Danfoss 137U4556 VACON NXP air-cooled frequency converter for industrial AC motor control, featuring 525-690 V AC supply, IP21 / NEMA 1 protection, integrated brake chopper and PROFIBUS DP communication.
£81,430.40
The Danfoss 137U4556 is a robust VACON NXP frequency converter designed for demanding industrial motor control applications. As part of the proven VACON NXP air-cooled drive series, it provides accurate speed and torque control for three-phase AC motors used in machinery, process control and automation systems.
This drive is engineered for applications requiring reliable performance, flexible configuration and efficient motor operation. The VACON NXP range is widely used across heavy-duty industrial environments where dependable variable speed control, system uptime and automation integration are essential.
With a 525–690 V AC supply range, IP21 / NEMA 1 enclosure format and industrial I/O capability, the Danfoss 137U4556 is suitable for panel and machinery applications where high-voltage motor control is required. Its built-in brake chopper, alphanumeric display and fieldbus-ready platform help simplify commissioning and integration into control systems.
Frequency converters such as the Danfoss 137U4556 regulate motor speed by adjusting the voltage and frequency supplied to the motor. This enables smoother operation, improved process control and reduced energy consumption compared with fixed-speed motor systems.
The VACON NXP platform is designed for demanding environments where flexibility, uptime and performance are critical. With configurable I/O, fieldbus support and robust high-voltage capability, the 137U4556 is well suited to industrial automation, process machinery and system integration projects.
| Power | 400 kW |
|---|---|
| Current | 730 A |
| Voltage | 500 V |
| Phase | Three Phase |
| IP Rating | IP21 |
| Series | VACON NXP Air Cooled |
| Product type | Frequency converter / variable frequency drive |
| Application | Industrial AC motor control |
| Input voltage | 525–690 V AC |
| DC voltage range | 640–1100 V DC |
| Input phases | 3-phase |
| Protection rating | IP21 / NEMA 1 |
| Cooling method | Air cooled |
| Display | Alpha-numeric display |
| EMC compliance | IEC 61800-3, second environment |
| Brake function | Integrated brake chopper |
| A Slot | 6DI, DO, 2AI, 1AO, +10 Vr, +24 V |
| B Slot | 2 relay outputs, NO / NC |
| C Slot | No board |
| D Slot | No board |
| E Slot | PROFIBUS DP with Sub-D9 |
| Frame size | Frame 06 |
| Manual | English |
The Danfoss 137U4556 is used to control the speed and torque of three-phase AC motors in industrial automation, process control and machinery applications.
Yes, the 137U4556 is a VACON NXP frequency converter designed for variable speed AC motor control.
The drive is designed for a 525–690 V AC three-phase supply, with a DC voltage range of 640–1100 V DC.
The Danfoss 137U4556 has an IP21 / NEMA 1 protection rating for protected indoor installations.
Yes, this configuration includes PROFIBUS DP communication with a Sub-D9 connector for integration with industrial automation systems.
Danfoss VACON NXP drives are trusted by engineers, system integrators and panel builders for reliable variable speed motor control, flexible automation integration and dependable performance in demanding industrial environments.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...