12Volt DC input, Positive to RED, and Negative to BLACK, Right!?5Volt Volt DC output, Positive to RED, and Negative to YELLOW, Right!?
485376
That's correct. I am using four of these to power four Raspberry PIs. Yellow/Red are the 5V out side and Black/Red are the input side.
576105
the common is for your input voltage you want to use for the output(no/nc). Your neutral or negative would go to the device you are controlling. The output(no/nc) would then go to the hot or positive of the device you are controlling.
2087133
This is a dual wire, so if you want the black to be ground and the red to be power, simply wire it that way, or vice versa.
812493
On the side of the unit, it says "7-9 Volt", and a diagram for NEGATIVE CENTER. This is important because most wall adapters are positive-center, and using the wrong one might burn out the machine (unless the circuit designers went the extra mile to protect against that, which I'm not going to try to find out).
2082571
In automotive electric red is always positive and black is always negative. Take it from an electrical engineer.
2132410
i believe the two black are the heater 12v no polarity. the other two are signal to the computer and polarity is necessary. good luck. peter
1727654
Hi My name is John. Are you running all your all black wires to ground. Red is positive or (HOT) wire & black being ground? Follow signal switch wiring color for color. Make sure you ground all connections.
875127
Take a digital Volt meter and it will tell you if it is positive of negative.Don
719772
This is wired to your 12 VDC system directly. Ends of the wire are bare. Red goes to positive, black to negative (or ground in a car). This is NOT the type you plug into your cigarette lighter. As stated in the description, it is panel mounted.
704610
Output: DC 5.2V - 2.5A INPUT: 100-240V - 50/60Hz Port size: 5.5 x 2.5mm (outer is negative, inner is positive)
2064414
All previous answers are correct for TxD, RxD and ground. TxD and RxD operate at 3.3 volts. Paul Hardin is correct that red is 5 volts. It's a direct passthrough of the 5.0 volts @ 500 ma from the USB connector.
2217468
There are two wires (red and black). Red is positive, center, and black is negative, outside.
1606263
It all depends on the device in which you're going to use it. That is the diagram you'll need. Otherwise it is red (positive) and black (negative). Usually the device has the connection wires marked red and black and therefor red to red and black to black.
416144
red to positive and black to negative. if there is any power in the battery the tester comes on. scroll through the options as described in the manual. 12 volt only.
791931
Mine is marked 1-9 left to right looking at the power strip connections 1,2,3=V+ 4,5,6=V- 7=Frame, safety ground - bare or green or green-yellow 8=Neutral, White 9=Active, Black (or sometimes Red), this is the switched line if you have a single pole on/off switch (it's shown as "L" or Live in the decal) Supply output (24v) is floating so you can ground (if required) either the V+ or V-
2205355
Yes - the output voltage is 12 VAC (not 12 VDC as a previous answer stated). But one of the other commenters was correct about the min load. When you just hook up the transformer and test the output without a load, it will read zero, or close to it. I thought the product was broken at first, but one I connected the load, all was well. It's been functioning great since (about 5 months ago).
1189587
white is all ground, ground from load to ground from line (12v). Black is positive from line (12v). Red is positive to load.