Collected from various spots around the Web, including evanescent eBay listings, and reformatted to make sense, these specs describe the 2M415 stepper driver: a smaller sibling of the 2M542 family.
- +15 to 40VDC Supply Voltage
- H-Bridge, 2 Phase Bi-polar Micro-stepping Drive
- Suitable for 2-phase, 4, 6 and 8 leads step motors, with Nema size 16 to 23
- Output current selectable from 0.21 ~ 1.5A peak
- Compact credit card size package
- Optically isolated single ended TTL inputs for Pulse, Direction and Enable signal inputs
- Selectable resolutions up to 12800 steps
- Over Voltage, Coil to Coil and Coil to Ground short circuit protection.
|Output Current (Peak)||0.21||-||1.5||Amp|
|Logic Input Current||7||10||16||mA|
|Pulse input frequency||0||-||200||KHz|
|Low Level Time||2.5||µsec|
|Cooling||Natural Cooling or Forced Convection|
|Space||Avoid dust, oil, frost and corrosive gases|
|Ambient Temp||0 °C – 50 °C|
|Humidity||40 – 80 %RH|
|Vibration||5.9 m/s² Max|
|Storage Temp.||-10 °C – 80 °C|
|Weight||Approx. 150 gram|
Notice that the driver requires a positive voltage for the optoisolators.
Of course, the box from halfway around the planet contained HB-415M drivers. Should you go looking with the usual keywords, you’ll find that HB-number turns up mostly “House Bill number” citations from various state legislatures. Popping the top off the drive reveals www.sikesai.com, which eventually produces a description and PDF datasheet for the driver. It turns out to be an “Ultra Low Noise” driver, whatever that means, with reasonably standard specifications that correspond more-or-less to the 2M415 drivers I thought I was getting.