Is M340 and M580 or Quantum can be install in SIL1 application?
M340 is not and will be not certified SIL1.
The only range with SIL certification is Quantum. It is certified upto SIL3. So the Quantum family (140cpu67160s, 140cpu65160s) could be used upto sil3 application. M580 is planned to have SIL certification (2017) in future but not with the present offer.