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137U0721 Danfoss 4.0kW Three Phase iC7-Automation Variable Speed Drive
Danfoss 137U0721 iC7-Automation air-cooled frequency converter with 9.2 A current rating, 4.0 kW power rating, 380-500 V AC three phase operation, IP20 open type construction, PROFINET RT communication and STO safety functionality for industrial automation systems.
£1,401.75
Why Choose the Danfoss 137U0721 iC7-Automation Frequency Converter?
The Danfoss 137U0721 is a compact iC7-Automation frequency converter designed for precise motor speed control in industrial automation, machinery and OEM applications. As part of the advanced Danfoss iC7-Automation drive platform, it delivers reliable performance, flexible connectivity and efficient control for modern industrial systems.
This air-cooled frequency converter is built for cabinet-based installation where dependable motor control, industrial communication and functional safety are required. With integrated I/O, PROFINET RT communication and Safe Torque Off functionality, the 137U0721 supports seamless integration into PLC-controlled automation networks.
With a rated current of 9.2 A and a three-phase 380–500 V AC supply, the Danfoss 137U0721 is well suited for small to medium industrial motor applications. Its IP20 / Open Type construction and compact FA02b frame make it ideal for installation inside protected electrical control panels and drive cabinets.
Key Advantages
- Compact Danfoss iC7-Automation frequency converter for industrial motor control.
- 9.2 A current rating suitable for small to medium automation applications.
- 4.0 kW / 5.5 hp power rating for efficient machine operation.
- Three-phase 380–500 V AC input for industrial power systems.
- Integrated PROFINET RT OS7PR fieldbus communication.
- Functional safety with Safe Torque Off (STO).
- IP20 / Open Type cabinet-mounting format.
Key Features
- Danfoss iC7-Automation series.
- Air-cooled frequency converter.
- 9.2 A rated current.
- 4.0 kW / 5.5 hp power rating.
- Three-phase 380–500 V AC supply voltage.
- IP20 / Open Type protection rating.
- Frame size FA02b.
- EMC category C2.
- Control Panel 2.8 OPX20.
- Standard I/O: 4xDI, 2xDI/O, 2xAI, 1xAO, 2xRO.
- PROFINET RT OS7PR fieldbus protocol enabled.
- Functional safety with STO, not upgradable.
Reliable Motor Control for Industrial Automation
Frequency converters such as the Danfoss 137U0721 regulate AC motor speed by controlling output voltage and frequency. This improves process accuracy, supports energy-efficient operation and helps reduce mechanical stress on motors, pumps, fans, conveyors and driven machinery.
The iC7-Automation platform is developed for industrial applications that require flexible configuration, robust communication and dependable performance. With PROFINET RT connectivity, standard I/O and STO safety functionality, the 137U0721 is well suited to integration with PLCs and modern production systems.
Typical Applications
- Industrial conveyors and material handling systems.
- Pumps, fans and ventilation equipment.
- Packaging and production machinery.
- Process automation equipment.
- OEM machine building projects.
- Manufacturing control panels.
- Small to medium motor speed control applications.
- Industrial automation networks using PROFINET.
Technical Specifications
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| Power | 4 kW | |
|---|---|---|
| Current | 9.2 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| EMC Filter | Commercial | |
| Series | iC7-Automation | |
| Part Number | 137U0721 | |
| Model Code | IC7-60FA3N05-09A2E20F2+ACBC+ALDC+BAPR+BDBA+BEF1+BF20+CBX0+DAAU | |
| Product Type | Frequency converter | |
| Cooling Method | Air-cooled | |
| Input Voltage | 380–500 V AC | |
| Input Phase | Three-phase | |
| Current Rating | 9.2 A | |
| Power Rating | 4.0 kW / 5.5 hp | |
| Protection Rating | IP20 / Open Type | |
| Frame Size | FA02b | |
| EMC Category | C2 | |
| Control Panel | OPX20 2.8" | |
| Standard I/O | 4xDI, 2xDI/O, 2xAI, 1xAO, 2xRO | |
| Fieldbus Protocol | PROFINET RT OS7PR | |
| Additional Communication | Ethernet port, no protocol | |
| Functional Safety | Safe Torque Off (STO), not upgradable | |
| Integrated Brake Chopper | Yes | |
| DC Terminals | Yes | |
| EAN | 5715253689500 | |
| Net Weight | approx. 4.58 kg | |
| Gross Weight | approx. 5.8 kg |
Frequently Asked Questions
What is the Danfoss 137U0721 used for?
The Danfoss 137U0721 is used to control the speed and performance of three-phase AC motors in industrial automation, machinery and process control applications.
What current rating does the Danfoss 137U0721 have?
The frequency converter has a 9.2 A current rating, making it suitable for small to medium industrial motor control applications.
What power rating does this drive support?
The 137U0721 is rated at approximately 4.0 kW / 5.5 hp.
What communication protocol is included?
The drive includes PROFINET RT OS7PR fieldbus communication, along with an Ethernet port for industrial automation connectivity.
Does the Danfoss 137U0721 include safety functionality?
Yes. The drive includes Safe Torque Off (STO) functional safety, listed as not upgradable for this configuration.
Trusted for Industrial Automation Performance
Danfoss iC7-Automation frequency converters are trusted by industrial engineers, OEMs and machine builders for reliable motor control, flexible communication and efficient operation in demanding automation environments.
