Profibus PA single pair 18awg cable

Profibus PA single pair cable is designed for use in industries such as chemical, food, beverage, oil, gas and refining, pulp and paper, metals, mining and minerals. They can be supplied with steel wire armour (SWA) for protection against mechanical damage.

Armoured (SWA) versions are suitable for direct burial and LSZH provides increased safety in the case of fire.  

The Profibus (process field bus) protocol has been widely adopted for production and process automation applications providing transmission rates up to 12Mbits/sec.

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 – Profibus PA single pair
18awg solid or stranded plain copper conductors
foamed polyethylene (FPE) core insulation
cores twisted together
 collective aluminium/polyester foil tape (CAT) screen
overall tinned copper wire braid (TCWB) screen 
outer sheath material varies


Technical – Profibus PA single pair
conductor stranding: solid = 1x 1.05mm diameter
  flexible = 7x 0.25mm diameter
as AWG chart, see Stranding/Resistance page
bend radius: flexible versions (excludes SWA) = 10x overall diameter (O/D)
operating voltage: solid = 100V, flexible & hi-flex = 300V
impedance: 100 Ohms (±20Ω) @ 31.25 kHz
temperature range: dependent on sheath material
core identification: coloured red & green


A printable specification is available here: Profibus PA cable; single pair 18awg blue/black.


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.