RE: UL approval IT equipment

You *could be* right. I've been in this situation several times. Let me explain. My golden rule is - the burden of power supply approvals should be on the mfr. I don't negotiate on this point ever. Two things could happen if you don't follow this rule: 1. You can certainly go for just

Re: UL approval IT equipment

Thanks for all response. What I have learned from this session is, always use a UL recognized power supply (PS) if you want to get your end product UL listed. Do not interfere with non-recognized PS, that might cause you trouble later, especially during the UL audits and it will also require

Re: UL approval IT equipment

I read in !emc-pstc that am...@westin.org wrote (in 20010907130815.1903 0.qm...@www2.nameplanet.com) about 'UL approval IT equipment', on Fri, 7 Sep 2001: We want our IT product to be UL approved. We purchase a modified power supply (PS) which is not UL appoved. The original PS is UL approved.

RE: UL approval IT equipment

Amund, I have to agree with John. If you have a good relationship (and let's not forget YOU are a customer!) with the power supply vendor, you could agree to pay the UL certification fee and have them submit the unit back to UL as an alternate to the original investigation. Based on the proposed

Re: UL approval IT equipment

Hi Amund: We want our IT product to be UL approved. We purchase a modified power supply (PS) which is not UL appoved. The original PS is UL approved. The only difference in the PS is the value of one resistor which means that we now can take 2.3A/28VDC out instead of

Re: UL approval IT equipment

I have also been down this road. We insist he supply manufacturer add the new version to their `recognized' file. If it doesn't affect the critical components transformer etc. it should be a minor update to their file. This way you have a recognized component that is traceable. If it isn't

RE: UL approval IT equipment

I've been down this road . . . The power supply will have to go through the approval process too, including multiple samples of the magnetics, providing drawings, etc . . . You will also have to a) have the manufacturer put a 'freeze' on the design of the unit (it's now a 'custom unit' for you)