Wanted: MOTRONIC DIGITAL DC MOTION CONTROLLER / SOFT STARTER

[Manutr83]

Hi,

I am looking for Motronic DC Motion Controller/Soft Starter, Model SS-1.
Can anybody advice where I can find this

 

[hevans1944]

It appears, as we say here in the States, that you are SOL on your quest. I asked Grok 4.5 for help and copied its reply below. I also uploaded the two images you provided in the original post (always a good idea to do that!) and Grok appeared to find them useful. Note that Grok did offer some suggestions that may help.

[Begin Grok 4.5 Response:]

Thanks for the photos — they confirm the exact product.

It is a Motronic SS-1 (also marked PUP-20 on the specs side), described as a “Digital DC Motion Controller/Soft Starter” / “DC Soft Starter” / “Variable Speed Controller.”

Key details from the labels​

• Manufacturer: Motronic (Australia) — website was http://www.motronic.com.au (now defunct / only a contact form).
• Support email (from the unit): [email protected]
• Ratings:
  • Input voltage: 19.5 V – 32 V
  • Input/Output current: 60 A peak / 30 A continuous
  • PWM frequency: 17–21 kHz
• Terminals for Battery and Motor (heavy studs), START switch, STATUS LED, and a multi-pin connector for external control (potentiometer, limit switches, etc.).

Availability​

I could find no current manufacturer, distributor, datasheet library, or active surplus listings for this exact SS-1 / PUP-20 unit. Motronic Australia appears to have ceased operations or stopped supporting this product line years ago. The domain no longer hosts product information.

This was almost certainly a small-volume Australian-made controller aimed at low-voltage battery-powered DC motors (mobility equipment, solar pumps, small industrial or marine applications, etc.).

Practical options for the forum poster​

1. Contact attempt
   Try the old support email ([email protected]) or the contact form on the residual website — low probability of success, but worth one try.
2. Surplus / used market
   Search eBay, Gumtree (Australia), industrial surplus yards, or Australian electronics recyclers using the exact terms “Motronic SS-1”, “Motronic PUP-20”, or “Motronic DC Soft Starter”.
3. Modern replacements
   Closest functional substitutes are modern low-voltage PWM DC motor controllers / soft-start drives in the 24–36 V, 30–60 A class. Examples commonly available in Australia and internationally:
   • Generic or branded 12–48 V / 40–60 A PWM controllers with soft-start (many sold by Motion Dynamics Australia and similar suppliers).
   • Industrial DC drives from Sprint Electric, Parker, or ABB in the appropriate voltage/current range (usually overkill and more expensive, but fully supported).

If the original poster can provide the application (motor voltage/current, whether reversible, pot control needed, etc.), a more precise modern equivalent can be suggested.

Bottom line: The Motronic SS-1 is obsolete and no longer commercially available through normal channels. Replacement with a current low-voltage DC PWM soft-start controller is the realistic path.

[End Grok 4.5 response]