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For the purposes of determining accessible parts, what is the difference between plugs/jacks/connectors (i.e., sub clause V.1.4, requiring the use of a blunt probe) and a terminal (i.e., sub clause V.1.6, requiring the use of a terminal probe)?

When determining the application of a requirement in any of the IEC 62368-1 Annexes, it'™s always important to remember to locate in the base standard content (clauses 1-10) where the Annex is referenced since Annexes are not intended to stand alone without a reference from the base content of the standard.


As a result of doing this:


-Subclauses (Accessibility to electrical energy sources and safeguards '“ Requirements) and (Safeguards against transient voltages from external circuits '“ Requirements) directly reference the blunt probe (Figure V.3).


-Subclause (Terminals for connecting stripped wire) directly references the terminal probe (Figure V.5).


In summary:


-The blunt probe (Figure V.3) is utilized to identify (or 'œdetermine' or 'œassess') the accessibility of connector pins at ES2 under normal operating conditions, and the pins of the connector shall not be accessible by this probe.


-The terminal probe (Figure V.5) is utilized to identify (or 'œdetermine' or 'œassess') the accessibility of  internal parts classified as ES2 or ES3 through any openings within 25 mm of terminals for connecting stripped wire.

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