The Automation Direct Koyo DirectLogic 405 PLC family provides a process control system which is notable for the power it generates in relation to its small size and the low prices at which it available. The DL405 is made up of three CPU's; the DL430, DL440, and the DL450.All Model come equipped with A built-in power supply Communication ports A large program memory Advanced diagnostics Specialty F4 modules are cross listed between Automation Direct and Facts Engineering.