One FireRaptor OBFRS-01 unit is installed on each module, and is powered by a two conductor cable system with its own connectors. The communications cabling is hard wired, there is no wireless or power line communications in this system that can fail due to interference from the charge control, inverter, or externally. The operation is simple, if power is supplied to the units at ~24 VDC they will turn on, if that power is interrupted, they will turn off. The OBFRS-01 will also turn off if it senses an ambient temperature over 185°F (85°C) and turn back on when the temperature drops. If it senses a temperature over 198°F (92°C) it will shutdown and require a manual reset.
This system is compatible with any charge controls or inverters. Each OBFRS-01 unit comes with two MC4 module connectors on 5 inch pigtails, two string series pigtails each at 71 inches with MC4 connectors, and two control wire pigtails each at 71 inches with special connectors. The control wire is jacketed dual conductor, and the connectors work for both connectors.