Just put one of these switches on a DIN rail, and I noticed something
curious. All the photos I've seen show the switch with the DC power
terminals at the top. This makes some sense when you see that the vents
in the side of the case are them at the top, which makes a natural path
for hot air to escape.
However, it does not make sense when you also notice that this puts the
fan at the bottom. Well, not at first, until you also notice that the
fan (at the bottom) is an exhaust fan, and not an intake fan. So the
vents at the top, let hot air out, but the fan at the bottom is pulling
air in from the top? Huh? Shouldn't I be putting the DC power terminals
at the bottom, so that the exhaust fan can actually exhaust up?
The other issue is that the DIN rail clips are spring loaded, and just
the cable weight seems to pull on the sprung clips, and I would think
that you'd want the fixed clips on top (the ones that don't retract),
and that to dismount, you would lift the unit, and rotate downward.
Am I miss reading this?
--
bp
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