dmx decoder

Hi all, I have a DMX decoder for RGB LED tape and I want to wire it up for use on a show. Its clear how the tape gets wired in but I have got a bit confused on how the power supply hooks up. There is an in for the power input clearly marked but then there is also another 'V- V-' terminal that...

Hi! This is my first post on this forum. I'm wondering if someone can help me out with figuring out how to control some led string lights with a dmx decoder and power supply. There are four groups of them, so I hoped that I could control them with a four channel decoder and connect all of the...