Just bought the new RT702C to test if I could make it compatible with the remote control panel. Just received it and ripped it apart. Looks like it should be quite simple to make it compatible with the remote control panel or other relay / SSR setup.
The controller is sadly not reasonable accessible for modding, its all potted. This is probably not interesting anyway, I think the anti-restart function is a software controlled function inside the microcontroller firmware. There’s a blue wire going from the switch to the electronic unit. This is a power sensor wire for the build in micro controller. If there’s power on this wire at powerup, then the router refuses to start. Simplest solution is to switch the router with this wire, and leave the router powered. Looks like it works fine but needs an extra wire to the router: “Live”, “neutral” and “switched live” (to the blue wire).
You have to make sure the wire to the relay that is switching the blue wire, is exactly the same wire that goes to the switch. If you connect neutral to it, and the switch has live then you might short circuit and blow up the electronics.
One thing of concern by going this route, is that the router is software controlled (with the build in Makita microcontroller). Might be a safety concern. Always use the switch to hardware-disable the router.
Another solution might be adding a short delay timer between the switch and the blue wire. But I don’t think this will fit inside the router. (it’s already cramped).