R420 – AO820 Analog Output 4 ch Description Description R420 – AO820 Analog Output 4 ch +-20mA, 0(4)…20mA, +-10V, 12bit+sign. Individually galvanic isolated channels. RL max 500 Ohms. Use Module Termination Unit TU810, TU812, TU814, TU830, TU833. Related products ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE066485R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE076939R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSC630197R1 Read more