How to add a 24 volt power supply


Hi there i bought the above relay which changes the 12 volt supply to 24 volt but i have just realized that the k8200 is a 15volt supply can anyone tell me a simple way to reduce from 15 v to 12 v


the above is a diagram of how the switch works.

I guess 15V as signal in stead of 12V won’t be a problem