K1 is the 24V DC contactor. All the safety stuff will be run from the 24V DC supply, so the E-Stops will be 24V and NOT 240V. I've not yet drawn the latching circuit. The above drawing is only for the AC side of things and doesn't show any E-Stops. I do have a Pilz safety relay but am limited on space due to its height, so will use a contactor instead.