Re: [PSES] CISPR 25 Limits for conducted disturbances - guidance for selecting emissions class

[James Pawson (U3C)]

Thanks for the reply Matthew, it ties in very much with some responses I got on 
LinkedIn to this query

 

https://www.linkedin.com/feed/update/urn:li:activity:6631477154083409920/

 

Primarily that:

*   vehicle manufacturers have specific requirements for anything that gets 
put into their products.
*   No specific guidance for aftermarket components
*   Need to synthesize these requirements from OEM specifications.

 

All the best

James

 

 

 

James Pawson

EMC Problem Solver

 

Unit 3 Compliance

Design for EMC / Pre Compliance / Problem Solving / EMC Testing / Consultancy / 
Environmental & Vibration

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Opening Hours: Tuesday to Friday, 0830 to 1800. Closed Monday.

 

From: Matthew Wilson | GBE  
Sent: 07 February 2020 21:24
To: James Pawson (U3C) ; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] CISPR 25 Limits for conducted disturbances - guidance for 
selecting emissions class

 

Maybe some document like this from Ford would help?

 

https://www.elect-spec.com/download/EMC_CS_2009rev1.pdf

 

Similar from Jaguar Land Rover?

 

http://emc.jaguarlandrover.com.edgesuite.net/docs/download/JLR-EMC-CS_v1.0_Amendment_4.pdf

 

Have a look for “Automotive OEM Specifications” on your chosen search engine.

 

HTH.

 

Matthew Wilson,

GB Electronics (UK) Ltd.

 









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From: James Pawson (U3C) mailto:ja...@unit3compliance.co.uk> > 
Sent: 05 February 2020 12:09
To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> 
Subject: [PSES] CISPR 25 Limits for conducted disturbances - guidance for 
selecting emissions class

 

Hello experts,

 

Can anyone point me towards any guidance for selecting the appropriate CISPR 25 
emissions Class (1-5) based on installation of equipment within a vehicle? The 
standard states “The level class to be used (as a function of the frequency 
band) shall be agreed upon between the vehicle manufacturer and the component 
supplier.”

 

I’m assuming that factors like proximity to radio antenna and length of cables 
will make a difference but can find no guidance after entering a variety of 
search terms.

 

This query is related to aftermarket automotive accessories covered under EN 
50498 which doesn’t specify limits for conducted emissions. 

 

I would be interested to hear your thoughts.

 

Thanks and all the best

James

 

James Pawson

EMC Problem Solver

 

Unit 3 Compliance

Design for EMC / Pre Compliance / Problem Solving / EMC Testing / Consultancy / 
Environmental & Vibration

www.unit3compliance.co.uk 
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Re: [PSES] CISPR 25 Limits for conducted disturbances - guidance for selecting emissions class

[Matthew Wilson | GBE]

Maybe some document like this from Ford would help?

https://www.elect-spec.com/download/EMC_CS_2009rev1.pdf

Similar from Jaguar Land Rover?

http://emc.jaguarlandrover.com.edgesuite.net/docs/download/JLR-EMC-CS_v1.0_Amendment_4.pdf

Have a look for "Automotive OEM Specifications" on your chosen search engine.

HTH.

Matthew Wilson,
GB Electronics (UK) Ltd.


Matthew Wilson
Technical Director
GB Electronics (UK) Ltd
matthew.wil...@gbelectronics.com
https://gbelectronics.uk
+44 (0)1903 244 500
Ascot House//Mulberry Close//Woods Way
Goring-by-Sea//West Sussex//BN12 4QY//UK

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number 06210991.
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Sussex, BN12 4QY.
From: James Pawson (U3C) 
Sent: 05 February 2020 12:09
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] CISPR 25 Limits for conducted disturbances - guidance for 
selecting emissions class

Hello experts,

Can anyone point me towards any guidance for selecting the appropriate CISPR 25 
emissions Class (1-5) based on installation of equipment within a vehicle? The 
standard states "The level class to be used (as a function of the frequency 
band) shall be agreed upon between the vehicle manufacturer and the component 
supplier."

I'm assuming that factors like proximity to radio antenna and length of cables 
will make a difference but can find no guidance after entering a variety of 
search terms.

This query is related to aftermarket automotive accessories covered under EN 
50498 which doesn't specify limits for conducted emissions.

I would be interested to hear your thoughts.

Thanks and all the best
James

James Pawson
EMC Problem Solver

Unit 3 Compliance
Design for EMC / Pre Compliance / Problem Solving / EMC Testing / Consultancy / 
Environmental & Vibration
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[PSES] CISPR 25 Limits for conducted disturbances - guidance for selecting emissions class

[James Pawson (U3C)]

Hello experts,

 

Can anyone point me towards any guidance for selecting the appropriate CISPR
25 emissions Class (1-5) based on installation of equipment within a
vehicle? The standard states "The level class to be used (as a function of
the frequency band) shall be agreed upon between the vehicle manufacturer
and the component supplier."

 

I'm assuming that factors like proximity to radio antenna and length of
cables will make a difference but can find no guidance after entering a
variety of search terms.

 

This query is related to aftermarket automotive accessories covered under EN
50498 which doesn't specify limits for conducted emissions. 

 

I would be interested to hear your thoughts.

 

Thanks and all the best

James

 

James Pawson

EMC Problem Solver

 

Unit 3 Compliance

Design for EMC / Pre Compliance / Problem Solving / EMC Testing /
Consultancy / Environmental & Vibration

  www.unit3compliance.co.uk -- 07811
139957

Opening Hours: Tuesday to Friday, 0830 to 1800. Closed Monday.

 


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CISPR 25 limits

[emc-p...@ieee.org]

 

Dear group,

I've been tasked with trying to find out why the radiated limits for
higher frequencies were relaxed in edition 2 of CISPR 25. Can anyone
shed some light on this?

Thanks,

Bill

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