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VFD accessories: what actually needs to be added to a drive order

A frequency inverter is often not ordered alone. We may add a braking resistor, remote keypad, I/O board, EMC filter or cable right away. Not as a random add-on. Only when the load profile and the drive series require it.

The main search demand in this category is braking resistors. Our sales data says the same: customers rarely search for “options”, they ask for a resistor for a VFD. The second active block is Veichi and Delta keypads for moving control to the cabinet door.

How to choose a VFD accessory

Start with the job. If the drive stops an inertial load often, check braking resistors. If the operator must control the drive from a panel door, use a keypad. If the base terminals are not enough or the drive must talk to a controller, choose an expansion board or interface module.

Model Type Key parameter Typical use
Veichi KBD10-15 Operator panel Single-line LED keypad for AC310 When the drive is inside a cabinet and control must be on the door.
Delta KPE-LE02 Operator panel Keypad for VFD-E Replacement or remote keypad for older Delta drives.
Veichi KBD300-25 Operator panel Two-line LED display For AC300/AC310 when parameters should be visible without opening the cabinet.
Delta BR1K0W050 Braking resistor 1 kW, 50 ohm Conveyor, drum or machine with frequent stops.
Veichi AC300IO1 I/O expansion board 4 DI, 1 DO, 1 AI, 1 relay When the standard AC300/AC310 terminals are not enough for automation.

Accessory brands customers actually buy

Sales data keeps the focus on Veichi / Delta Electronics / selected Schneider Electric accessories. Veichi is mostly keypads and boards for AC300/AC310. Delta covers KPE keypads and BR braking resistors. Schneider in this category is mostly service cables and converters for Zelio.

Bosch Rexroth accessories are also in the catalog for replacement jobs on existing drives. But if the brand is not fixed by the project, we do not start with the logo. First we ask for the drive series and motor power. Then we check the stop profile and what is already installed in the cabinet.

Accessories by type: resistor, keypad, EMC, board

For faster selection, use these sections: braking resistors, operator panels for drives, braking modules, EMC filters or expansion boards. For compatibility we check the exact drive series: Veichi AC10/AC310, Delta VFD-E, Bosch Rexroth EFC/VFC.

Warranty and support

Before ordering, send us the drive article number or a nameplate photo. For a braking resistor we also need motor power and braking mode. Stop frequency matters too. For a keypad or board, the drive series matters most. We ship across Ukraine and say directly when an accessory will not fit your VFD. That is cheaper than rebuilding the cabinet after installation.

Frequently Asked Questions

How do I choose a braking resistor for a VFD?

Start with the VFD model, motor power and stopping duty. For conveyors or drums, stop frequency matters. Resistance and power should come from the manufacturer table, not from a rough guess.

When does a frequency inverter need a braking resistor?

A resistor is needed when the machine sends energy back to the DC bus: hoists, centrifuges, drums or conveyors with frequent stops. Pumps and fans with coast-down usually do not need one.

What is the difference between a braking module and a braking resistor?

The module switches braking energy into the resistor. The resistor dissipates that energy as heat. Some drives already have the braking chopper built in, so only the resistor is required; larger drives may need an external module.

Can I use a keypad from another drive series?

Do not do it without checking compatibility. Even within one brand, keypads can differ by connector, protocol and firmware. For Veichi AC310, Delta VFD-E or Bosch Rexroth, the exact series matters.

When is an EMC filter needed for a VFD?

Use an EMC filter when the drive disturbs sensors, PLCs, communication lines or when the project requires it. Select it by current, voltage and grounding scheme. It does not replace proper shielded cable practice.

Are VFD accessories compatible across brands?

Usually not. A braking resistor can sometimes be selected by electrical parameters, but keypads, I/O boards and network interfaces are tied to the brand and drive series.