Patent ID: 8587949

Claim:
A digital electrical power and energy meter comprising: a housing; a plurality of interface cards residing within the housing, each interface card comprising a printed circuit board and an electrical mating connector, each electrical mating connector configured to be connected to a surface-mounted connector; a first one of the plurality of interface cards comprises: at least one voltage sensor for sensing a voltage signal; at least one current sensor for sensing a current signal; and at least one analog to digital converter coupled to said at least one voltage sensor and said at least one current sensor; and a motherboard residing within the housing, the motherboard comprising: a first surface and a second surface, the first surface opposing the second surface; a plurality of surface-mounted connectors disposed on the first surface, each surface-mounted connector receiving the electrical mating connector of a respective one of the interface cards; and a user interface module disposed on the second surface, the user interface module configured for displaying information to a user and receiving commands from a user.