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LCU9016III is a central unit for the ARX system that can be connected directly to existing TCP / IP network. The central unit can handle up to 16 door environments with up to 32 card readers, and also 16 up to 32 SIO units, depending on number of doors being used LCU9016III uses dynamic IP address; it communicates with the protocol SSL / TLS and switches automatically to the customer s unique encryption keys associated with the installation. LCU9016III has an enclosure that can be easily fitted with ARX alarm components, such as master and slave cards, which creates conditions for building an alarm system in the ARX. LCU9016III with attached master card 9016III MIO, can directly manage six alarm zones and control sounders. When 9016III MIO is supplemented with alarm interface (LIF01) can alarms be sent to alarm transmitters. To increase the number of alarm zones and alarm areas more alarm units and add-on cards can be connected to the alarm system on the unique AES 128-bit encrypted bus (ASSA-SIO bus). LCU can handle over 100,000 cards and practically unlimited number of schedules, calendars, day types etc. More than 30,000 log events can be saved locally before they need to be transferred to the ARX server. LCU9016III also has a separate event log file for alarm related events. The LCU works autonomously, that is, it works even if the network is down or the server is not running. The software is stored in flash memory and can be updated from the server ARX.