Power supply unit with toroidal transformer, overload and short-circuit protection for the 2-wire system (SB2) to supply the external call station (L1-L1) and the riser (L2-L2). Equipped with a terminal for the line termination Art. 1216. Input voltage 110-240V AC. Compatible with loudspeaker module Art. 4681, Art. 1621 VC, Art. 1621, Art. UT2010, Art. UT2010VC and Art. UT2020. Dimensions: 8 DIN modules.
