Copley Controls ST3-055-04 is a three-axis CANopen stepper motor driver that combines CANopen networking with 100% digital control of stepper motors. The product uses a 13-square-inch package that can drive three stepper motors simultaneously, and its power output is compatible with most NEMA 17 and 23 stepper motors.
The Stepnet ST3-055-04 is a 3‑axis CANopen stepper motor driver that combines CANopen networking with fully digital control. It fits three stepper motor drivers in a compact 121 × 70 × 27 mm package and supports NEMA 17 and NEMA 23 stepper motors. Configuration is performed with CME 2 software over an RS‑232 link, and the device can operate as a CANopen node using the DSP‑402 motion‑control profile.
The manual covers general specifications, mechanical dimensions, environmental limits, connector pin‑outs, digital and analog I/O, CANopen and RS‑232 communication, LED status indicators, mounting and cooling guidelines, and an ordering guide with part numbers for accessories.
| Peak current per axis | 4 A (2.8 A RMS) |
|---|---|
| Continuous current per axis | 2 A (1.4 A RMS) |
| Output power per axis | 100 W |
| Input voltage range (HV) | +18 V to +55 V DC |
| Digital inputs | 15 |
| Digital outputs | 4 |
| Analog inputs | 3 (±10 V) |
| Operating temperature range | 0 °C to +45 °C (storage –40 °C to +85 °C) |
It supports CANopen bus control and an RS‑232 port for configuration and control.
The driver provides 15 high‑speed digital inputs and 4 programmable digital outputs.
The high‑voltage input accepts a DC range from +18 V to +55 V.
Yes, an auxiliary HV input keeps the driver data and CANopen operation alive when the main HV is lost.