Harry K wrote:
....

Hmmm...I wonder if one can get a second set. ...

They're readily available as spare parts; I have no idea what the cost is.

Since afaik no opener has separate inputs for two sets they wouldn't
work wired in parallel for anything that didn't simultaneously break
both beams of course, so would have to be in series[1].

That would then raise the question of whether the drive voltage/current
from the power supply has the ability to power both at once. But, other
than that, ottomh don't see any fundamental reason couldn't work.


--