Russell: I recall that, about two decades ago, the MoD had a rationale for applying civilian EMC standards to military systems. They claimed that many military electronics would ultimately find their way onto the civilian surplus market (an act that they felt was akin to new production). I’m not arguing either side of that concept, just giving you the original smell of the logic.
Ed Price WB6WSN Chula Vista, CA USA From: Russell Beattie [mailto:00000a0e51f5c059-dmarc-requ...@ieee.org] Sent: Tuesday, August 03, 2021 6:15 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Applicability of Conducted Immunity testing of Standalone Systems interconnection cabling Military products are outside the scope of the emc directive in the uk and always has been. The UK approval process has not changed since Brexit. However a lot of contracts placed by the MOD include the requirements of civil standards as a general statement. In this case it is not appropriate as the military vehicle has a specific standard in Def Std 59-411. This should have been sorted out when the contract submission was first reviewed by the MOD. The requirements of the EMC directive are in no way applicable to the military vehicle. If a comparison of results obtained during the Def Stan tests are compared with the civil requirements (really suspect and difficult assessment as test methods are very different and in most cases incompatible), the case needs to be justified in a technical file to meet the requirements of the EMC Directive. My advice would be to seriously question the need for, or point of, the civil tests. Sent from Yahoo Mail on Android<https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature> On Tue, Aug 3, 2021 at 8:20 PM, Ken Javor <ken.ja...@emccompliance.com> wrote: It’s clear that EMC is part of applying for the CE mark, but I guess the real question I was asking – apparently none too skillfully – is why would a CE mark be required for a piece of equipment slated for use on a military vehicle, and Brit as well? Ken Javor Phone: (256) 650-5261 ________________________________ From: Philip Stevenson <pw...@hotmail.co.uk> Reply-To: Philip Stevenson <pw...@hotmail.co.uk> Date: Tue, 3 Aug 2021 22:40:02 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] Applicability of Conducted Immunity testing of Standalone Systems interconnection cabling Dear Ken For CE Marking the product has to be assessed against all applicable directives. In the case of this product it is only the EMC Directive that is applicable. For compliance with the EMC Directive an EMC assessment needs to be carried out and documented, normally against one or more of the EU EMC harmonised standards. As there is no product specific EMC harmonised standard for this type of system the Generic EMC Standards was used. The EMC Assessment is based on the Def Stan 59-411 EMC Test Results and using Gap Analysis to compare these to the Generic EMC Standards requirements. In some cases additional testing against the EMC harmonised standards may also be required. I believe that this standard practice for the CE Marking of Military equipment in the UK. I hope this answers your question. Regards Philip Stevenson Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 From: Ken Javor <mailto:ken.ja...@emccompliance.com> Sent: 03 August 2021 17:43 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Applicability of Conducted Immunity testing of Standalone Systems interconnection cabling Just out of curiosity, recognizing this isn’t going to help, but since it has no mains connection and is powered by vehicle dc primary power, why isn’t DEF STAN 59-411 the sole EMI standard involved? Ken Javor Phone: (256) 650-5261 From: Philip Stevenson <pw...@hotmail.co.uk> Reply-To: Philip Stevenson <pw...@hotmail.co.uk> Date: Tue, 3 Aug 2021 15:20:57 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] Applicability of Conducted Immunity testing of Standalone Systems interconnection cabling Dear Listing Members Dear CE Marking Association We are currently carrying out an EMC Directive assessment of one of our Vehicle Mounted Military Systems against the Generic EMC Standards for Industrial Environments. It is a dc powered standalone Military System with no external Signal Port Input or Output connections. It does have one external DC Input Port whose sole purpose is for charging the system batteries when the system is not in service. The length of the system battery charging cable is < 3m. In normal operation this external DC Input Port is not used. The Vehicle Mounted Military System consists of a number of sub-systems connected via fully screened interconnection cabling some of which are longer than 3 metres but all are much less than 30 metres long. The interconnection cabling is in some cases a combination of both signal and dc power connections but there are also some solely signal cables and dc power cables as well. My question relates to whether the EN 61000-6-2 Signal and DC Power Ports Radio-Frequency Common Mode test requirements are applicable to the sub-system interconnection cabling whose length is greater than 3m or not? Noting as previously stated the system has no external cable connections in normal operation. I am aware that DC Power connections do not have any cable length exemptions but in a standalone system this would not be considered to be a “DC Distribution Network”. Your advice on this matter would be greatly appreciated. Regards Philip Stevenson Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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