how to obtain -12/+12 from two smps ?

Thread Starter

egemen

Joined May 10, 2011
3
hello,

I have two +12 V smps which are identical.They have com,ground,+v terminals.
how can I get -12v/+12 using these smps.Sorry for this stupid question but my I can not come up with a solution.

Best regards
 

Wendy

Joined Mar 24, 2008
23,415
On one SMPS have ground connected to +, it will be a negative power supply. On the other SMPS have ground connected to -, it will be the positive power supply. Use the grounds on the SMPS terminals.

Then connect the grounds together.

I am assuming com is the - terminal, and it is not already connected to ground. Please post the datasheets for the power supplies.
 

Thread Starter

egemen

Joined May 10, 2011
3
I dont have datasheets but you are right comm are - terminals.ı will try your solution and reply back.thank you..
 

Wendy

Joined Mar 24, 2008
23,415
Most good power supplies are floating. Ones like the old HP brands had a jumper that could connect their ground to either the plus or minus jacks. The really good ones have voltage sense lines that let you regulate the voltage at the point of use.
 
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