This part of IEC 61202 applies to isolators used in the field of fibre optics, all exhibiting the following features: they are non-reciprocal optical devices, in which each port is either an optical fibre or fibre optic connector; they are passive devices containing no opto-electronic or other transducing elements; they have two optical ports for directionally transmitting optical power.
IEC 61202-1:2016 Referenced Document
IEC 60027-1:1992 Letter symbols to be used in electrical technology; part 1: general
IEC 60027-2:2005 Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics
IEC 60027-3:2002 Letter symbols to be used in electrical technology - Part 3: Logarithmic and related quantities, and their units
IEC 60027-4:2006 Letter symbols to be used in electrical technology - Part 4: Rotating electric machines
IEC 60027-6:2006 Letter symbols to be used in electrical technology - Part 6: Control technology
IEC 60027-7:2010 Letter symbols to be used in electrical technology - Part 7: Power generation, transmission and distribution
IEC 60050-731:1991 International electrotechnical vocabulary; chapter 731: optical fibre communication