Features  External (key-switch operated): Reset/resound/test zone lamps evacuate Silence alarm sounders Silence fault sounders Internal: One man detector test Zone isolate Revert to short-circuit: fire (no resistors in call points) External indicators: Sounder fault Battery/power supply fault Mains on Zone fire Zone fault Internal indicators: Open circuit zone fault Short circuit zone fault Zone isolated Engineer test selected Outputs: Two sounder circuits (alarm relay contacts can be obtained by connecting a relay to a sounder circuit) Ancillary connections for expansion modules will allow the following: Repeater panels Multiple sounder outputs Connection to landlord panel