Siemens 3RK1901-1DG12-1AA0 AS-i Data Decoupler 1 x 4 A Spring-type Terminals. Siemens 3RK1901-1DG12-1AA0 Power Supply - AS-i data decoupler 1 x 4 A Spring-type terminals, AS-i single Data decoupling module IP20, SlimLine S22.5 spring-type terminals Overall width module 22.5 mm IN: 24 V / 30 V DC OUT: 1 x AS-i, 4 A Integrated overload protection Integrated ground fault detection Signaling contact Remote reset. Output voltage: 30 V DC, Rated current: 4 A.