Embarrassing question about MTH terminal block 20-1020

I’ll be home in 30 minutes to check.  It might be the inside higher vertical terminals are positive and lower, outer vertical ones are negative. If you look at the board (can remember of on back, front, or both sides, you can see the circuit band from the red and black main hook ups and which terminals they feed. 

I used the smaller version with only two rows of screws. I matched up my red and black wires to matching numbers and they work fine.

It is a little confusing.   On first look one could assume that the 2 lefthand rows of screws are connected to Positive and the 2 righthand rows of screws are connected to Negative.  THIS IS WRONG.

All of the "A" screws are connected to Positive, and all of the "B" screws are connected to Negative. 

Power supply goes to the red + and the black - terminals.

One lead of bulbs goes to A1, A2, A3, etc "+"  screws AND other lead of bulbs goes to B1, B2, B3, etc "-"  screws .  If using LEDs, observe correct polarity.

Bob

Thanks, fellas. As soon as get home I will re-wire. I love wiring, by the way. It’s like an enema with a taser.

Scrappy

Scrapiron Scher posted:

Thanks, fellas. As soon as get home I will re-wire. I love wiring, by the way. It’s like an enema with a taser.

Scrappy

Ouch!!!   

That is confusing! It shows you need to read the labeling carefully. I built my own and each side lines up with the red or black terminal. It doesn't even matter which screw I tie to, since the whole side is connected to black and the whole other side is connected to red. Absolutely no chance that a wire may touch an adjacent terminal post and short. To me, it's odd that MTH built it the way they did. Can anyone explain the reasoning?

George

Scrapiron Scher posted:

I love wiring, by the way. It’s like an enema with a taser.

Scrappy

...Two Thumbs-Up on this one, Scrappy!  Except my analogy would be 'like a digital prostate exam with a bottle brush'!

Been chasing an elusive wiring problem on my Ross #280 Double X-over with DZ-1008 (4) relays for several days.  Wife has put earmuffs on Millie & Daisy (Goldens) when I'm in the basement to inhibit the blue language from sullying their minds.  (Wife's used to it by now.)

Exotic craft brews, more expensive wine....tried them all.  Hasn't helped. 

Oh, well.....the Eagles won, stock market is tanking, and here down the road in Michigan...

....so we might as well try again tonight. 

KD

dkdkrd posted:

Scrapiron Scher posted:

I love wiring, by the way. It’s like an enema with a taser.

Scrappy

...Two Thumbs-Up on this one, Scrappy!  Except my analogy would be 'like a digital prostate exam with a bottle brush'!

Been chasing an elusive wiring problem on my Ross #280 Double X-over with DZ-1008 (4) relays for several days.  Wife has put earmuffs on Millie & Daisy (Goldens) when I'm in the basement to inhibit the blue language from sullying their minds.  (Wife's used to it by now.)

Exotic craft brews, more expensive wine....tried them all.  Hasn't helped. 

Oh, well.....the Eagles won, stock market is tanking, and here down the road in Michigan...

....so we might as well try again tonight. 

KD

I was in Hell (Michigan) a few years ago.   Got the T-Shirt to prove it.

Chief Bob (Retired)

Elliot.........you aren't the only one!  I was confused until I turned mine over and noticed the solder path. BTW, I don't think much of really being misleading......someone should have thought this out just a bit better. We all aren't wiring things everyday.

Many thanks to all of you. Scrapiron actually understands this now. You've done a good job educating me. I cannot say I understand the plan the way MTH did it, but I know what to do. Please hold off on the taser.

Power restored. Many thanks. No taser needed. For now.

I have a 12 connector board. I did DCS on 3 loops with 4 connectors on each loop home runs. Took a Dremel tool and cut the traces to make 3 circuits. Works perfect and fairly neat in appearance.

Scrapiron Scher posted:

Many thanks to all of you. Scrapiron actually understands this now. You've done a good job educating me. I cannot say I understand the plan the way MTH did it, but I know what to do. Please hold off on the taser.

IIRC these are Minitaronics boards.