Abstract: By providing a retaining surface, upon which a solid state device is positioned, and a device securing means movable into and out of compression engagement with a portion of the solid state device, for securely mounting and retaining the device in sandwiched interengagement between the securing means and the retaining surface, a unique solid state device mounting assembly is achieved which eliminates fastening means extending through the solid state device for secure mounting thereof. In addition, the assembly incorporates heat dissipating means cooperatingly associated with the retaining surface for absorbing and dissipating heat generated by the solid state device. In the preferred embodiment, an elongated unitary one-piece bracket member is employed for securely mounting a plurality of solid state devices in the single bracket member, with the bracket member being mountable to a heat dissipating surface.

Abstract: By providing an input/output housing which incorporates paired slider assemblies for supportingly maintaining a printed circuit board in secure electronic engagement between a central processor and external devices, with said printed circuit board being quickly and easily removable from the electronically engaged position, an input/output system for a programmable controller is achieved which is capable of being quickly and easily expanded as well as capable of rapid field assembly and field disassembly for removal or replacement of any required parts. In addition, the external equipment wiring is made to a terminal block which is mounted between the paired slider assemblies and pivotally engaged therein to provide readily accessible contact points for initial interconnection thereto, while also being pivotally movable and slidingly advanceable into the housing for continuous maintenance therein in a secure, hidden, easily accessible storage zone.