230v heatbed protection (no replies)

Hello everyone.

My printer is equipped with 230v silicon heatbed and I want to make an additiona protection in case of SSR fails
I mean is it possible to add an extra code for switch power OFF when heatbed will exceed 150C
of course I have activated POWER_SUPPLY and additional circuit with relay for switching the printer on and off using M80 and M81
eg.

If heatbed_temperature >= 150
then PS_power_OFF

Thanks a lot for reply