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137N1851 Danfoss 4.0kW Three Phase iC7-Automation Variable Speed Drive
Danfoss 137N1851 iC7 Automation frequency converter with three-phase 380-500 V AC input, 9.2 A rated current, IP20 open type enclosure, Modbus TCP communication and integrated Safe Torque Off functionality.
£1,387.50
Why Choose the Danfoss 137N1851 iC7 Automation Frequency Converter?
The Danfoss 137N1851 is a high-performance iC7 Automation frequency converter designed for precise and efficient control of three-phase AC motors in demanding industrial automation applications. As part of the advanced Danfoss iC7 Automation drive series, it is engineered for machine builders, OEMs and industrial facilities that require reliable motor control, flexible communication and dependable operation.
This frequency converter provides advanced motor control functionality while supporting efficient machine performance and reduced mechanical stress. The iC7 Automation platform is designed for easy integration into modern automation systems, with built-in Ethernet connectivity, Modbus TCP communication and integrated functional safety.
With a three-phase 380–500 V AC supply and a 9.2 A current rating, the Danfoss 137N1851 is suitable for industrial motors used in conveyors, pumps, fans, packaging machinery and production systems. Its IP20 open type construction and compact panel-mounted format make it ideal for installation inside electrical control cabinets.
Key Advantages
- Advanced iC7 Automation frequency converter for industrial motor control.
- 9.2 A rated current for demanding automation applications.
- Three-phase 380–500 V AC input compatible with industrial power systems.
- Integrated Safe Torque Off (STO) safety function.
- Modbus TCP fieldbus communication for automation network integration.
- Built-in Ethernet connectivity for flexible control system communication.
- Compact IP20 open type design for cabinet installation.
- Helps improve energy efficiency, productivity and machine reliability.
Key Features
- Danfoss iC7 Automation series.
- 9.2 A rated output current.
- Three-phase 380–500 V AC input supply.
- IP20 open type enclosure.
- FA02b frame size.
- EMC category C3.
- Integrated Safe Torque Off (STO) functionality.
- Modbus TCP OS7MT fieldbus protocol enabled.
- Ethernet port with no additional protocol enabled.
- Standard I/O with digital, analogue and relay connections.
- Control Panel 2.8 OPX20 included.
- Air-cooled frequency converter design.
Reliable Motor Control for Industrial Automation
Frequency converters such as the Danfoss 137N1851 regulate motor speed by adjusting the output frequency and voltage supplied to the motor. This enables improved process control, smoother acceleration and deceleration, lower energy consumption and reduced wear on mechanical components.
The Danfoss iC7 Automation platform is designed to support modern industrial networks and control architectures. With integrated safety, flexible I/O and Ethernet-based communication, the 137N1851 provides a dependable motor control solution for advanced machine automation and production environments.
Typical Applications
- Industrial conveyors and material handling systems.
- Packaging and production machinery.
- Pumps, fans and ventilation equipment.
- Compressors and process equipment.
- Manufacturing and assembly lines.
- OEM automation systems and machine building.
- Industrial control cabinets and automation panels.
Technical Specifications
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| Power | 4 kW | |
|---|---|---|
| Current | 9.2 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| EMC Filter | Industrial | |
| Series | iC7 Automation | |
| Catalogue number | 7FC-AUFA3N05-09A2E20F3-000131285 | |
| Product type | Frequency converter | |
| Cooling method | Air cooled | |
| Input voltage | 380–500 V AC | |
| Input phases | 3-phase | |
| Rated current | 9.2 A | |
| Protection rating | IP20 / Open Type | |
| Frame size | FA02b | |
| EMC category | C3 | |
| Control panel | Control Panel 2.8 OPX20 | |
| Standard I/O | 4x DI, 2x DI/O, 2x AI, 1x AO, 2x RO | |
| Fieldbus protocol | Modbus TCP OS7MT | |
| Other protocol support | Ethernet port, no protocol | |
| Functional safety | Safe Torque Off (STO), not upgradable | |
| Mounting type | Cabinet / panel mounting |
Frequently Asked Questions
What is the Danfoss 137N1851 used for?
The Danfoss 137N1851 is used to control the speed and torque of three-phase AC motors in industrial automation, machine building and production applications.
What supply voltage does this drive require?
The drive operates from a three-phase 380–500 V AC supply.
What is the rated current of the Danfoss 137N1851?
The Danfoss 137N1851 has a rated current of 9.2 A.
Does this frequency converter include safety functionality?
Yes, it includes integrated Safe Torque Off (STO) functional safety, which is not upgradable on this model.
Which communication protocol is enabled?
The drive has Modbus TCP OS7MT fieldbus protocol enabled and includes an Ethernet port.
Trusted by Industrial Automation Professionals
Danfoss iC7 Automation frequency converters are widely used by automation engineers, machine builders and industrial maintenance teams to deliver reliable motor control, efficient operation and seamless integration into modern production systems.
