The ATENA addressable panel is supplied as standard with a loop and can be expanded with a maximum of 3 additional loops by means of expansion card 41ECL020 with one loop. Up to 250 addressed devices (detectors, buttons, I/O modules, sirens etc.), divided into a maximum of 96 zones in total, can be connected to each loop. The control panel comes in a strong grey metal container and displays all indications and commands on the front in compliance with the requirements set out by standard EN54-2, by means of LED light signals and the 320x240 pixel LCD Touch-screen display. The control panel features a dual microprocessor (redundant CPU). Fire alarm, Pre-alarm, Fault, CPU Fault, Delayed Alarm, Exclusions, Test, Network Present general indications. Option of integration in monitoring systems with Modbus TCP/IP protocol. Approved to EN 54-2 and EN 54-4.