Sayport Variable Frequency Drives

Sayport variable frequency drives are used for speed and frequency control of AC motors in general machine and automation applications. This section contains the Sayport VFD models currently listed on our website together with the relevant technical information.

Different generations of Sayport drives may use different parameter structures, operator panels and control functions. Before changing parameters or replacing a drive, always identify the complete model number and series of the installed unit.

Sayport VFD Voltage Classes

Sayport drive families have been supplied in different input-voltage versions, including:

- Single-phase 230 V class
- Three-phase 400 V class

When selecting a replacement VFD, do not rely only on the motor kW rating. The motor rated current, supply voltage and mechanical load should also be checked.

Motor Speed and Frequency Control

A Sayport inverter controls AC motor speed by varying the output frequency supplied to the motor. Technical information for older Sayport drive families lists an output-frequency range extending up to 650 Hz on some models.

The maximum VFD frequency should not automatically be treated as a safe motor operating speed. Motor bearings, cooling, mechanical construction and the maximum permissible speed of the driven machine must also be considered.

Sayport E1000 and F1500 Series

Older Sayport documentation includes drive families such as E1000 and F1500. Parameter numbers and operating functions may differ between these series, so a parameter table from one Sayport model should not be applied to another series without verification.

Before Selecting a Sayport Drive

- Check the incoming supply voltage.
- Verify the motor rated current and power.
- Consider starting torque and operating load.
- Determine the required minimum and maximum frequency.
- Set acceleration and deceleration according to the machine.
- Check whether dynamic braking is required.
- Determine the required analog inputs, digital I/O and communication functions.

Replacing an Older Sayport VFD

If an older Sayport inverter is no longer available, another VFD can often be selected as a replacement. The replacement should not be chosen only by matching the power rating.

Compare at least the following:

- Motor rated current
- Supply voltage
- Motor connection
- Digital input and output functions
- Analog speed-reference type
- Braking resistor requirement
- RS485 or other communication requirements
- Normal-duty or heavy-duty load characteristics

Fault Codes and Parameter Checks

If the Sayport drive displays a fault code, record the code before resetting the inverter. Repeated faults should be investigated together with the motor, supply voltage, mechanical load, output wiring and related VFD parameters.

When working on an older unit, first confirm whether the drive belongs to the E1000, F1500 or another Sayport series. Parameter numbers from a different series should not be used without checking the correct manual.

Sayport Product Availability

Availability of older Sayport models can vary. If a listed model is out of stock, the existing warehouse stock or a technically compatible replacement VFD can be checked separately.

Related Technical Pages

+ Variable Frequency Drives

+ VFD Accessories

+ What is a Braking Resistor?

+ Modbus RS485 Communication