Is this center ground negative or positive?
2028164
The BOSS PSA-120S adapter has a center Negative (-) and the external barrel Positive (+).
1606262
The terminal on the front right face of the battery is positive. It is marked with a red dot. It can be seen if you magnify the screen shot. The negative is on the back right side.
911281
12 volts, 2 amps, center positive. Here is a pic of it to make sure. https://www.dropbox.com/sc/6ggji2971ucfld2/AADIDwIe1vfJ3bHmZmNNcL_la
1130167
See Karlberg's comment. Also, both studs are for Positive inputs. There are no Negative (ground) terminals.
444263
Red is positive, the center pin. Black is negative and that's the outside ring.
362119
I don't have a schematic but the negative terminals measure zero ohms between them. The positive terminals show a high resistance. So I would say it is common negative. The two mounting pads appear to be isolated from the rest of the circuit.
51566
My installation is grounded to the negative side of the battery, I recall the manufactures installation instructions showed a negative and a positive ground diagram so you should be able to do either.
887676
the left hand terminal is negative. and the photo is correct showing red at the right terminal...red is positive.
569337
It's never a good idea to try to trust wire insulation color as a determination of polarity unless you have a datasheet that clearly states the color and polarity. I always test power supply outputs with a meter before connecting them.
1379032
Amazon carries for under sdollars make sure that you get the correct polarity--- Positive center negative outside!!!!
940857
2 posts in middle are for positive/negative DC Input. The two outside posts are for positive/negative DC output to motor. Switch just reverses polarity on those 2 posts.
2217468
There are two wires (red and black). Red is positive, center, and black is negative, outside.
332882
The diagram on the Power Supply shows that the center is (+), outside is (-).
1953353
Sorry, Allthumbs16; I gave this as a gift and didn't try it out. However, I was told by the person I gave it to that you hook it up between positive and negative.
579827
Hi Patricia, This is a 12 volt negative ground. Yes indeed. Never be afraid to call Pertronix direct, they have a great crew there.
659248
Yes. It's center negative just like the pedal. This was one of the quietest adapters I've used.
535897
The center post is NEGATIVE, the outer shell is POSITIVE. This is opposite of what many common connectors for power supplies have. You need to look on the Casio specifications for the AD-5. Also, there is a small diagram on the plastic case of my CT-700, where the AD-5 plugs into the keyboard, that shows this polarity requirement. Jay Daugherty is incorrect.