31C011-503-4-20
May 18, 2026

31C011-503-4-20

Brand: SEW-EURODRIVE Model: 31C011-503-4-20 Series: MOVITRAC 31C Compact Inverter Rated Power: 1.1 kW Voltage Grade: 3-phase 380~500 V AC Version: 20 = Built-in PROFIBUS-DP communication

Description

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1. Model Code Definition

31C = MOVITRAC 31C compact lightweight series
011 = Rated output power 1.1 kW
503 = 380~500 V AC voltage class
4 = Three-phase AC input with built-in brake chopper
20 = Integrated PROFIBUS-DP fieldbus interface

2. Electrical Parameters

  • Rated Output Power: 1.1 kW

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

  • Rated Frequency: 50 Hz / 60 Hz

  • Rated Continuous Output Current: 3.2 A

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

  • Output Frequency Range: 0~400 Hz

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

  • Overload Capacity: 150% rated current for 60 seconds

  • Switching Frequency: 4kHz, 8kHz, 12kHz, 16kHz optional

  • Standard built-in STO Safe Torque Off function

3. Physical & Environmental Parameters

  • Protection Class: IP20

  • Cooling Method: Natural air cooling without cooling fan

  • Operating Temperature: 0°C ~ +45°C under full load

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

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

  • Installation Type: Vertical wall mounting

  • Maximum Working Altitude: ≤1000 meters without power derating

  • Weight: Approximately 2.2 kg

4. Control Terminals & Communication Interfaces

  • Analog speed input: 0-10V DC / 0-20mA dual signal mode

  • 6 sets of programmable 24V DC digital input terminals

  • 2 sets of programmable relay signal output terminals

  • PTC motor over temperature protection input port

  • External brake resistor connection terminal

  • Multi-section fixed speed control terminals

  • Reserved RS485 Modbus RTU communication interface

  • Core configuration: Onboard integrated PROFIBUS-DP interface

  • PROFIBUS parameters: Adjustable station address, support standard GSD file, stable industrial bus transmission

  • No built-in operation panel, support external FBG31C keypad for parameter setting

5. Main Operating Functions

  • Adjustable acceleration and deceleration time range: 0.1 seconds to 600 seconds

  • Built-in DC braking and dynamic braking function for rapid stop

  • Intelligent energy-saving operation mode

  • Three control modes: external terminal control, fieldbus remote control, panel local control

  • Slip compensation function to ensure stable running speed under load

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

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

  • Support parameter saving, copying and one-click restore functions

  • Excellent low-speed high-torque output performance

6. Complete Safety Protection System

  • Instantaneous overcurrent protection and thermal overload protection

  • Over voltage and under voltage fault protection

  • Three-phase input phase loss detection and protection

  • Inverter internal power module overheating protection

  • Electronic thermal type motor overload protection

  • Output loop short circuit fault protection

  • Motor side earth fault protection

  • Running anti-stall protection function

  • Static electricity protection for control terminals

  • Hardware-level STO safety torque off protection conforming to industrial safety standards

7. Installation & Wiring Requirements

  1. Cut off all power supply before wiring, debugging and daily maintenance

  2. Separate power main circuit cables and control signal cables to avoid electromagnetic interference

  3. Ensure firm and reliable connection of PE grounding terminal

  4. Reserve sufficient surrounding space for natural heat dissipation

  5. Do not install in dusty, humid, oily mist and corrosive gas environment

  6. It is recommended to use shielded special frequency conversion cables for motor output wiring

8. Standard Commissioning Steps

  1. Check all wiring carefully to eliminate wrong connection and short circuit hidden dangers

  2. Confirm that on-site input power voltage matches inverter rated voltage specification

  3. Accurately set motor nameplate parameters including rated voltage, rated current, rated frequency and rated speed

  4. Select PROFIBUS bus control or terminal control mode according to actual system requirements

  5. Set reasonable acceleration/deceleration time and upper and lower limit frequency values

  6. Perform no-load trial operation firstly to confirm motor running direction and operating sound

  7. Gradually load operation and formally put into use after stable operation

9. Daily Maintenance Rules

  • Regularly clean surface dust every 3 to 6 months

  • Periodically check the fastening condition of all wiring terminals

  • Monitor real-time operating current and internal working temperature during operation

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

10. Application Scope

1.1kW small three-phase asynchronous motor speed regulation control
Light industrial automation supporting production equipment
Small fan and water pump energy-saving frequency conversion speed regulation
Packaging machinery, textile auxiliary machinery and mini conveying equipment
Industrial automation production line with PROFIBUS-DP fieldbus network
All kinds of low-power variable frequency drive systems requiring bus communication

11. Industry Compliance Certification

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


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