score:8
There are two types of nirvana: saupādisesa-nibbāna (nirvana with remainder) and anupādisesa-nibbāna (nirvana without remainder) (Iti. 44).
It is true that for one who has attained anupādisesa-nibbāna there will be no more consciousness. This is because someone who has attained anupādisesa-nibbāna is dead*. It is the equivalent to the more familiar parinibbāna - "complete" nirvāna. For one who has attained saupādisesa-nibbāna, there is still the physical and mental formations that have been created as a result of being born as a human that need to work themselves out, including consciousness.
* Conventionally speaking; technically, they have become free from death, since they have become free from birth (arising).
Upvote:1
I will answer your second question regarding enlightened beings feeling pain.
An arahat / Buddha does not create any new kamma, but they are still subject to the maturing of past kamma. This means that they can suffer physical pain but unlike us, there is no associated mental pain. See Sallatha Sutta (SN 36.6).
Upvote:6
When the mind takes Nibbana as the object, all experiencing cease. But when enlightened beings do day to day activities, Nibbana is not the object of the mind. They do feel pain since there is experiencing. But they do not suffer. Being conscious of the pain is different from suffering due to pain.