Tech document needed - Using DIN rail mounted devices properly
Tech document needed - Using DIN rail mounted devices properly
(OP)
I'm groggy from Googling things like DIN rail mounting guidelines. And have not found much at all, even from manufacturers who offer components with DIN mounting features.
First it looks to me like the rails need to run horizontal, partly because most all the pictures show that, and second because I can picture a vertical rail full of typical spring clamped components sliding off the end, like a Shish Kabob. Third, there are some shock requirements for this system, and the DIN system looks to have a timid grip on the rail.
We are about to use the DIN system in an enclosure that only fits in an orientation that will result in vertical rails.
First it looks to me like the rails need to run horizontal, partly because most all the pictures show that, and second because I can picture a vertical rail full of typical spring clamped components sliding off the end, like a Shish Kabob. Third, there are some shock requirements for this system, and the DIN system looks to have a timid grip on the rail.
We are about to use the DIN system in an enclosure that only fits in an orientation that will result in vertical rails.





RE: Tech document needed - Using DIN rail mounted devices properly
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Tech document needed - Using DIN rail mounted devices properly
You can mount them any dang way yo want. Most parts won't easily slide off. BUT! Everyone who actually wants to worry about that can just use "END STOPS". They are just little clip on devices that are meant purrley to keep anything from moving down DIN rails. I use them all the time. They are even used as punctuation sometimes. To help make it clear something new is starting on the DIN rail, like between inputs and outputs or higher voltages and low voltages.
Example:http://www.mcmaster.com/nav/enter.asp?pagenum=716
Note: The End Stops.
BTW: Mcmaster.com is a great place to pick up DIN rail terminal blocks without a bunch of hassle.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Tech document needed - Using DIN rail mounted devices properly
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Tech document needed - Using DIN rail mounted devices properly
RE: Tech document needed - Using DIN rail mounted devices properly
But in general, the those specs include vibration limitations for devices with centers of mass at specific distances from the rail etc. It would then be up to the device mfgr. to apply that to their individual device. In the same vein, DIN rail standards don't delineate whether or not it is appropriate to mount a device vertically or not, that is up to the device in question. Most devices will have detailed mounting position and vibration specifications in their instruction manuals, another IEC / EN standard requirement. Manufacturers of devices with no such detailed instructions are probably using DIN rail mounting out of convenience but don't actually subscribe to or have been tested to those standards so should probably be avoided. In other words, if you have something that doesn't specifically says it is OK to mount on a vertically oriented DIN rail, you shouldn't do it. If it does, it will also tell you every detail about what you can and cannot do.
RE: Tech document needed - Using DIN rail mounted devices properly
Since there are devices with limitations, and you usually do not have all the specifications, and some (like the SITOP and other power supplies) can only tolerate a horisontal rail, it is a big no-no to put device holding DIN rails vertically.
You never know the mix, really. At least in shops where I have (had) any influence. Putting up rails both horisontally and vertically and then trying to figure out what device can be put where is just plain silly.
Vertical? For terminal blocks - yes. No probs. That's how they usually are used.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Tech document needed - Using DIN rail mounted devices properly
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Tech document needed - Using DIN rail mounted devices properly
Incidentally, we just released a new power supply that now does away with DIN rail mounting - full circle in the design process eh? The reason was vibration. In transportation applications and other high vibration and shock load situations, the (horizontally mounted) DIN rail acts as a spring with heavy devices to amplify the vibration. So they went back to a metal back plate and 4 screws.
RE: Tech document needed - Using DIN rail mounted devices properly
I am surprised that the rail can add spring too, since most rail can be screwed down about every 2 inches. I can see some yokel screwing it down at just the ends, and then hanging pounds on the middle, bongybongybongy.
Granted, eliminating any way to din mount a product, will avoid the wrong end stops and poorly installed rail.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Tech document needed - Using DIN rail mounted devices properly
ht
part number - 013 1401885
not picking on these guys, but the M6 holes are on a shelf at each end, so DIN rails attached with those M6 holes will have a ~15 inch free span suspended at the ends
RE: Tech document needed - Using DIN rail mounted devices properly
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Sometimes I wake up Grumpy.
Other times I just let her sleep!
RE: Tech document needed - Using DIN rail mounted devices properly