Danfoss VLT Drives — FC Family Map, MCB Option Cards, LCP Panels and Coated Boards

Which VLT family fits which duty (FC-51 through FC-302), what the reference's kW, voltage band and IP class mean on a replacement, the MCB option-card system (general-purpose I/O, relay cards), LCP control panels as separate items, and why conformal-coated boards matter — grounded in the stocked range.

The FC number places the drive

A like-for-like swap needs four matches off the old unit's plate: family, kW at the duty's overload class, voltage band (the stocked rows show why — the same 30 kW AQUA exists in 380–480 V and 200–240 V builds), and enclosure (IP20 for cabinets, IP54/55 wall-mounted). The 131…/134… code on the plate pins the exact configuration including options; quote it whole. Cross-brand equivalents sit in the VFD cross-reference.

Options and spares are their own part numbers

• MCB option cards slot into the control card: MCB 101 general-purpose I/O adds digital/analog points, MCB 105 adds relay outputs — note both exist coated ("ctd") and uncoated; match what the environment already dictated.
• LCP control panels detach and replace separately — the LCP 12 with potentiometer is the numeric panel; graphic LCPs copy parameter sets between drives, which is the fastest commissioning trick in the manual.
• Replacement operator panels and doors for cabinet units are catalogue items too (AQUA door panel, form-fit).
• Coated boards ("ctd" in the reference) carry conformal coating for humid, salty or chemically loaded air — in such rooms specify coated for drive and options alike; it is the difference between five years and one.

Around 240 VLT line items are stocked — drives, option cards, panels — under Danfoss. Motor-side selection (frame, efficiency class, duty) pairs with the IEC frame chart and IE-class guide; a nameplate photo of drive and motor together gets both ends quoted in one 24-hour pass.

Frequently asked questions

Can an FC-302 replace an FC-202?

Downward, usually yes — the AutomationDrive is the superset — but the AQUA software features (pipe-fill, flow compensation) and parameter layout differ, so a straight parameter copy is not possible and commissioning is redone. Like-for-like family swaps stay simplest.

What does ctd mean in a Danfoss option card reference?

Conformal-coated circuit board — the humidity/corrosion-protected build. Coated and uncoated versions carry different part numbers; environments that justified coating once require it on every card that goes in.

Is the kW rating on a VFD the motor's kW?

It is the drive's rating at a stated overload profile — a pump duty (low overload) and a machinery duty (high overload) can land one size apart for the same motor. Match the old drive's rating and duty class, or size from the motor's full-load current.

Can I move the LCP panel from the old drive to the new one?

Yes within the platform — LCPs are deliberately detachable spares, and a graphic LCP additionally carries parameter backups across. Confirm panel compatibility when crossing families.

Why does my replacement drive trip where the old one ran?

Newer firmware defaults differ: motor data not auto-tuned, switching frequency, or ramp times. Run the motor adaptation routine and transfer the old parameter set before suspecting hardware.

Compiled by cBallast for identification and cross-reference. Part numbers, designations and trademarks belong to their respective manufacturers. Confirm ratings and dimensions against the manufacturer's current documentation and the nameplate of the installed equipment before ordering or installation.