Interbus 3 pair (optional 3 core)

Interbus cable is designed for remote applications. Available for data transmission with 3 pairs only or as composite cable with 3 data pairs plus an additional 3 power cores. 

Both the 3 pair and the composite 3 pair & 3 core options are available in standard or superfine (hi-flex) stranding. LSZH (low smoke zero halogen) and LSF (low smoke and fume) versions for increased fire safety are generally available on request.

Unlike traditional ring systems Interbus uses one cable to route data back and forth to all devices, each device or unit will amplify the signal before sending it on to the next station.

Note: low smoke zero halogen / halogen free (LSZH, LSOH, LSHF, OHLS) should not be confused with LSF (low smoke and fume), an in-depth explanation is shown on our LSZH Control Flex front page.


Construction – Interbus 3 pair (optional 3 core)
stranded plain copper conductors
polyethylene (PE) core insulation
24awg data cores twisted into 3x pairs
18awg power cores (if included)
overall polyester tape
overall plain copper wire braid
green or violet PVC outer sheath as standard


Technical -Interbus 3 pair (optional 3 core)
conductor make-up: data cores stranded 7x 0.20mm or 32x 0.10mm
power cores stranded 19x 0.26mm or 56×0.15mm (if included)
as AWG chart, see Stranding/Resistance page
voltage rating: 300V operating
impedance: 100 Ohm (data pairs)
capacitance: 51pF/m core to shield (data pairs)
temperature range: -30°C to +70°C static, -5°C to +50°C  (standard PVC versions)
core identification: pairs coloured brown & white, green & yellow, pink & grey
  power cores coloured red, blue & green (if included)


A printable specification is available here: Interbus 3 pair 24awg (optional 3 core 18awg).


For more bus cables return to the Fieldbus Cables front page.


All measurements should be considered nominal and images for illustration purposes only. Although Central Cables Ltd has made every reasonable effort to ensure its accuracy, the information contained herein is subject to error or omission and to change without notice. In no event will Central Cables Ltd be liable for any damages whatsoever, arising in connection with the information described.