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Technical information -
Standards and certification marks

UL certification

Given that Auer Signal has a global market presence, the majority of the company's signalling equipment is also certified in line with UL standards. Plus, as a member of the 'Client Test Data Program', Auer Signal is also authorised to conduct UL-related tests in its own laboratory. UL accepts the results of such tests on a provisional basis, but then periodically repeats the tests to check the quality of the results.

UL is the locally established certification for devices specifically on the US market. Although UL certification is not a fixed requirement in particular outside of America, a user of a device with UL certification can be sure that it meets incredibly stringent safety standards because UL has a stronger focus on safety-related aspects than European standards.

As part of UL certification, devices have to be tested by qualified testers and inspectors are sent out to device manufacturers four times a year under the scope of follow-up services to ensure that the prescribed manufacturing methods and material specifications are being upheld.

If the UL mark is preceded by the letter C, it indicates that the device has also been tested in line with the standards set out by the CSA (Canadian Standards Association) and has also been certified for use in Canada.

The list below provides an explanation of the device classifications according to UL:

Type 1

Indoor use primarily to provide protection against contact with the enclosed equipment and against a limited amount of falling dust/dirt

Type 2

Indoor use to provide a degree of protection against a limited amount of water and dust

Type 3

Outdoor use to provide a degree of protection against windblown dust and rain; the device is undamaged by the formation of ice on the enclosure

Type 3R

Outdoor use to provide a degree of protection against rain; the device is undamaged by the formation of ice on the enclosure


Type 4

Either indoor or outdoor use to provide a degree of protection against rain, splashing water and hose-directed water; the device is undamaged by the formation of ice on the enclosure


Type 4X

Either indoor or outdoor use to provide a degree of protection against rain, splashing water and hose-directed water; the device is undamaged by the formation of ice on the enclosure; resists corrosion

Type 6

Indoor or outdoor use to provide a degree of protection against entry of water during temporary submersion/flooding at a limited depth; the device is undamaged by  the external formation of ice on the enclosure

Type 12

Indoor use to provide a degree of protection against dust, dirt, fibre flyings, dripping water and external condensation of non-corrosive liquids

Type 13

Indoor use to provide a degree of protection against lint, dust seepage, external condensation and spraying of water, oil and non-corrosive liquids

CE marking

The CE marking is the manufacturer's declaration - in the form of a conformity declaration - that the product meets all of the applicable European directives and the safety requirements contained within them.

ATEX

The ATEX logo indicates that a product is permitted for use in potentially explosive atmospheres in accordance with the European ATEX Directive. The product itself has a test number and detailed information about the certification on its label.

AS Interface

The AS-INTERFACE logo shows that a product can be integrated into an AS-Interface fieldbus system.