ABB VItal 1 Manual page 8

Operating mode M1 - Separate function Vital 2
Input function 1 controls output group 1, and
input function 2 controls output group 2.
Operating mode M2 - Input 1, master function Vital 2
Input function 1 stops all outputs, and input
function 2 stops output group 2.
Operating mode M3 - Parallel function Vital 2
Input function 1 and input function 2 operate
in parallel and control all outputs. Reset/Auto
reset 1 resets both input functions (Reset/
Auto Reset 2 is not used).
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