Re: [PSES] Gigabit Ethernet Magnetics configuartion question

2014-11-12 Thread Brian Oconnell
If rated for 1 or 2kV, this could be the ESD discharge cap that is typically between 'ground' and power that is located directly on the RJ45 port. If the cap is used with ferrite beads, then probably for noise decoupling. Later designs tend to not use caps on secondary side of xfmr because the c

Re: [PSES] Open Protective Earth Conductor Fault

2014-11-12 Thread Ronald R. Wellman
I appreciate the responses to this but I want to emphasize that the "standards" give you an out to open earth leakage current testing if the mains connection means meets certain requirements. This has nothing to do with internal product construction of the protective bonding circuit. Th

[PSES] LVD when AC/DC adapter connected?

2014-11-12 Thread Amund Westin
A non-radio product is supplied with 12VDC from an external battery. LVD does not apply. As an option, an AC/DC adapter (230VAC to 12VDC) can be use as power source. In such a configuration (adapter + product), I understand from the LVD Guidance (August 2007) that LVD will apply, when accompanying