Product Description

The SS2000MD4‑M is a discontinued bipolar two‑phase micro‑stepping stepper drive manufactured by Superior Electric (SLO‑SYN, Kollmorgen / Danaher Motion SS2000 series). The suffix ‑M denotes micro‑stepping capability, distinguishing it from base SS2000MD4 full‑/half‑step only model.

It operates from 24‑40 VDC power supply, with switch‑selectable phase current from 0.5 A up to 3.5 A per phase, supporting up to 20000 microsteps per revolution for ultra‑smooth low‑speed motor performance. Built‑in functions include automatic stand‑still current reduction, windings‑off output, full short‑circuit, over‑voltage and under‑voltage protection, plus LED diagnostic status indicators. Control inputs are optically isolated for noise immunity.

Designed for panel mounting with integrated aluminum heat sink, this unit is matched with SLO‑SYN M‑series and KM‑series two‑phase stepper motors. Widely used as spare replacement component for legacy handling machinery and custom automation systems. Original OEM production has been terminated; available stock consists of tested‑used and refurbished surplus units. System re‑tuning of current and micro‑step settings is required during commissioning.

Specifications

Part Number: SS2000MD4‑M

Brand: Superior Electric (SLO‑SYN / Kollmorgen Danaher Motion)

Series: SS2000 SLO‑SYN

Product Type: 2‑Phase Microstepping Stepper Drive

Lifecycle Status: Discontinued

Power Input: 24‑40 VDC

Phase Current: 0.5 A‑3.5 A per phase (switch selectable)

Max Microstep Resolution: 20000 steps per revolution

Topology: Bipolar PWM chopper

Key Functions: Auto stand‑still current reduction, Windings‑Off, short‑circuit / over‑voltage / under‑voltage protection

Inputs: Opto‑isolated step & direction signals

Compatible Motors: SLO‑SYN M‑series, KM‑series 2‑phase stepper motors

Mounting: Panel mount with aluminum heat‑sink base

Dimensions: 40 H ×105 W ×83 D mm

Weight: 292 g

Protection Class: IP20

Operating Temperature: 0 °C ~ +50 °C (natural convection cooling)

FAQ

Q: Is SS2000MD4‑M still manufactured? A: No, Superior Electric / Kollmorgen has discontinued SS2000 series stepper drives. Only surplus and tested refurbished units are available.

Q: What is difference between SS2000MD4 and SS2000MD4‑M? A: SS2000MD4 supports only full‑step / half‑step operation. SS2000MD4‑M (‑M suffix) adds high‑resolution micro‑stepping functionality.

Q: What power supply does SS2000MD4‑M require? A: 24‑40 VDC DC power source, AC power cannot be connected directly.

Q: Is there direct drop‑in replacement for SS2000MD4‑M? A: There is no pin‑compatible direct replacement. New stepper drives need wiring modification, current and micro‑step parameter re‑configuration.