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a couple questions about ground wiring on the ipac4

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struby:
so you guys are saying make two loops one with each terminal, like lets say i have terminals a and b for ground, and buttons 1 and two, are you saying this:

take ground wire from terminal a to button 1 to button 2 then back to terminal a, and do the same for terminal b, or are you saying go from terminal a to button 1 to button 2 and then to terminal b and do that twice?

The other option being:

that or just go from terminal a to button 1 and stop, and from terminal b to button 2 and stop

Jeff AMN:
It seems that they've gone like this:

Ground terminal A --> Button 1 --> Button 2 --> Ground Terminal A

Come out of one terminal, daisy chain it, and return to the same terminal. At least, I'm pretty sure that's what they're doing. I actually have an endpoint in my ground line, but I might bring it back home as it would be nice to have that self-correcting failsafe.

EDIT:

Mine currently goes like this:

Ground Terminal --> Button 1 --> Button 2 --> Button 3 --> [....] --> Button 16 (end point)

struby:
and then repeat with terminal b so you have a loop going with both, i have like a 48 inch wide cp so i dunno if i even have the wire to do that, so i might just loop one per side or not loop it,

 but basically, make a ground terminal make it's way to every button somehow and you are good right?

Spaz Monkey:


Here's a pic from the Ultimarc website.  Notice the ground wire hitting each switch?  If you wanted to, you could run a wire from the last button to the P2 ground.  You don't have to if you don't want to, but if the wire comes loose between buttons 2 & 3 and you only have one connection, some of your buttons won't work.

um3k:

--- Quote from: struby on March 28, 2007, 05:52:58 pm ---and then repeat with terminal b so you have a loop going with both, i have like a 48 inch wide cp so i dunno if i even have the wire to do that
--- End quote ---
No, you only have to make one loop from Terminal A --> Button 1 --> Button 2 --> ... --> Terminal A (or B).   You get the extra redundancy because when there is a break in the wire, everything before the break can flow through the "left side" of the loop and everything after the break can still flow though the "right side" of the loop.   Or to put it another way, if there is a break, it has basically just created two independant single-path grounds (with endpoints).

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