Model Code Explanation

• 31C: MOVITRAC 31C series, compact regenerative drive

• 022: Rated power 3.0 kW, rated output current 6.5 A

• 503: 3-phase 380–500 V AC input, no built-in EMC filter

• 4: 4-quadrant operation with regenerative braking and grid energy feedback

• 05: Standard firmware with STO safety function, no fieldbus module

Technical Specifications

Input

• Rated voltage: 3-phase AC 380–500 V (±10%)

• Input frequency: 50 / 60 Hz (±10%)

• Rated input current: 5.8 A

Output

• Rated power: 3.0 kW

• Rated output current: 6.5 A

• Apparent power: 4.5 kVA

• Frequency range: 0–400 Hz

• Overload capacity: 125% rated current for continuous operation; 150% rated current for 60 seconds

Control & Interfaces

• Control modes: V/F open-loop control, sensorless vector control (VFC)

• Digital I/O: 6 digital inputs, 2 digital outputs, 1 relay output

• Analog I/O: 2 analog inputs, 2 analog outputs

• Safety function: STO (Safe Torque Off), compliant with EN 61508 SIL 2 and EN 60204-1 Category 3

• Protection functions: Overcurrent, overvoltage, undervoltage, overtemperature, earth fault and short circuit protection

Mechanical & Environmental Data

• Protection class: IP20

• Operating temperature: 0 °C to +45 °C. Power derating is required above 40 °C.

• Storage temperature: -25 °C to +70 °C

• Dimensions (W×H×D): approx. 127 × 165 × 178 mm

• Weight: approx. 2.2 kg

Key Features

1. 4-quadrant energy regeneration

   Braking energy is recycled to the grid. No external brake resistor is required to cut costs and save installation space.
2. Built-in STO safety function

   The integrated Safe Torque Off complies with industrial safety standards, which can reliably disable motor torque to protect personnel and equipment.
3. Compact design

   The small size enables easy installation inside standard control cabinets.
4. Stable performance & comprehensive protection

   Two control modes ensure steady speed and torque output. Multiple protection functions guarantee long-term reliable operation.

Typical Applications

Related Models

• 31C022-503-4-00: 3.0 kW, 4-quadrant regenerative inverter, no STO and no fieldbus

• 31C022-503-4-20: 3.0 kW, 4-quadrant regenerative inverter with PROFIBUS-DP

• 31C022-503-4-25: 3.0 kW, 4-quadrant regenerative inverter with PROFIBUS-DP and STO