DC WIRE COLORS BLUE BROWN
IEC DC power circuit wiring color codesFunction label Color Negative (of a positive earthed) circuit L- grey Positive L+brown Mid-wire M blue Negative L- grey 6 more rows
Wiring Color Codes | Color Codes | Electronics Textbook
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Back to the Basics – How do I wire my 3-wire sensors
A 3-wire sensor typically is color coded with one brown wire, one blue wire and one black wire. The brown wire is the +VDC wire that connects to the positive (+) side of the power supply and the blue wire is connected to the common terminal of the power supply; this is the negative (-) terminal that is present on the power supply.
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