Model: MD9SUV (self-power supply)

>    Function: Under/Over voltage monitoring

>    Rated voltage: 50-300V AC/DC or 15-150V AC/DC or 150-600V AC

>    Relay output: 2 c/o

>    Switching capacity: 8A, 250V AC

Panel caption:

PW: power supply indication, AL: alarm indication, R: relay status indication, Function mode: (ON DELAY: fault recovery delay, OFF DELAY: fault trigger delay), <U: under-voltage threshold setting (50-300V AC/DC), >U: over-voltage threshold setting (50-300V AC/DC), Tt: delay setting (0.1-30s)

Relevant model: MD6SUV: (rated voltage: 150-600V AC)