Robert,

Both these standards cover Explosion Protection Techniques - Intrinsic Safety. 
They have absolutely nothing to do with UL 1950. The UL 
standard for "intrinsic safety" is UL 913 but it is not equivalent to nor 
harmonized with these other two standards. I doubt that any 
industrial PC is or can be made "intrinsically safe." The normal protection 
methods for industrial PC's are "flameproofing" or "air 
purging." This is a specialty and there are companies that make special 
enclosures for PC's that must be located in "flammable atmospheres". 
One that comes to mind is Daisy Systems. 

- Mike Rains



From:   Robert Terry[SMTP:[email protected]]
Sent:   Monday, September 30, 1996 3:15PM
To:     [email protected]
Subject:        Australian Standard


I received a recent request from a potential customer for an industrial PC
that meets the following 2 specifications.

Australian Standard 2380.7-1987 and IEC 79-11.

I am not familiar with these standards and would appreciate any information
on these standards.  Ideally, I would like to know what these standards
cover, as well as how close the US counterparts come to meeting them.

For example, if these are product safety standards for ITE, how close does
UL1950 come!!

Thanks in advance for any information that you guys have on these standards!





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