Model Code Definition

• 370: Rated power 37 kW, rated output current 75 A

• 503: 3-phase 380–500 V AC input, without integrated EMC filter

• 4: 4-quadrant operation with regenerative braking

• 00: Standard configuration, no STO, no fieldbus interface

Technical Parameters

Input

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

• Frequency: 50 / 60 Hz (±10%)

• Rated input current: 69 A @ 400 V

Output

• Rated power: 37 kW (50 HP)

• Rated output current: 75 A @ 400 V

• Apparent power: 52 kVA

• Frequency range: 0–400 Hz

• Overload capability: 150% rated current for 60 s; 180% rated current for 2 s

Control & Interfaces

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

• Digital I/O: 7 inputs, 2 outputs, 1 relay output

• Analog I/O: 2 inputs, 2 outputs

• Safety feature: No STO

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

Mechanical & Environmental

• Protection class: IP20

• Operating temperature: 0 °C ~ +45 °C

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

• Dimensions (W×H×D): 220 × 550 × 265 mm

• Weight: 21.8 kg

Main Features

1. Energy regeneration design recycles braking energy to the grid and eliminates external brake resistors.

2. Dual control modes deliver stable speed and torque for motor operation.

3. Compact structure, easy to install in standard control cabinets.

4. Complete protection system ensures reliable operation in industrial scenarios.

Application Scope

Relevant Models

• 31C370-503-4-05: Standard temperature, with STO, no fieldbus

• 31C370-503-4-07: Wide temperature range, no STO, no fieldbus

• 31C370-503-4-20: Standard temperature, with PROFIBUS-DP, no STO

• 31C370-503-4-25: Standard temperature, with PROFIBUS-DP and STO