Housing for a rack mountable power supply for use with a programmable logic controller

A housing including a power supply circuit board assembly, the housing comprising:

• (a) a left side wall having a base, a front wall, and a top wall;
• (b) a removable right side wall hinged to said base of said left side wall, said right side wall having spaced slots and said left side wall having projections received into said slots so that said right side wall can be positioned over said left side wall;
• (c) fastener means for releasably retaining said right side wall on said left side wall;
• (d) said power supply circuit board assembly secured to said left side wall and having a plurality of components thereon, said components functioning as input or output devices and are externally exposed through said housing, said left side wall including locator means alignably positioning said circuit board within said housing;
• (e) an adapter plate disposed on said front wall, said front wall having opening receiving said components with means for maintaining alignment between said openings and said components, and said adapter plate having a plurality of windows and additional openings exposing a plurality of said components;
• and
• (f) a battery cover disposed on said adapter plate.