This transmitter will put your motor controllers into maintenance mode. Stop the signal and you'll be able to reset them back to normal.
The power to the transmitter goes through these two time delay relays and this piece of clockwork. That's three independent methods to ensure it will de energize after midnight. Also, after midnight, Max Post will be informed where you are.
Four layers of redundancy? Kind of light for an engineer.
I would have liked more, but I'm in a bit of a hurry.