We have a legacy winch system that was built back in 1975, we are looking to replace all the controls (electrical) on this and bring it up to a more modern standard. Mainly due to all the control being obsolete.
Do we have to fully look at the functional safety of the complete winch (electrical & hydraulic) to bring it into line fully with IEC61508 / IEC61511 , or can we just look at it from the Electrical side only and use the ALARP priniciple to say its to expensive to replace all the hydrailics as well?
Do we have to fully look at the functional safety of the complete winch (electrical & hydraulic) to bring it into line fully with IEC61508 / IEC61511 , or can we just look at it from the Electrical side only and use the ALARP priniciple to say its to expensive to replace all the hydrailics as well?