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03-09-2013 #1
While designing my control cabinet I want lights to indicate that the various voltage supplies are present to aid safety and trouble shooting.
The voltages are 230v AC, 70v DC & 24v DC. I understand I can use a neon indicator for the 230v AC and an LED for the 24v DC, but what about the 70v DC, do I consider a filament lamp?
The on-line calculators state that the use of a load resistor on an LED will dissipate excessive heat.
I’m not up to speed on this subject so I would appreciate any assistance.
It would also be good if the indicators could have a similar appearance.
Jim
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