Description

About MD520 AC Drive

Key features and functions of the MD520

• AC asynchronous, PM synchronous and synchronous reluctance motors control:
  • Open loop V/F (induction motors only) and SVC
  • Closed loop FVC
• Dual rated: heavy duty (overload: 150%/ 1 min) and normal duty (overload: 110%/ 1 min).
• Starting torque:
  • 150% at 0.25 Hz for SVC
  • 180% at 0 Hz for FVC
• Communication options:
  • Modbus-RTU
  • Modbus-TCP
  • PROFIBUS-DP
  • CANopen
  • CANlink
  • PROFINET
  • EtherCAT
  • Ethernet/IP
• Category C2 compliance with external RFI filter. Ratings with built-in filter comply with Category C3.
• Built-in dynamic braking unit, up to/including 75 kW (400 V) or 37 kW (200 V).
• Operation in ambient temperature of up to 50ºC (with de-rating above 40ºC).
• Bipolar analog input as standard (-10 to +10 V).
• PTC input as standard.
• Simplified parameters for easy start up.
• 4 independent S-ramps.
• Flexible programmable I/Os.
• User programmable logic.
• Variable DC-injection braking.
• Comprehensive trip diagnostics.
• Output frequency: 599 Hz.
• Application dedicated functions:
  • Master-slave function (torque, speed)
  • Textile wobble control
• Brake control logic.
• 4 motor parameter sets.
• Automatic torque boost.
• PC-based software: simplified start up & backup.

NEW: built-in colour LED keypad!

Option cards and mounting position

General wiring diagram

Parameters

Order code	MD520-4T0.4BS-INT
Rated power	– 0.4 kW (heavy duty) – 0.75 kW (normal duty)
Supply voltage	3-phase, 400V
Rated current	– 1.5 A (heavy duty) – 2.1 A (normal duty)
Control Type	– Open loop scalar V/F (induction motors only), – Open loop sensorless vector control SVC, – Closed loop vector control FVC (encoder or resolver)
Output frequency	0-599Hz
Starting torque	– 150% at 0.25 Hz in SVC vector control – 180% at 0 Hz in FVC vector control
Speed ​​regulation ratio	1:200 (SVC) / 1:1000 (FVC)
Overload capacity	150% for 60 seconds
STO functionality	STO input compliant with SIL 3/PLe (IEC 61508 / ISO 13849)
Feedback	– incremental encoders (optional card MD38PGMD) – 23-bit serial encoders (optional card ES510-PG-CT1) – resolver (card for cooperation with resolver MD38PG4)
Protective coating	PCBs covered with a coating compliant with IEC 60721-3- 3, resistant to environments of classes 3C2 (chemical gases) and 3S2 (solid particles)
Analog inputs	– 1 voltage (0-10V, ±10V) – 1 selectable: voltage (0-10V, ±10V) / current (0-20 mA) / temperature (PT100, PT1000, KTY84-130, PTC-130)
Digital inputs	5 NPN/PNP inputs, including one fast up to 100 kHz
Analog output	selectable 0-10V; 0-20mA
Digital outputs	– 1 relay (NO/NC) – 2 transistor (open collector): including one also as pulse 0 – 100 kHz
Communication	Modbus RTU, Modbus, TCP, EtherCAT, Ethernet/IP, Profinet, Profibus-DP, CANopen, CANlink (options)
Braking	– DC braking – built-in braking chopper – possibility of connecting a braking resistor
Certificates	CE and UL
Operating temperature	-10°C~+50°C
Cooling	natural
Degree of protection	IP20

Dimension

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