31C022-503-4-00
May 18, 2026

31C022-503-4-00

Brand: SEW-EURODRIVE Model: 31C022-503-4-00 Series: MOVITRAC 31C Compact Inverter Rated Power: 2.2 kW Voltage Grade: 3-phase 380~500 V AC Version: 00 = Standard type with RS485 communication, no built-in keypad

Description

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1. Model Code Explanation

31C = MOVITRAC 31C compact series
022 = Rated output power 2.2 kW
503 = 380~500 V AC voltage class
4 = 3-phase input, built-in brake chopper
00 = Standard configuration, RS485 Modbus, no fieldbus, no built-in keypad

2. Electrical Specifications

  • Rated Output Power: 2.2 kW

  • Input Voltage: 3-phase AC 380~500 V

  • Rated Frequency: 50 Hz / 60 Hz

  • Rated Continuous Output Current: 5.9 A

  • Output Voltage Range: 0~480 V 3-phase AC

  • Output Frequency Range: 0~400 Hz

  • Control Mode: V/F open-loop / Sensorless vector control

  • Overload Capacity: 150% rated current for 60 seconds

  • Adjustable Switching Frequency: 4kHz / 8kHz / 12kHz / 16kHz

  • Standard equipped with STO Safe Torque Off function

3. Physical and Environmental Parameters

  • Protection Class: IP20

  • Cooling Mode: Natural air cooling

  • Full-load Operating Temperature: 0°C ~ +45°C

  • Storage Temperature: -25°C ~ +70°C

  • Working Humidity: 5%~95%, non-condensing

  • Installation Method: Vertical wall mounting

  • Max applicable altitude: ≤1000m without power derating

  • Approximate Weight: 2.8 kg

4. Standard Interfaces

  • Onboard RS485 interface, support Modbus RTU protocol

  • Dual analog input: 0-10V DC / 0-20mA

  • 6 programmable 24V DC digital input terminals

  • 2 programmable relay output terminals

  • PTC motor over-temperature protection input

  • Brake resistor connection terminal

  • Multi-step speed control terminals

  • Support external FBG31C operation panel for parameter setting

5. Main Functions

  • Acceleration and deceleration time adjustable from 0.1s to 600s

  • Built-in DC braking and dynamic braking for fast stopping

  • Intelligent energy-saving running mode

  • Three control modes: panel control, terminal control, communication control

  • Slip compensation function for stable speed under load

  • Soft start and soft stop to reduce impact current and mechanical vibration

  • Integrated PID closed-loop control for constant speed and constant pressure

  • Parameter save, copy and restore functions available

  • Excellent low-speed high torque performance

6. Protection Functions

  • Instantaneous overcurrent and thermal overload protection

  • Overvoltage and undervoltage protection

  • Input phase loss detection and protection

  • Inverter internal overheat protection

  • Electronic thermal motor overload protection

  • Output short circuit and earth fault protection

  • Anti-stall protection

  • ESD protection for control terminals

  • Hardware STO safety torque off protection

7. Installation and Wiring Requirements

  1. Cut off power supply before wiring, commissioning and maintenance

  2. Separate power cables and control cables to avoid interference

  3. Ensure reliable PE grounding connection

  4. Keep sufficient space around for heat dissipation

  5. Avoid installation in dusty, humid, oily and corrosive environments

  6. Use shielded dedicated frequency conversion cables for motor wiring

8. Basic Commissioning Steps

  1. Check all wiring to eliminate wrong connection and short circuit risks

  2. Confirm input voltage matches inverter rated voltage level

  3. Set motor rated voltage, current, frequency and speed correctly

  4. Select appropriate control mode according to on-site requirements

  5. Set reasonable acceleration/deceleration time and frequency limit

  6. Perform no-load test run to check motor running status

  7. Put into formal load operation after stable operation

9. Daily Maintenance

  • Clean surface dust every 3-6 months regularly

  • Periodically check the tightness of all wiring terminals

  • Monitor running current and internal temperature during operation

  • All maintenance and fault inspection must be operated by qualified professional electricians

10. Application Scope

2.2kW three-phase motor speed regulation
Medium and small industrial automation equipment
Industrial fans, water pumps energy-saving speed control
Packaging machinery, textile machinery, conveying equipment
General-purpose variable frequency drive systems
Equipment requiring Modbus RTU remote communication control

11. Compliance Standards

CE low voltage safety certification
Meet EN61800-3 EMC electromagnetic compatibility standard
Comply with RoHS environmental protection standard
STO safety function meets PL d and SIL2 safety standards

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