Abstract: An enclosure housing has a first wall defined as a molded polymeric construction, a first latch defined as a one-piece construction with the first wall, a second wall defined as a molded polymeric construction, and a second latch defined as a one-piece construction with the second wall. A circuit board is connected to the enclosure housing and includes a board member defined by a periphery. The periphery includes: (i) a first tab defined by a first inclined ramp surface and a first locking face that lies transverse to the first inclined ramp surface, wherein the first tab is engaged with the first latch; and, (ii) a second tab defined by a second inclined ramp surface and a second locking face that lies transverse to the second inclined ramp surface, wherein the second tab is engaged with the second latch.

Abstract: A module is adapted to be releasably mounted to a mounting rail such as a DIN rail. The module includes a rail receiving location and first and second latches each movable between a first position where they are retracted from the rail receiving location and a second position where they at least partially obstruct the rail receiving location. The module is selectively attachable to an associated rail located in the rail receiving location by movement of the first and second latches to their respective second positions. One or both of the first and second latches is conformed to capture a projecting portion of an adjacent module when in the second position so as to affix the module and the adjacent module to each other and to the mounting rail.