IEC/ ISA Standard


Thread Starter


Can anyone plz guide me if there is a specific IEC/ ISA or some other standard which details usage of delay timers in logics specifically on interlocks.

Also, which standard can assist me in correctly identifying the type of tappings (single for two elements or otherwise) in voting systems (2oo3, 2oo4, 2oo2 etc.). I am aware that you cannot use single tapping for PTs/ LTs etc.; however what is the position on using dual element TIs in single thermowell participating in voting logic?

Look forward to some healthy feedbacks.