Edwards FX-NAC Analog NAC ModuleThe Edwards GE FX NAC Analog NAC Module connects a supervised output circuit to a signal riser. The output wiring is monitored for open and short circuits. A short circuit causes the module to inhibit the activation of the audible visual signal circuit so the riser is not connected to the wiring fault. The module can be used for connection of a Class A or Class B (with EOL) output notification appliance circuit (NAC).