Piotr,
Cl. 3.5 (interconnection) should give you some guidance.
John Radomski
Principal Engineer
Schneider Automation Inc.
"Piotr Galka"
<piotr.galka@micr To: "EMC-PSTC"
<[email protected]>
omade.pl> cc:
Sent by: Subject: EN 60950-1 and 3.5mm
terminal blocks
[email protected]
08/31/2006 07:44
AM
All,
Can I use 3.5mm terminal blocks in device under EN 60950-1 ?
Device is powered by 12V DC LPS source.
For connecting external signals (5V OC 2mA) cables with 0.5mm diameter wires
(0.2mm2) are used.
Each conductor is single wire so I understand these are not flexible cords.
3.5mm terminal blocks accept 0.14mm2 to 0.75mm2, but EN 60950-1 3.3.4 needs
for other cables
(as not flexible cords than other) terminals accepting up to 2.5mm2.
It looks that it is for all connections because:
3 Wiring, connections and supply
3.3 Wiring terminals for connection of external conductors
3.3.4 Conductor sizes to be connected.
I also worry if standard 3.5mm terminal blocks agree with EN 60950-1 3.3.6:
"Terminals shall be
so designed or located that the conductor cannot slip out when the clamping
screws or nuts are
tightened."
Do 5V 2mA signal lines really need so much care or I missed something.
Thanks in advance.
Piotr Gałka
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