Acti 9 communication system, connectable devices without Ti24 interface. Auxiliary module iACT24 for remote switch iCT with Ti24 interface, 24V DC. Type iACT24. Energy meter with pulse output, e.g. iEM3110. Measuring devices according to the IEC 62053-21 standard. 24 V DC indicator lights, Harmony XVL range. All consumers not exceeding 100 mA, 24 V DC. Twilight switch IC2000. Timers, thermostats, time switches, load shedding contactors. All 24 V DC auxiliary contacts, IEC 61131-2 Type 1.