Thanks for providing no further detail, that was totally unhelpful.
It looks like it should work like, well, any other trapped key interlock.
Two sets of safety contacts indicate that the key is in, possibly inserted and locked. One contact indicates that the key is unlocked, and one probably indicates that the solenoid is energized.
The coil is either to LOCK the switch in the closed position, or enable it to be OPENED when it is locked closed. I don't know the exact model of the switch, but your best bet, as always, is type the model number into google, and get a datasheet. That should explain everything.