Acti 9 communication system, connectable devices without Ti24 interface. Auxiliary module iATL24 for remote switch iTL with Ti24 interface, 24V DC. Type iATL24. Energy meters with pulse output, e.g. iEM3110. Measuring devices in accordance with the IEC 62053-21 standard. 24 V DC indicator lights, Harmony XVL range. All consumers not exceeding 100 mA, 24 V DC. IC2000 twilight switch. Timers, thermostats, time switches, load shedding contactors. All 24 V DC auxiliary contacts, IEC 61131-2 Type 1.