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Power Question -- Adding +5v

2006-01-09 by Tkacs, Ken

Would someone on the list be so kind as to check my thinking? The only
thing about my modular that's a real gray area for me is the power
supply portion. I'm no engineer, and the fact that the voltages involved
are dangerous, coupled with the fact that I could burn out my modules,
means that I cringe in terror whenever I need to work on the power
supply.

 

But with the MOTM-650 around the corner, I guess it's time to start
thinking about adding that +5v rail to the cabinets.

 

I have the new MOTM power distribution board on order, the one with the
new 6-pin connectors (http://www.synthtech.com/images/m990large.jpg).
And I have some +5v PowerOne supplies on hand. I'm thinking that I would
wire one in the following way... someone please yell if I'm about to do
something rampantly idiotic.

 

- The AC power comes into the cabinet.

 

- Split it so that it goes to both "center pins" of a front panel DPDT
switch.

 

- From there, both the +/-15v and 5v supplies are wired up
independently, but the two chassis frames are bolted together (someone a
while ago indicated that multiple power supplies in a system should have
their frames electrically connected).

 

- Run lines (12 gauge wire) to the power distribution board from each
supply to the appropriate screw terminals on the distro board.

 

Thanks in advance for any life- and system-saving advice!

 

Ken Tkacs

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