Further safeguards against interference and surges generated by the coils can be turned on high power Zener diode, switched to ground <0V>; a plus voltage relays <; +12 V>; in the reverse direction.
Ulinzi zaidi dhidi ya kuingiliwa na surges yanayotokana na coils inaweza akageuka juu ya diode high nguvu Zener, switched chini <; 0V>;; plus voltage RELAYS <;; 12 V>;; katika mwelekeo reverse .