VFD500
General-purpose vector-drive candidate; current, duty class, STO and network card are verified from the exact order code.
Open technical pageGeneral-purpose compact AC drive
Siemens SINAMICS G120C and Veikong VFD500: technical alternative selection guide
Compare G120C and VFD500 by motor control, duty class, safety, communications, braking and commissioning on a project basis.
Short answer
What does this page recommend?
A technical alternative, not a drop-in substitute
VFD500 is not a part that can replace G120C while retaining its connections. It can be a technical candidate for conveyors, pumps, fans or general machinery when motor nameplate current, HD/ND duty, safety and Siemens-network integration can be re-engineered.
Veikong
ProControl products to evaluate first
The exact configuration is selected after engineering review.
VFD530
Second candidate for projects needing IM/PMSM, PG feedback and machine logic; the safety function is engineered separately.
Open technical pageTechnical comparison
Similar requirement, different architecture
The table explains product architectures; it is not an exact order-code selection.
| Validation area | Siemens SINAMICS G120C | Veikong / ProControl candidate |
|---|---|---|
| Application and power window | Siemens positions G120C as a 0.55–132 kW compact-drive family; exact selection depends on voltage and current. | For VFD500, only output current and duty rows in the same supply class are matched; VFD530 is assessed separately when PG or PMSM is required. |
| Motor and control | The official G120C page specifies sensorless vector control; motor and control mode are selected in the order-code/firmware context. | VFD500 supports assessment of V/f and sensorless vector, with optional closed-loop operation; motor type and autotune are verified in a field test. |
| Safety chain | The G120C family includes integrated STO, with project details varying across the Siemens safety ecosystem. | The presence of STO on VFD500 is not sufficient; terminal behaviour, certification level, stop category and external-contactor architecture are verified. |
| Communications | G120C's Siemens automation network and commissioning tools depend on the selected variant. | For VFD500, Modbus, CANopen, PROFINET, EtherCAT or TCP is confirmed by exact card code and PLC telegram. |
| Overload and braking | G120C sizing uses load profile, cycle, overload and braking energy. | VFD500 model current, HD/ND row, braking-chopper status and resistor calculation are redone against the same mechanical cycle. |
| Migration and acceptance | STARTDRIVE/TIA parameters, telegrams and fault codes are specific to the existing project. | Parameters are not transferred automatically; I/O, scaling, direction, ramps, fault response and STO are accepted by unloaded and then loaded FAT. |
Suitable scenario
When is it worth evaluating?
- Redesignable conveyor and general-machine panels
- New pump or fan designs focused on PID and energy use
- OEM projects where the network card, including PROFINET, can be reselected
Migration gate
Before making a decision
- Record motor nameplate current, voltage, frequency and insulation class.
- Calculate normal/heavy duty, peak torque and braking cycle.
- Export the G120C order code, telegram, I/O and safety diagram.
- Confirm the VFD500 STO certificate and selected fieldbus card.
- Test direction, low-speed torque, emergency stop and fault recovery in a motor-connected FAT.
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 a G120C PROFINET project be transferred unchanged to VFD500?
No. The device file, telegram, parameter addresses, fault words and safety validation must be rebuilt.
Official manufacturer sources: Siemens SINAMICS G120C official product page · Veikong VFD500 official product page · Veikong VFD500 official user manual
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.