Rain Bird® F47125 LXIVMSD Surge Protector 2-Wire Field Device for ESP-LXIVM Series Controllers. The ESP-LXIVM Series controller is our most advanced irrigation controller offers fast and error-free installation, world-class diagnostics, and an updated version of the Industry’s favorite programming interface. The ESP-LXIVM supports up to 60 stations standard or 240 stations with LX-IVM Pro. Up to four 2-Wire paths can be connected, plus flow sensing and advanced flow management tools that set new industry standards for state-of-the art water management.