VFD Control for Single & Three Phase Motors / SmartFan® Stratus II

Competitively priced, 4-Amp Rated Single Phase Power
– for a single phase or 3 phase fan/motor.

SmartFan Stratus II VFD (variable frequency drive) is designed to control single or three-phase fractional HP, inverter grade motors via a transducer (voltage or current signal), building automation system (voltage, current signal, Modbus), thermistor, potentiometer, contact closure, or Modbus RTU network.

7 Programmable Control Modes & 18 Programmable Variables

The SmartFan Stratus II VFD offers advanced control capabilities with 7 programmable control modes and 18 programmable variables. This flexibility allows for precise customization and optimization of motor performance based on specific application requirements.

AC Motor Compatibility

For a comprehensive understanding of the Stratus II variable frequency drive motor requirements and associated risks, refer to our detailed explanation of AC Motor Compatibility.

Complete Customization

This VFD can be customized in minutes using the menu-driven SmartFan Navigator handheld remote programmer or through the Modbus communications port.

Do you have application-specific requirements? The CRI team can work with you to develop a custom design, suited for your needs.

Controller Comparison & Motor Efficiency: Technical Insights on Stratus II VFD

Our article on Controller Comparison & Motor Efficiency provides a technical comparison of the SmartFan Stratus II AC variable frequency drive with other control technologies.

Control Resources SmartFan Stratus II AC Variable Frequency Drive Features

  • VFD Control for Single & Three Phase Motors
  • 7 Programmable Control Modes & 18 Programmable Variables
  • PID Plus programming for constant pressure or flow
  • $130 each for 50-piece orders as low as $104 in volume

Specifications

  • Input Power: 115 / 240 VAC, 47-64 Hz, single phase, 5.7A
  • Output Power: 115 / 240 VAC, 0-400 Hz, single phase or 3-phase, 4A
  • For use with inverter-grade motors
  • Accessory Output: 5VDC @ 50mA
  • Control Options:
    • 0-5VDC or 0-10VDC
    • 4-20mA
    • PID Plus (constant pressure, constant flow…)
    • Potentiometer
    •   Temperature (thermistor)
    •   Transducer
    •   Modbus
    •   Fixed Speed 
  • Operation Temperature: -20°C to 40°C
  • Storage Temperature: -40°C to 125°C
  • Relative Humidity: 95% non-condensing
  • Weight: VFD400E-F – 32oz (905g); VFD400-F – 22oz (625g)
  • UL and RoHS compliant
  • Recognized to UL508C, File E331664

Features / Selectable Options

  • Three programming options:
    • SmartFan Navigator PRG02-F handheld remote
    • Windows PC USB port using a Modbus master application
    • Factory customization and programming for orders as small as 50 pieces
  • Programmable variables include:
    • Control slope, 4 variables including on/off at idle
    • Alarm trigger point and direction
    • Ramp up and ramp down rates
    • Programmable current limit up to 10 Amps
    • PWM frequency
    • Motor frequency and direction
    • Contact closure polarity and frequency
  • Over temperature protection
  • Available with or without metal safety enclosure
  • Contact closure allows settable on/off override option
  • Onboard status LEDs
  • Warranty: 2 years
  • Made in the USA

Stratus II VFD Dimensions

For CAD drawings, use the links in Additional Information below.

Stratus II VFD Part Numbers

Part No.Description
VFD400E-FStock Product, includes metal safety enclosure
VFD400-FNo enclosure
VFD401-FMODBUS, Contact Closure and Fixed speed inputs only, no enclosure (10 piece minimum order)
PRG02-FStratus II Navigator remote hand-held programmer (for purchase or rent)
VFD4KIT-FEvaluation kit includes: (1) Stratus II VFD400E-F, (1) Navigator remote programmer PRG02-F, power and motor connection hardware

Modbus Support Links

Modbus communications support
Modbus master program
  • We use ModScan 23 from Win-Tech which offers a free demo version: win-tech.com
  • Note: this demo is fully functional for one hour and then you have to start it again
RS232 or USB to RS485 converters
  • We use B&B Electronics model BB-USPTL4-LS for our USB to RS-422/485
  • Note: These converters are isolated to protect your equipment
USB Driver

Additional Information

• Stratus II Standard Installation Guide
• Status II MODBUS Control Installation Guide
• Stratus II STEP CAD drawing (.step)
NOTE: If the CAD file opens as a new browser window with text, right-click the link, select “Save Link As”, and select a local folder to save the file.
• Price List