This unit is housed within a secure, lockable enclosure made of powder-coated sheet metal. It is equipped with a mains to 24 V DC power supply along with a backup battery charger. The front panel prominently displays control buttons and indicator LEDs. Comprehensive monitoring is in place for all zone and sounder circuits to detect open and short circuit fault conditions. Lightning suppression devices are incorporated for enhanced protection. In addition to the two standard sounder outputs, the unit features a fire brigade contact (voltage reversal), a change-over alarm contact per zone, a common fault change-over contact, a common fire change-over contact, and a gas area output designed for connection to the TEC047 Extinguishant Release Control Panel.