Patent ID: 8379398

Claim:
A base for a process fieldbus, the base comprising a pair of elongate side-by-side plastic shells joined together to form a body having an elongate interior space with opposed sides, a pair of opposed, parallel upper circuit board grooves extending along said interior sides, a pair of opposed, parallel lower circuit board grooves extending along said interior sides below the upper circuit board grooves; a unitary circuit board assembly comprising an upper circuit board, a lower circuit board under the upper circuit board, and a spacer joined to said upper and lower circuit boards to maintain said circuit boards in a spaced, parallel and fixed relation to each other, each circuit board having opposed and parallel edges; the edges of the upper circuit board in the upper circuit board grooves, the edges of the lower circuit board in the lower circuit board grooves; a first alignment member at one of said circuit board edges, a second alignment member at one of said grooves, said first and second alignment members engaging each other; first contact elements on the circuit board assembly for establishing electrical connections with a process fieldbus; and second contact elements on the circuit board assembly for establishing electrical connections with a DC power source for the fieldbus; wherein said grooves align the circuit board assembly vertically in the body and said alignment members align the circuit board assembly horizontally in the body.