VFD500M
Primary candidate for compact, low-power machine panels; supply class and motor current are matched within the shared model window.
Open technical pageLow-power compact drive
INVT GD20-EU and Veikong VFD500M: compact-drive technical selection
Compare GD20-EU and VFD500M for small pumps, fans and conveyors by shared current, low-speed torque, STO, EMC, braking and Modbus.
Short answer
What does this page recommend?
A technical alternative, not a drop-in substitute
VFD500M is a candidate against GD20-EU only within its published supply window around 0.4–7.5 kW. Higher-power GD20-EU models, special STO/EMC variants or existing wiring fall outside this comparison.
Veikong
ProControl products to evaluate first
The exact configuration is selected after engineering review.
VFD200
Economical second family for basic speed control; it is considered only after advanced safety, motor and network requirements are checked.
Open technical pageTechnical comparison
Similar requirement, different architecture
The table explains product architectures; it is not an exact order-code selection.
| Validation area | INVT GD20-EU | Veikong / ProControl candidate |
|---|---|---|
| Model window | GD20-EU offers compact general-purpose models in 230 V and 400 V classes; the upper power limit is selected from the exact catalogue. | VFD500M is matched only within the official 1-phase 200–240 V 0.4–4 kW and 3-phase 380–480 V 0.75–7.5 kW ranges. |
| Low-speed torque | INVT publishes V/f and sensorless vector with 150% torque at 0.5 Hz for GD20-EU. | VFD500M vector performance is measured with the same motor, carrier frequency and autotune conditions; catalogue percentages are not directly equated. |
| STO | The GD20-EU family is positioned with an STO function; certificate and variant are read from the order code. | If documented certified STO is unavailable on VFD500M, the existing safety circuit is redesigned with external components. |
| Braking | GD20-EU integrated braking unit and resistor selection depend on the model table. | VFD500M braking chopper, resistor ohm/watt value and stopping frequency are calculated from the exact-model manual. |
| EMC and panel | GD20-EU is positioned for European machine panels with C2/C3 filter or variant information. | VFD500M's published integrated C3 filter does not prove suitability for the plant environment and cable length; measurement and grounding design are required. |
| Control connections | GD20-EU uses Modbus RTU, analogue/digital I/O and a keypad workflow. | VFD500M is re-addressed with 5 DI, 2 AI, 1 AO and Modbus RTU; terminal numbers or registers are not retained. |
Suitable scenario
When is it worth evaluating?
- Small fan and circulation-pump panels
- Simple conveyors controlled by Modbus RTU
- OEM machines where EMC and safety components can be reselected
Migration gate
Before making a decision
- Record the full GD20-EU code, supply and output current.
- Determine from the safety diagram whether STO is actually used.
- Measure starting torque, maximum frequency and braking time.
- Approve VFD500M I/O, Modbus, EMC and thermal limits from the model manual.
- Complete motor direction, low-speed, fault and emergency-stop tests on a pilot panel.
Frequently asked
Clear answers about alternatives and migration
Is this a drop-in replacement?
No. It is not a direct substitute until exact model, electrical, protocol-role, mechanical, software and certification checks pass.
What should I provide for selection?
The exact existing code, diagram or I/O list, PLC/network data, supply, environment and special functions in use.
Can VFD500M be selected for a higher-power GD20-EU model?
The published VFD500M power/current table must not be exceeded. At higher current, VFD500 or another suitable Veikong family is sized separately.
Official manufacturer sources: INVT GD20-EU official product page · INVT GD20-EU official catalogue · Veikong VFD500M official product page
This content compares manufacturer-published data under the same project requirement; it does not guarantee direct substitution or project compatibility. ProControl engineering must validate exact model, revision, protocol, electrical, safety and environmental conditions.
Validate the match with an engineer
Share the exact existing code, I/O list, network and environment so we can identify the right solution without assumptions.