Fireclass Essential Conventional 2 Zone Fire Alarm Panel - 508.032.730Fireclass Essential 2 Zone Panel The Fireclass Essential Panel range is an EN approved, low cost conventional panels that are available in both 2 Zone and 4 Zone variants. The panels can support up to 128 devices with a maximum of 32 devices on each zone. The panels are approved to EN 54 2, EN 54 4, and listed as part of the EN 54 13 system certificate. The panel UI has the following features: 18 LEDs on the 2 Zone Panel and 22 LEDs on the 4 Zone