Access control system

An access control system for preventing access to the underlying workings of a control panel comprising:

• a base member having an upper surface, a lower surface, and a bore extending from said upper surface to said lower surface;
• a base plate having two opposite sides, a plurality of fastening apertures and a bore, said base plate being fastened to said upper surface of said base member such that said bore in said base plate is aligned with said bore in said base member;
• a cover plate having an upper surface, a lower surface, and a bore extending between said upper and lower surfaces, said bore being aligned with said base plate bore when said cover plate is placed over said base plate;
• a dual key operated cylinder plug having a keyway on one end and connection means for coupling said cylinder plug to a rotation controlled device on the opposite end, said cylinder plug being disposed through said bores in said base member, base plate and cover plate, said dual key operated cylinder plug having a first operational mode that secures said cover plate over said base plate to prevent tampering with said cylinder plug, said first operational mode controlled by a control key that enables removal of the cylinder plug, and a second operational mode determined by a general key for access control.