Redundant module expansion card for Atena and Atena Easy control panels. This can be used to create a redundant serial communication network between multiple ATENA, ATENA EASY control panels and repeater panels (up to a maximum of 64), thereby ensuring a backup line of connection in the event of a fault in the physical communication link. Maximum current consumption: 500 mA. Network type: redundant serial line. Maximum number of panels in network: 64. Maximum distance between two cards: 1000 m. Recommended connection cable: twisted pair 0.5 - 2.5 mm2.