IP69K Pushbuttons

[mcs666]

I'm currently redesigning an operator panel for a pharmaceutical machine that has had a long history of problems with the push buttons, pilot lights and selector switches. Looking for some real world recommendations for a bullet proof replacement.
I've used Tele ZB4 switches in the past, with great results, but not in this environment. Not sure if I should stick with Tele, but add a silicone/neoprene boot or go with a different manufacturer. The Schmersal IP69K looks interesting, but if anyone has some input from actual use of them, or another manufacturer, I'd appreciate any comments.

 

[jraef]

Years ago when I built control panels, I had a client that made spice mixing and blending equipment. Anyone who has had involvement with the spice industry will likely attest to the fact that many spices are extremely corrosive, especially to things like electrical equipment. If that dust penetrates anywhere, it's all over quickly.

We had a LOT of trouble with push buttons being the favorite port of entry, probably because they were being flexed and abused a lot every day. We tried almost everything we could find, it all failed in varying lengths of time, until we tried EPR (Ethylene Propylene Rubber) caps available at the time only from Allen Bradley. They were perfect, zero failures. We were using 30mm devices, sounds like you might be using 22mm, but it would be worth checking into whether those caps are available in 22mm, I know they still are in 30mm.

Full disclosure, I now work for Rockwell, who is now A-B, but for a different division. I no longer have a direct connection to push buttons, I just remembered that experience from my past life.

"Will work for (the memory of) salami"

 

[itsmoked]

I would recommend you look into vandal proof switches. They need to completely transcend the mere wear and liquids issues to deliver vandal proofness. Some have no moving parts. Makes them kind of hard to "wear out"

Keith Cress
kcress -

http://www.flaminsystems.com