S-500-48 48V/10A SMPS
48 V 10 A switch-mode power supply, 500 W, 220 V AC input, for a stepper-drive DC bus.
Overview
The S-500-48 is a switch-mode power supply taking 220 V AC and delivering 48 V DC at up to 10 A, 500 W - the highest-power 48 V supply in this range, double the S-250-48's wattage at the same voltage.
48 V reaches further into most stepper drive input ranges than 24 V does, keeping torque up further into the speed range, since a stepper's usable torque falls away as step rate rises and winding inductance limits how fast current can be re-established. 10 A at this voltage gives real headroom for two or three mid-sized drives running together, but a stepper drive's current draw spikes during acceleration - size the supply to the combined peak, not the combined running current, or the rail will sag exactly when the axes start together.
It also holds less bulk capacitance than a linear supply built around a transformer - more of a concern here than on a single-drive supply, since several axes decelerating together compounds the regenerative current it has to absorb. Where that matters, the TLP-04/TLP-05 rectifier-and-filter cards build a linear supply instead.
For the same power at lower voltage and higher current, the S-500-24 delivers 24 V at 20 A from the same 500 W.
Supplied by Tiny Controls in India.
Specifications
| Output voltage | 48 V DC |
|---|---|
| Output current | 10 A |
| Output power | 500 W |
| Type | Switch-mode |
Questions
Why would I choose 48V over 24V for my stepper drives?
48V reaches further into most stepper drive input ranges than 24V does, keeping usable torque up further into the speed range — a stepper's torque falls away as step rate rises, and winding inductance limits how fast current can be re-established, so the higher rail helps there.
I'm running two or three drives together — do I just add up their running currents to size this?
No — size it to the combined peak current during acceleration, not the combined running current. A stepper drive's current draw spikes when it accelerates, and if you size for running current only, the rail sags exactly when the axes start together.
Will this hold up if several axes decelerate at the same time and dump regenerative current back?
Worth checking — it holds less bulk capacitance than a linear supply built around a transformer, and several axes decelerating together compounds the regenerative current it has to absorb. Where that's a real concern, the TLP-04/TLP-05 rectifier-and-filter cards build a linear supply instead.
Is this the most powerful 48V supply you sell?
Yes — the highest-power 48V supply in this range, double the S-250-48's wattage at the same voltage.