Patent ID: 7880734
Filing Date: 2011-02-01
Classification: G05B,Y02P

Abstract:
1. A control system comprising: (a) a submodule including: and wherein said anode of said first light source is connected to said cathode of said second light source at a first junction, and wherein said cathode of said first light source is connected to said anode of said second light source at a second junction, and wherein a first said current limiter is connected serially between said first input terminal and said first junction and wherein a second said current limiter is connected serially between said second input terminal and said second junction, said submodule being operative to detect a voltage difference between said first input terminal and said second input terminal regardless of polarity; and (b) an interface, and wherein said submodule is operative to be connected to an external device via said interface, and wherein said interface is operative to be connected, at any particular time, to a said submodule chosen from a plurality of said submodules.