EM-314A is a bipolar chopper-type microstepping stepper motor controller designed for precise motion control. The bipolar drive principle provides optimal torque for most stepper motors, while microstepping enables smooth and stable operation, especially at low speeds.
The controller offers seven selectable stepping modes ranging from full step to 1/64 microstepping, allowing optimization between torque, resolution, and speed depending on the application.
The integrated auxiliary oscillator allows standalone operation with preset speeds. These speeds can be activated using four digital inputs.
The oscillator includes an adjustable acceleration ramp, enabling smooth transitions between speeds and reliable startup even at higher frequencies without loss of motion stability.
The controller includes an indexing function for executing predefined motion sequences. A sequence defines:
Sequences are activated using four digital inputs, enabling repeatable movements without external control logic.
All parameters are configured digitally using the EM-236 Interface Unit. This allows fast setup and easy duplication of settings across multiple controllers.
| Operating voltage | 12–48 VDC (10–60 V) |
| Idle current | Approx. 20 mA |
| Current setting range | 0.1 – 6 A (step 0.1 A) |
| Auxiliary oscillator | 50 – 10 000 Hz |
| Frequency accuracy | typ. 0.5% |
| Ramp adjustment | 0.1 – 5 s (0 → 10 000 Hz) |
| Max step frequency | 15 kHz |
| Control input level | "ON" = 4–30 V / "OFF" = 0–1 V or open |
| RS-485 | Half-duplex, 9600 / 19200 baud (Modbus RTU) |
| Operating temperature | 0 … +50 °C |
| Dimensions | 87 × 72.5 × 25 mm |
| Weight | 310 g |
