This part of IEC 60869 applies to fibre optic power control devices. These have all of the following general features: They are passive in that they contain no opto-electronic or other transducing elements; They have two ports for the transmission of optical power and control the transmitted power in a fixed or variable fashion; The ports are non-connectorized optical fibre pigtails, connectorizied optical fibres or receptacles. This standard establishes generic requirements for the following passive optical devices: Optical attenuator; Optical fuse; Optical power limiter.