Hi Scott:
Certification is not a function of the safety standard; it is a function of the
certification house. Most certification houses would be happy to certify a
low-voltage product.
Keep in mind that the various safety standards also address matters other than
electric shock. 62368-1 has separate clauses that address heat, fire,
stability, etc., so these other matters are clearly visible. If your EPS is
rated for 4 amps at 12 volts, you have 48 watts available under normal
conditions and probably 100 watts under fault conditions. Under 62368-1, the
ITE would (should!) be evaluated for both fire and hot accessible parts.
Required by 62368-1? No. But, a good idea; it’s easy, relatively fast,
relatively cheap, and keeps the questions from being asked.
Stay safe!
Rich
From: Scott Douglas <sdouglas...@gmail.com>
Sent: Tuesday, September 29, 2020 1:52 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Low Voltage Products and EN 62368-1 and -3
Esteemed colleagues,
Question on EN 62368-1 and -3 related to low voltage products.
Products are ITE equipment with power requirement of 5v or 12v DC and less than
4 amps, sometimes they are powered by PoE. We ship some of these products with
an external power supply 120/230 V~ input and 5 or 12 VDC output. The EPS
always have full certifications to normal safety standards including 62368-1.
Other times we do not include an EPS with the product.
One of our factories is trying to tell us that under IEC/EN 62368-1 or -3, our
products are required to have safety certifications, that having just the EPS
certified to 62368-1 is not enough.
We have always said that since these are low voltage products (even the PoE
ones) that safety certifications are not required for the products themselves.
Has something changed where these type products are now required to have safety
approvals for the EU or US/Canada markets? Or since they are not directly
connected to the AC Mains, they do not need safety approvals?
Looking for someone to either confirm my sanity or teach me a new lesson. All
comments welcome.
Scott
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