Redundant systems, methods, and apparatus for use in arc flash prevention systems

A hub (106) for use with a circuit protection system includes a first input port (218) configured to communicatively couple to at least one sensor device (102), wherein the at least one sensor device includes a light source (206) and at least one light sensor (204). The hub also includes a first output port (226) configured to communicatively couple to at least one controller (124), and a processor (236) communicatively coupled to the first input port and to the first output port. The processor is configured to receive a sensor status signal from the at least one light sensor (204) via the first input port in response to a test pulse emitted by the light source, and transmit a hub status signal to the at least one controller (124) via the first output port based at least in part on the sensor status signal.