Depending on the field of application, cables in different colors are offered for setting up FOUNDATION Fieldbus H1 networks in accordance with IEC 61158-2:

• FOUNDATION Fieldbus Cable, 2-wire, shielded, yellow sheath:
  for applications in a non-intrinsically safe area

• FOUNDATION Fieldbus Cable, 2-wire, shielded, blue sheath:
  for applications in an intrinsically safe area