Delta VFD2A7MS43MFSAA VFD-MS300 0.75kW Drive

VFD2A7MS43MFSAA MS300 Compact AC Drive for Precise Motor Control

Product Introduction

The Delta VFD2A7MS43MFSAA is a high-performance VFD-MS300 series AC drive. It delivers 0.75kW (1HP) of output power at 460V three-phase. This drive handles 2.7A heavy duty (HD) and 3.0A normal duty (ND) currents. Additionally, it supports a wide frequency range from 0 to 599Hz. Its compact footprint saves 40% panel space compared to older Delta models. Meanwhile, the NEMA4X enclosure provides robust protection for harsh industrial settings. The built-in EMC filter reduces electromagnetic interference. Therefore, this drive complies with strict EMC standards.

Key Technical Specifications

Control Methods
The VFD2A7MS43MFSAA offers two primary control modes: V/f (Volt/Hertz) and Sensorless Vector. Sensorless vector control enables high starting torque up to 200%. Moreover, it maintains precise speed regulation even without an encoder. Low-speed performance remains excellent: 0.5Hz for induction motors and 0.0Hz for permanent magnet motors.

Motor Compatibility
This MS300 drive supports three motor types seamlessly:

• Induction Motors (IM)

• Interior Permanent Magnet Motors (IPM)

• Surface Permanent Magnet Motors (SPM)
  Therefore, you can use the same drive across different motor technologies without changing hardware.

Power Ratings

• Heavy Duty (HD): 2.7A

• Normal Duty (ND): 3.0A

• Output Power: 0.75kW (1HP)

• Input Voltage: 460V three-phase

• Output Voltage: 460V three-phase
  The drive also comes with adjustable output current up to 120% of its nominal capacity. This feature provides extra overload capability for demanding applications.

Frequency and Speed Control
Programmable speed ranges from 0 to 599Hz. This broad range suits high-speed applications like spindles and centrifugal compressors. Furthermore, the built-in PLC with 2K step capacity enables standalone automation tasks. You can program simple logic sequences without needing an external controller.

Built-in Protection and Safety Features

The VFD2A7MS43MFSAA prioritizes operator and equipment safety. It includes Safe Torque Off (STO) for emergency stop functions. This power removal safety feature meets international machinery safety standards.

Environmental Protection

• IP20 standard rating (IP21 optional with conduit box)

• Conformal coated circuit boards (IEC60721-3-3, class 3C2)

• Operates reliably up to 50°C ambient temperature

• RFI switch for IT mains networks
  Specifically, the conformal coating protects against humidity, dust, and chemical vapors. Therefore, this drive suits textile mills, food processing plants, and outdoor pump stations.

Energy Saving and Braking
The deceleration energy back function recovers braking energy. This reduces overall power consumption. Additionally, built-in dynamic braking transistors allow rapid deceleration without external braking units for most applications.

Connectivity and I/O Capabilities

Digital Inputs
Nine digital inputs are available. Two are dedicated to STO safety. The remaining seven are programmable. You can configure them as NPN or PNP types to match your existing sensors and switches.

Analog Inputs
Two analog inputs support multiple signal types:

• 0 ~ 10V

• -10 ~ +10V

• 0 ~ 20mA

• 4 ~ 20mA

• PTC thermistor

• RTD PT100
  This flexibility allows direct connection to pressure transducers, temperature sensors, and speed potentiometers.

Outputs

• 1 digital output (dry contact: 1 NO, 1 NC)

• 2 open collector transistor outputs

• 1 digital frequency output

• 1 analog output (programmable: 0 ~ 10V, 0 ~ 20mA, 4 ~ 20mA)
  These outputs enable status monitoring, alarm signaling, and speed feedback to external PLCs or SCADA systems.

Communication Protocols and Networking

Standard Ports

• Channel 1: USB (front port for quick configuration)

• Channel 2: RS-485 (RJ-45 connector with SG+, SG-, SGND terminals)

Resident Protocols

• Modbus RTU

• Modbus ASCII

Optional Communication Cards
You can install one option card in the dedicated slot. Supported protocols include:

• Profibus DP

• DeviceNet

• Modbus TCP

• Ethernet/IP

• CANopen
  Consequently, the VFD2A7MS43MFSAA integrates easily into new or legacy automation networks. The real-time clock and calendar add timestamping for event logging and predictive maintenance schedules.

Application Macros and Built-in Functions

Delta pre-programs application macros for common industrial tasks. These macros simplify parameter setup and reduce commissioning time. Supported applications include:

• Compressors

• Fans

• Pumps

• Conveyors

• Packaging machinery

• Textile equipment

• Machine tools
  Specifically, the pump and fan macros include sleep/wake functions and PID control. The conveyor macro offers smooth acceleration profiles to reduce mechanical stress. Additionally, the drive includes a 2K-step PLC. You can write simple logic programs directly. This eliminates the need for a separate small PLC in basic control scenarios.

Installation and Mounting Guidance

Mechanical Dimensions
The compact design saves 40% panel space. This makes it suitable for retrofit projects where cabinet space is limited. Mount the drive vertically on a flat, non-combustible surface. Ensure adequate clearance for airflow.

Electrical Connections
Use the quick-connect spring set control terminals. These terminals reduce wiring time and ensure reliable connections. For power wiring, follow the torque specifications in the user manual. Use shielded cables for analog and communication lines to minimize noise.

Environmental Considerations

• Operating temperature: -10°C to +50°C

• Storage temperature: -40°C to +70°C

• Humidity: 95% RH (non-condensing)

• Altitude: up to 1000m without derating
  For installations above 1000m, apply derating according to the manual. The conformal coating provides additional protection in high-humidity environments.

EMC Compliance
The built-in EMC filter and RFI switch ensure compliance with European and international EMC standards. For IT mains (ungrounded systems), turn on the RFI switch. For TN/TT mains, turn it off.

Packaging List

• Delta VFD2A7MS43MFSAA AC drive (1 unit)

• Quick-start guide (1 copy)

• Mounting screws (4 pieces)

• Control terminal labels (1 set)

• Communication RJ-45 connector plug (1 piece)

• Grounding bar and screw (1 set)

Note: The user manual is available for download from Delta’s official website.

Shipping and Delivery

We ship all orders via FedEx, UPS, or DHL express services. Tracking numbers are provided within 24 hours. Delivery typically takes 3–7 business days depending on your location.

Frequently Asked Questions (FAQ)

1. What motors can I use with the VFD2A7MS43MFSAA?
You can use induction motors (IM), interior permanent magnet motors (IPM), and surface permanent magnet motors (SPM). Simply select the corresponding motor type in parameter settings.

2. Does this MS300 drive require an external braking resistor?
Not for most applications. The built-in dynamic braking transistors handle normal deceleration. For very high inertia loads or frequent braking, you may add an external resistor.

3. How do I connect the drive to a Modbus network?
Use the RS-485 terminal block (SG+, SG-, SGND). The drive supports Modbus RTU and ASCII natively. Set the station address and baud rate via parameters.

4. What is the difference between HD and ND ratings?
Heavy Duty (HD) applies to constant torque loads like conveyors. Normal Duty (ND) suits variable torque loads like fans and pumps. The current rating differs accordingly.

5. Can I use this drive at high altitudes?
Yes, up to 1000m without derating. Above 1000m, derate the output current by 1% per 100m increase. Refer to the manual for exact derating curves.