Power line communication smart relay

A replacement smart relay comprising:

• a. a smart relay, controlled by a microcontroller operably connected through a power line communication line that receives instructions from a relay controller;
• b. the instructions from the relay controller are capable of allowing the relay switched terminals to be controlled open or closed based on the request on the relay control terminals, to allow the smart relay to function the same as the relay it is replacing in the existing application;
• c. the instructions from the relay controller are capable of allowing the relay switched terminals to be controlled open or closed independently of the request on the relay control terminals to override a command from the existing application, based on a set of conditions determined by the relay controller;
• and
• d. the instructions from the relay controller allow the relay switched terminals to be controlled open or closed to a different state after loss of active communication between the smart relay and relay controller.

A replacement smart relay comprising:

• a. a relay, controlled by a microcontroller operably connected through a power line communication line that receives instructions from a relay controller;
• b. the instructions from the relay controller are capable of allowing the relay switched terminals to be controlled open or closed independently of the request on the relay control terminals to override a command from the existing application, based on a set of conditions determined by the relay controller;
• c. the instructions from the relay controller allow the relay switched terminals to be controlled open or closed to a different state after loss of active communication between the smart relay and relay controller;
• and
• d. when the smart relay power is cycled, the instructions from the relay controller allow the relay switched terminals to be controlled open or closed in the same state as they were prior to the power cycle.