Ken

EMC Directive Compliance of UK MOD for Military equipment is a requirement of 
Def Stan 59-411 Part 1 Appendix F. So this is why the system has to be CE 
marked and is normally a contractual requirement of the UK MOD procurement 
process.

I hope this explains why we are CE marking the system. The process is mostly 
administrative (creating CE Marking Technical File and EU Declaration of 
Conformity) based of the more severe Military EMC Test Requirements.

Regards

Philip Stevenson


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From: Ken Javor<mailto:[email protected]>
Sent: 04 August 2021 01:15
To: [email protected]<mailto:[email protected]>
Subject: Re: [PSES] Applicability of Conducted Immunity testing of Standalone 
Systems interconnection cabling

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 <[email protected]>
Reply-To: Philip Stevenson <[email protected]>
Date: Tue, 3 Aug 2021 22:40:02 +0000
To: <[email protected]>
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

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From: Ken Javor <mailto:[email protected]>
Sent: 03 August 2021 17:43
To: [email protected]
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 <[email protected]>
Reply-To: Philip Stevenson <[email protected]>
Date: Tue, 3 Aug 2021 15:20:57 +0000
To: <[email protected]>
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



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