Product Overview
ISEL Stepper Motor Driver Card with Onboard 110V Transformer and Front Panel Status LEDs
Condition
Used, clean, and in excellent condition. Working at time of removal. We have not run it under power since, so the photographs and that removal note are what we stand behind. The anodized aluminum front panel carries the ISEL logo, a green power LED, yellow Error, Temp. and Home indicators, a screwdriver-adjust control marked I Phase, and a DE-9 female connector marked Stepping-Motor Output. There is no model number printed anywhere on the unit, which matches how this piece has always been listed. The open-frame card presents clean throughout in the photographs - front panel, black finned heatsink, board, toroidal transformer and rear backplane pins all look undisturbed. An orange warning label on the transformer reads 110 V/60 Hz, the transformer's own label notes a thermal cutout and fuse values of 2.5AT and 1AT, and the main filter capacitor is date coded 01/97.
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Product Overview
The ISEL UMS 2, also written USM2, is a bipolar stepper motor power stage built as a plug-in rack card rather than a bare driver board. Everything travels together: the toroidal mains transformer, the filter capacitor, the drive electronics and the heatsink all live on one 3U style card, so the module runs from 110 V AC without a separate bench supply. Motor phases leave through the front panel DE-9 marked Stepping-Motor Output, control and power connections land on the multi-pin backplane connector at the rear, and phase current is set with the front panel adjustment marked I Phase. Front panel LEDs report power, Error, Temp. and Home at a glance. Exact current settings, step modes and switching specifications are not confirmed here - verify against ISEL documentation before you commission it.
Key Features
- Format: open-frame 3U style plug-in card with aluminum front panel and ribbed grip
- Front panel connector: DE-9 female, marked Stepping-Motor Output
- Front panel indicators: green power LED plus yellow Error, Temp. and Home LEDs
- Front panel adjustment: screwdriver trimmer marked I Phase
- Rear connection: multi-pin backplane connector block for control and mains wiring
- Power input: onboard toroidal transformer, orange label marked 110 V/60 Hz
- Protection noted on the transformer label: thermal cutout, fuse values 2.5AT and 1AT
- Cooling: passive, black finned heatsink along one side, no fan fitted
- Date evidence: main filter capacitor date coded 01/97
- Markings: ISEL logo on the front panel; no model number printed on the unit
Applications
- Maintenance technician keeping an older ISEL motion rack in service and needing a spare power stage on the shelf
- Machine shop owner restoring a legacy ISEL driven router or milling table rather than replacing the whole control
- Automation engineer building a bench test rig for a two-phase stepper without wiring up a separate transformer and supply
- Lab or university technician recommissioning older German motion equipment where the original card is missing
Frequently Asked Questions
Do I need an external power supply for this module?
No separate DC supply is called for. The transformer, rectifier and filter capacitor are on the card, and the transformer label reads 110 V/60 Hz. Confirm the mains and backplane wiring against ISEL documentation for your rack before you apply power.
How does the motor connect?
Through the DE-9 female connector on the front panel, marked Stepping-Motor Output. Control signals and power come in on the multi-pin connector at the rear of the card. No mating cables or connectors are included.
What current can I set, and does it do half stepping?
Not confirmed. There is a front panel trimmer marked I Phase, so phase current is adjustable, but no current range, step mode or switching frequency is printed on this unit and we have not measured it. Check ISEL documentation for the UMS 2 series and verify the settings on your own motor before running a machine with it.
Is there a model number on the card itself?
No. The front panel carries the ISEL logo and the function labels only. The internal transformer has its own maker's label with an article number and fuse data, but that belongs to the transformer, not to the module.
It is used and untested here - what am I actually buying, and how does it ship?
You are buying the one card in these photographs, sold as-is: an ISEL stepper driver module that was working when it came out of service, clean inside and out, with no cables, mating connectors, rack, manual or documentation. We have not powered it since removal and we make no claim about output current or step behavior, so the photographs and this description are the specification. Treat it as a repair or spare-parts purchase, budget time to verify it on a bench before it drives anything expensive, and if it is not what you expected our satisfaction guarantee covers you. This one clears our free shipping line on its own, and it leaves the Idaho warehouse the same or next business day.
Its transformer still wears a German warning label and its filter capacitor is stamped 01/97, from an era when motion control meant a card you slid into a rack rather than a firmware download. If you are keeping one of those racks alive, here is the slot filler that puts the motor back in motion.
