ABB DI581-S

Marsoni

M251S

$596.17

Get it in 3 business days with 1 day shipping. Friday, May 29

ABB DI581-SDIGITAL INPUT MODULE. SAFETY 16SDI, 16SDI SIL2 8SDI SIL3, 24VDC, 1 WIRE, 8 PULSE OUTPUT (DI581 S)

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I’ve only had this about a week but I like it so far. It has a hook that grabs the vent blade and is very sturdy. It also has a part that slides up and down. I realized after a few days that can be tightened as well. Makes the phone even more still. There is a small button on the right that releases the arms that grab the phone. I didn’t see that noted on the instructions so mentioning it here so no one pulls on them like I did a few times. As long as this doesn’t damage my vent, I will be pleased.

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Reviewed in the United States on April 21, 2026