Danfoss 134U7741 VLT Midi Drive FC 280 22 kW PROFINET Frequency Converter

A 22 kW Midi Drive with integrated PROFINET

134U7741 is the Danfoss VLT Midi Drive FC 280 with model code FC-280P22KT4E20H1BXCXXXSXXXXAL. It is the 22 kW (30 hp), three-phase 380-480 V drive in the K5 frame, and the AL ending of the code means the control card has integrated PROFINET. The FC 280 is Danfoss’s compact drive for asynchronous and permanent magnet synchronous motors up to 22 kW, so this order number is the top of that range. No separate option card is needed for PROFINET: the interface sits on the control cassette, and Modbus RTU over RS485 is built in as well.

Technical specifications

Decoding FC-280P22KT4E20H1BXCXXXSXXXXAL

FC-280 is the VLT Midi Drive FC 280. P22K is the 22 kW power size and T4 three-phase 380-480 V AC. E20 is IP20 chassis and H1 the integrated RFI filter. B means a brake chopper is included; the next X is no display, so the local control panel is ordered separately; C is a coated PCB. Then X (no mains option), X (adaptation A), X (adaptation B), SXXX (latest software release), X (standard language pack) and finally AL, the integrated PROFINET control card. The Design Guide lists the spare VLT Cassette control PROFINET as 132B0348.

Selecting and installing the K5 frame

The K5 frame is the largest of the five FC 280 sizes. At 12.5 kg it is a panel-mounted drive with a 16 mm2 (6 AWG) maximum cable cross-section for the 22 kW rating. Fuse and cable sizing should follow the input currents of 41.5 A and 34.6 A, and the Design Guide lists the K5 derating curve for high ambient temperature. The numerical control panel LCP 21 (132B0254) and the LCP Remote Mounting Kit 132B0102 are the matching accessories; the terminal cover for K5 is 132B0358 and the decoupling kit for K4/K5 is 132B0375. For K4 and K5 drives with the internal A1 filter, the Design Guide lists external EMC filters and the resulting cable length limits in its EMC section.

Key features of the 134U7741 configuration

• PROFINET on the control card: the drive connects directly to a PROFINET controller for start, stop, speed reference and status data, without an additional communication option module.
• Modbus RTU as standard: the RS485 port remains available, which is useful for service tools or for plants that use Modbus for secondary monitoring.
• Integrated brake chopper: with an external brake resistor, regenerated energy from decelerating high-inertia loads can be dissipated instead of tripping the drive on overvoltage.
• Coated PCB: the C designation gives the electronics extra protection against humidity and airborne contaminants.
• Safe Torque Off: dual-channel STO terminals allow the drive to form part of a machine safety circuit.
• Support for PM motors: the FC 280 controls both asynchronous and permanent magnet synchronous motors, so it can be used with high-efficiency motor designs.

Planning a PROFINET installation

Before commissioning, obtain the device description (GSDML) file for the FC 280 PROFINET control card and import it into the engineering tool of the controller. Assign each drive a unique device name, as PROFINET addressing relies on names rather than switch settings. Use industrial Ethernet cable and connectors, route network cables separately from motor cables, and earth cable shields at the drive. When several drives sit on one network, a structured layout with managed switches simplifies fault finding and keeps one failed device from interrupting the rest of the line.

Working without a display

This model code is supplied without a control panel. For a first parameter set, either add the LCP 21 numerical panel listed above or use the PC software and the communication port. In plants with many FC 280 drives, one portable panel is often kept by the maintenance team, while the drives themselves are controlled entirely through the fieldbus.

Installation and maintenance practice

• Mount the K5 drive vertically with clearance above and below for cooling air, and include the 467.5 W loss in the panel heat calculation.
• Respect the maximum motor cable lengths; longer runs require output filters and a review of EMC performance.
• Size the brake resistor using the drive’s brake data and the actual load inertia and deceleration time.
• Inspect fans and cooling surfaces periodically, check terminal tightness and keep the parameter backup up to date.

Applications in Oman and GCC conditions

At 22 kW the FC 280 is commonly used for conveyors, packaging lines, process pumps, mixers and air handling fans in factories, food plants and utilities. In GCC panels, ambient temperature inside the enclosure is usually the limiting factor, so ventilated or air-conditioned panels and the derating curve in the Design Guide should be checked together. The coated PCB helps in humid coastal sites, and IP20 drives should be installed in an enclosure that keeps out fine dust and sand.

What to include in your RFQ

• Ordering number 134U7741 or the full model code
• Motor data: power, rated current, voltage and motor type (induction or PM)
• Whether a control panel, remote mounting kit, IP21 conversion kit or brake resistor is required
• Load type, required braking and the motor cable length
• Maximum ambient temperature in the panel and the quantity needed

Documents, family and quotation

The FC 280 Design Guide MG07B302 is linked on this page. The photograph shows the FC 280 range rather than this single K5 unit. For the smaller ratings and the range overview see the Danfoss FC 280 range page and the AC drives category. Seven Star LLC is an independent supplier in Muscat. Confirm the control card variant (PROFINET), the supply voltage and the accessories with the order number 134U7741 before ordering.