Wiring 2 power supplies together?

[Fastest1]

I have (2) Lambda 24vdc @ 4.5A power supplies. They were originally wired to provide 48vdc @ 4.5A (not sure about the amperage). I think I am supposed to wire the outputs in series to obtain 48vdc @ 4.5A. However before I just start joining them together to find out what FIRE looks like. I though I might ask. Do I need to use a diode in the linking? I did have them hooked in parallel and tried to bridge the + to the - on 1 side thinking that was creating series (I actually think I briefly connected series/parallel, the power lights went out but the magic smoke stayed inside, I depowered the moment I saw the leds go out). After writing this, I think I see where I went wrong. In series shouldnt all connections be between opposite poles? ie always + to -?

[Al_The_Man]

First check the voltage on each independently to make sure you did not blow anything and if you have 24v on each, use the +24 on the first one for the 48v output, connect the - of the first to the + of the second one, the common will be the -ve of the second one.
If using a grounded common, you can only have the -ve of the second at ground.
The current capacity will be 4.5amps.
Al.

[Fastest1]

Thanks Al and the name fits you. I did test both (they were fine) after my momentary flash of ignorance that was realized as I typed out the question. I am a little confused on your references to v- and the ground. I will seek more clarity as I progress though. It looks like I dont need a diode. I think the only reason I thought a diode was necessary was because I was trying series & parallel combined (not on purpose) and subconciously saw it was wrong. Anyway thanks for the fast response.

[Fastest1]

Again AL, Thank You! And to all others who help when it is needed.
All is well now and voltage increases speed and torque. I am not sure why something as simple as connecting 2 power supplies in series was baffling me, but no more. It works great as do all 3 axis on my lathe with tool changer.