kenwood120s:
Can't you just use a 7809?I'm very curious what you're doing with this requirement to control an Arduino's power with a PLC!
PLC will control different linear actuators. They will be activated with different Banner Optical-Touch buttons. However, one of the actuators is small.. its Actuonix L12-R, and I want it to be controlled by arduino and only powered by PLC when permitted.
BTW 7809 looks cool.