SJE-Rhombus Engineered Controls - VFD Pressure Controls

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Endura™ MD Control Panel

1 - 4 Pump Control Applications (1VFD/Pump)

The Endura™ MD control panels feature the VFDC-4000 Controller for commercial pressure booster applications using 1-4 VFDs.

The Endura™ MD (Multiple Drives) Control Panel is designed for commercial pressure booster applications using 1-4 variable frequency drives (VFDs). Each panel is equipped with the VFDC-4100 Controller and one VFD for each pump.  

The Endura™ MD Control Panel can be configured for simplex, duplex, triplex and quadplex pump control using a single variable frequency drive per pump.  SJE-Rhombus is a UL certified panel shop that can customize the VFDC-4100 control panel to suit specific requirements. 


Endura™ MD Control Panel


Standard Control Panel:

  • NEMA Type 1 wall mount enclosure (indoor)
  • Cooling fan + filter and thermostat for VFD ventilation
  • Panel mounted Variable Frequency Drives
  • VFDC-4100 pressure booster controller mounted on door
  • VFD circuit breakers
  • 24 VDC power supply
  • 0-200 PSI pressure transducer with 20 ft. cable
  • System MAN/OFF/AUTO switch
  • Manual ON/OFF switches
  • Main terminal blocks
  • Pump terminal blocks
  • Pressure transducer terminal blocks
  • Alarm auxiliary contact
  • Low water alarm terminal (low suction/level)
  • Automatic start on low pressure
  • Automatic stop on low pump speed
  • UL/cUL Listed

VFDC-4100 Controller:

  • 1 - 4 VFD control
  • PID control
  • Graphic screen display with LED back light
  • System status display:
    • Operating pressure
    • Set pressure
    • Time and date
    • Alarm with time and date
  • Pump status display
    • Pumps in use
    • Lead pump
    • Pump run/stop
    • Pump speed
    • VFD fault
    • Hour meter for each pump
  • Four (4) arrow buttons for easy navigation and setup
  • Automatic alternation (cycle-based or timed-based)
  • 13 programmable digital outputs
  • Scheduled pressure setup function
  • Jockey pump operation (smaller lead pump)
  • Pressure transmitter setup
  • Password protection
  • RS232 Modbus Serial communication
  • Low pressure alarm
  • High pressure alarm
  • Low suction pressure/low level with programmable restart

Endura™ MD control panel


  • Main disconnect
  • Line reactors
  • Load reactors
  • dV/dt filter
  • Larger HP VFDs
  • NEMA 12, NEMA 3R, NEMA 4 and NEMA 4X enclosures
  • Free standing enclosures
  • Low suction pressure transducer
  • CSA Certification



Endura™ MD Control Panel


For specifications on the Endura™ MD (Multiple Drives) control panel, please contact the factory at 1-888-342-5753.


Available Downloads

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