S-250-24 24V/10A SMPS
24 V 10 A switch-mode power supply, 250 W, 220 V AC input, for a stepper-drive DC bus.
Overview
The S-250-24 is a switch-mode power supply taking 220 V AC and delivering 24 V DC at up to 10 A, 250 W - a step up from the S-072-24's 72 W control supply, sized to run a stepper drive rather than just a panel's controllers and I/O.
24 V sits at the low end of most stepper drive input ranges (the Tstep-484 runs 18-48 V, for instance), so it suits smaller NEMA 17/23 motors rather than the higher-voltage end of a drive's range where torque at speed improves. 10 A covers the running current of one or two such drives, but a stepper drive's current draw spikes during acceleration - size the supply to the peak, not the average, or the rail will sag exactly when an axis starts.
It also holds less bulk capacitance than a linear supply built around a transformer, which matters for absorbing a drive's regenerative current on deceleration; where that's a concern, the TLP-04/TLP-05 rectifier-and-filter cards build a linear supply instead.
For a higher-voltage motor bus in the same power class, the S-250-48 delivers 48 V at 5 A from the same 250 W.
Supplied by Tiny Controls in India.
Specifications
| Output voltage | 24 V DC |
|---|---|
| Output current | 10 A |
| Output power | 250 W |
| Type | Switch-mode |
Questions
How's this different from your smaller S-072-24?
It's a step up from a 72W control-only supply to a 250W supply sized to actually run a stepper drive, not just a panel's controllers and I/O.
Will 24V leave torque on the table at higher speeds?
It can — 24V sits at the low end of most stepper drive input ranges (the Tstep-484, for instance, runs 18-48V), so this suits smaller NEMA 17/23 motors rather than the higher-voltage end of a drive's range where torque at speed improves.
Is 10A enough for one drive, or several?
It covers the running current of one or two such drives — but size to each axis's peak current during acceleration, not the average, or the rail will sag when an axis starts.
What about regenerative current on deceleration?
Worth checking — it holds less bulk capacitance than a linear supply. The TLP-04/TLP-05 rectifier-and-filter cards build a linear supply instead where that's a concern.