Questions from a PLC newbie, for Opta

Official Hardware Opta
4

Hello,
Here's what I can do for you:

  1. When you configure an input as Digital Input, the Opta internal circuit gives a low state when the voltage is below 4.46 VDC and a high state when the voltage is above 6.6 VDC. Between the two the state is unstable and cannot be guaranteed.
  2. There is no risk of electric shock with a voltage of 24 VDC. It becomes dangerous above 48 VDC.
  3. According to this comment the only problem is that it saturates above 10V.