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137U5721 Danfoss 0.75kW Three Phase iC7-Automation Variable Speed Drive
Danfoss 137U5721 iC7-Automation frequency converter, an air-cooled industrial variable frequency drive with 2.4 A output current, 380-500 V AC three-phase supply, IP20 protection, PROFINET RT and integrated functional safety.
£766.50
Why Choose the Danfoss 137U5721 iC7-Automation Frequency Converter?
The Danfoss 137U5721 is a compact iC7-Automation frequency converter designed for precise control of small three-phase AC motors in industrial automation systems. As part of the advanced Danfoss iC7-Automation drive series, it delivers reliable motor regulation, flexible communication and integrated functional safety for modern machinery and control cabinet installations.
This air-cooled variable frequency drive is built for applications requiring efficient motor control, fast automation communication and dependable panel-mounted performance. With PROFINET RT connectivity, standard I/O and functional safety features including STO and SS1-t, the Danfoss 137U5721 is well suited for machine builders, system integrators and industrial automation engineers.
With a rated output current of 2.4 A and operation from a three-phase 380-500 V AC supply, the Danfoss 137U5721 is ideal for compact motor control applications such as small pumps, fans, conveyors, positioning systems and OEM machinery.
Key Advantages
- Compact frequency converter for industrial automation.
- 2.4 A rated output current for small three-phase motor applications.
- Three-phase 380-500 V AC input suitable for industrial power systems.
- IP20 / Open Type enclosure for control cabinet installation.
- Integrated Safe Torque Off (STO) and SS1-t functional safety.
- PROFINET RT fieldbus protocol enabled for industrial networking.
- Standard digital, analogue and relay I/O for flexible system integration.
Key Features
- Danfoss iC7-Automation frequency converter series.
- Air-cooled industrial drive design.
- 2.4 A rated output current.
- Three-phase 380-500 V AC supply.
- IP20 / Open Type protection rating.
- Frame size FA02b.
- EMC category C2.
- Control Panel 2.8 OPX20 included.
- Standard I/O: 4x DI, 2x DI/O, 2x AI, 1x AO and 2x RO.
- Fieldbus protocol enabled: PROFINET RT OS7PRO.
- Ethernet port connectivity.
- Integrated STO, SS1-t and fieldbus safety.
Efficient Motor Control for Compact Automation Systems
Frequency converters such as the Danfoss 137U5721 regulate motor speed by adjusting the voltage and frequency supplied to the motor. This helps improve process control, reduce energy consumption and minimise mechanical stress on motors and driven equipment.
The iC7-Automation platform is developed for engineers and machine builders who need compact drive technology with reliable communication, integrated safety and flexible configuration options for demanding production environments.
Typical Applications
- Small industrial pumps and pumping systems.
- Fans, blowers and ventilation equipment.
- Compact conveyors and material handling systems.
- Packaging and production machinery.
- Process automation equipment.
- OEM machine building applications.
- Control cabinet motor drive installations.
- Industrial automation networks using PROFINET.
Technical Specifications
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| Power | 0.75 kW | |
|---|---|---|
| Current | 2.4 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| EMC Filter | Commercial | |
| Series | iC7-Automation | |
| Part number | 137U5721 | |
| Catalogue number | 7FC-AUFA3N05-02A4E20F2-000146355 | |
| Model code | IC7-60FA3N05-02A4E20F2+ACBC+ALDC+BAPR+BDBA+BEF2+BF20+CBX0+DAAU | |
| Product type | Frequency converter / variable frequency drive | |
| Cooling method | Air-cooled | |
| Rated output current | 2.4 A | |
| Input voltage | 380-500 V AC | |
| Input phases | 3-phase | |
| Protection rating | IP20 / Open Type | |
| Frame size | FA02b | |
| EMC category | C2 | |
| Control panel | 2.8 OPX20 | |
| Standard I/O | 4x DI, 2x DI/O, 2x AI, 1x AO, 2x RO | |
| Fieldbus protocol | PROFINET RT OS7PRO | |
| Connectivity | Ethernet port, no additional protocol | |
| Functional safety | STO, SS1-t, fieldbus |
Frequently Asked Questions
What is the Danfoss 137U5721 used for?
The Danfoss 137U5721 is used to control the speed and torque of small three-phase AC motors in industrial automation, machinery and process control applications.
What current rating does this drive provide?
The drive has a rated output current of 2.4 A, making it suitable for compact motor control applications.
What supply voltage does the drive require?
The Danfoss 137U5721 operates from a three-phase 380-500 V AC supply.
Does this drive support PROFINET communication?
Yes, the drive has PROFINET RT OS7PRO fieldbus protocol enabled, along with Ethernet port connectivity.
What safety features are included?
The drive includes Safe Torque Off (STO), SS1-t and fieldbus safety functionality for safer machine operation.
Trusted by Industrial Automation Engineers
Danfoss iC7-Automation frequency converters are used in demanding industrial environments where reliable motor control, energy efficiency and seamless automation integration are essential.
