Housings for Frame Installation are fitted in suitable mounting frames and can be swiveled to the front for installation and service. The mounting frames are screwed to the wall surface and accommodate the precabling. As an alternative to the surface-mounted version, installation in 482.6 mm (19") racks with special installation kits is also possible. 12 V/45 Ah batteries can be used in the frame installation housing. The modular system makes it easy to extend the facility.