In message <0F877EFE518E4F1FBC7A7B42A7777829@MmPc21>, dated Mon, 21 Sep 2009, Piotr Galka <[email protected]> writes:
>John, > >----- Original Message ----- From: "John Woodgate" ><[email protected]> >> >> They are usually quite well shielded for electric fields, and the EMC >>standards are rather 'soft' on magnetic fields because they rarely >>cause problems. > >It happened that each time the solenoid was de-energised, our >controller was reset and than energised it again - there were no way to >open the door. The reason was no diode installed at solenoid. This is not a lack of 'EMC benignity' of the solenoid as a component. The Directive applies to the product that includes the solenoid. That has to meet electric field emission limits, which should protect your controller, IF its immunity is sufficient. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
