless otherwise specified, the product values shown are nominal values. You can receive further values, such as tolerances, upon request if they available and have been released for publication.
Copper price basis: EUR 150/100 kg; see catalogue appendix T17 for the application and definition of "Metal price basis" and "Metal index"
Please find our standard lengths at: www.lappkabel.de/en/cable-standardlengths
Packaging: Ring ≤ 30 kg or ≤ 250 m, otherwise drum
Please specify the preferred packaging (e.g. 1 x 500 m drum or 5 x 100 m rings)
Modubus is registered by the Modbus-IDA Organisation. SUCOnet P is a registered trademark of the Moeller Group. Modulink P is a registered trademark of Weidmüller GmbH & Co. VariNet is a registered trademark of Pepperl+Fuchs GmbH
Photographs are not to scale and do not represent detailed images of the respective products.