The ANN-LED annunciator module provides LED annunciation of general system faults and input zones/points when used with a compatible Fire Alarm Control Panel (FACP). The ANN-LED module provides alarm (red), trouble (yellow) and supervisory (yellow) indication for up to ten input zones or addressable points. ANNRLED has red LEDs only for alarm communication of up to 30 addressable points. The ANN-LED is supplied standard with certain Canadian FACPs as required by ULC. The ANN-LED and the FACP communicate over a two-wire serial interface employing the ANN-Bus communication format. An additional two wires are used for 24-volt DC power. A single four-conductor unshielded cable may be used for both power and data communications. Up to eight ANN-Bus devices may be connected to the ANN-Bus of each FACP.