2-wire connection technology (neutral conductor not required).
Neutral conductor can be connected optionally (recommended when connecting low loads, < 10 W/VA).
For switching lighting systems.
Operation in two-way circuits possible via button extension.
Operation also possible via conventional buttons (2020 US, 2021/6 UK).
Without control element.
For control element flex, 1-way, 64711 and Wireless, 62711-WL.
For control element flex, 2-way, 64721 and Wireless, 62721-WL.
For Busch-Komfortschalter® flex control element 64765-... .
For Busch-Wächter® 180 flex sensors 6476x-... .
For Busch-Wächter® 180 flex sensors, Wireless, 6276x-.-WL.
For Busch presence detector flex sensors 6475x-...
Can be combined with extension insert flex, 64891 U.
Only use dimmable high-voltage LEDs.
The relay insert 64811 U is to be used to control energy-saving lamps, conventional and electronic ballasts.
The relay insert 64811 U is to be used to control relays and staircase timers.
The insert can be used via a wireless sensor in Busch-flexTronics® wireless or Busch-free@home® wireless.
Only install in conjunction with commercially available flush-mounted device boxes in accordance with DIN 49073 Part 1.