I am by no means an electrical engineer, so I'm guessing that there is a pretty simple solution to this problem and I'm just being thick about it.
In general, I want to read the voltage of 4 different relays into cDAQ module NI 9402. This particular DI/O module has a voltage read limit of 5V, but since all relays will be operating at 12V, I'm wanting to step down to 3V3. Essentially, the NI module will read the voltage as either 3V3 or 0V thus providing info to the state (open or closed) of the power relay(s).
After some basic googling and looking through parts on digikey and mouser, I'm having a difficult time finding power converters that can handle 12V --> 3V3. Is this too large of a step-down for a single unit to achieve? Wondering if I'll need to go from 12V --> 5V --> 3V3? Help is much appreciated, Thanks!!
Don't think it's required information, but here is the particular relay that I'm working with: https://www.digikey.com/product-detail/en/phoenix-contact/2906224/277-14896-ND/5699611