Power Supplies

[m_c]

I'd use different power supplies.

You really need the 5 and 24volts active all of the time. You could include them in the E-stop controlled circuit, but if they're only used for control purposes, there's not really any benefit in doing so, provided the E-stop cuts power to anything that provides movement.

For the drives, go for a torroid (50VAC theoretically gives 70VDC, but is nearer 80 when you allow for effeiciency/mains voltage fluctuation), suitable bridge rectifier and big capacitor, to create an unregulated supply.

For the 24V, you could use a DIN rail mounted switched mode supply, or go for a small transformer with a 24V linear regulator, but you'll have to use a variable output regulator as 24V is not a common standard output.
For 5V, you could use another switched mode supply, or if required current is low, then just run a 5V linear regulator from the 24V.
You may be able to find a suitable switched mode supply that does both voltages, but I wouldn't know where to look.


If you want a torroid and required parts, I have a 750VA 50V surplus to requirements. This one to be exact - Standard Range Toroidal Transformers: CM0750250: 750VA 230v to 2x50v, along with a 25A bridge rectifier and 100Vdc 22000uF capacitor. Only use has been linking it all together on the bench to test.
I also have an old school 24VDC supply that came from my new milling machine, which I'd throw in for cost of postage, as I've no idea if it works! The links are set for 100V input, but can be resoldered to 240V.