PLC Based Cascading Duplex electrical control panel suitable for two vacuum pump(10 / 7.5 / 5 HP) and two compressor (15 / 7.5 / 5 HP).Electric control panel with duplexing and cascading facility of air compressor and vacuum pumps which are powder coated and electric panel is made from CRCA sheet with independent starting units with 100 ampere MCCB with spreader links of 100 ampere as incomer including rotary handle, Amp/Volt/Freq meter with required CT's , Indication lamp, push button, programmable logic controller, SMPS 1.5 A to 2.1 A , control relay, contactors of required ratings ,timer, three phase and single phase MCBs as required, single phase preventer, over load protection relay, with required Star-delta/ DOL starter including control wiring.