SIEMENS JJY:023422620002 SINAMICS G120 Braking Resistor for Power Module FSB 375W 750W

The SIEMENS JJY:023422620002 is a robust braking resistor designed for use with SINAMICS G120 power modules, specifically the PM240-2 series. This component is crucial for applications that involve frequent acceleration and deceleration, where regenerative energy needs to be dissipated effectively to prevent over-voltage in the DC link. Its primary function is to absorb excess energy generated during braking, thereby protecting the drive system and ensuring smooth operation. The resistor is built with a high-quality aluminum housing, contributing to its durability and efficient heat dissipation. It features a 7.5 Ω resistance value and is rated for 18.5 kW peak power, making it suitable for demanding industrial applications such as cranes, hoisting gear, centrifuges, and winders. The IP21 degree of protection ensures it can withstand typical industrial environments.

Product Specifications

| Feature                      | Specification                                       |

| :--------------------------- | :-------------------------------------------------- |

| Manufacturer Part Number     | JJY:023422620002                                    |

| Brand                        | Siemens                                             |

| Product Family               | SINAMICS G120                                       |

| Compatible Power Module      | PM240-2 (FSB, FSD)                                  |

| Resistance                   | 7.5 Ω                                               |

| Peak Power (Pmax)            | 18.5 kW                                             |

| Rated Power (Pdb)            | 930 W                                               |

| Degree of Protection         | IP21                                                |

| Connection Cross-section     | 10 mm² / 8 AWG                                      |

| Connection Torque            | 0.5 Nm / 4.5 lbf in                                 |

| Weight                       | 7.0 kg                                              |

| Housing Material             | Aluminum                                            |

| Operating Temperature Range  | -10°C to +40°C (Ambient)                            |

| Storage/Transport Temp.      | -40°C to +70°C                                      |

| UL Approval                  | Required for FSD-FSF series                     |

| Integrated Temperature Switch| Yes                                             |

Core Features & Market Positioning

The SIEMENS JJY:023422620001 braking resistor stands out due to its integration within the SINAMICS G120 ecosystem, a widely recognized platform for industrial automation. Its market positioning is defined by its robust construction, high energy absorption capability, and direct compatibility with specific SINAMICS G120 power modules. Unlike generic resistors, this Siemens-branded component is tested and approved for use with the specified power modules, ensuring optimal performance and safety. The aluminum housing provides a compact and lightweight solution, facilitating easy installation within electrical cabinets. The integrated temperature switch is a critical safety feature, designed to shut down the converter in case of overheating, thus preventing potential damage and downtime. This focus on safety, reliability, and seamless integration with Siemens automation solutions positions it as a preferred choice for applications demanding precise motor control and effective braking.

Key Application Scenarios

This braking resistor is essential for dynamic applications requiring rapid deceleration and energy dissipation. It is commonly employed in industrial machinery construction where cyclic operations involve frequent braking. Typical scenarios include:

  Cranes and Hoisting Gear: Essential for safely controlling the descent of loads and preventing over-speeding.  General Machinery Construction: Used in applications like conveyors, mixers, and presses where precise stopping and holding are critical.  Centrifuges: Facilitates rapid stopping of high-speed rotating masses.  Winders: Manages the deceleration of rotating drums in textile or paper machinery.  Any application with high moment of inertia: Where regenerative energy during braking exceeds the capacity of the line supply to absorb it.

Practical System Integration Guidance

Proper integration of the SIEMENS JJY:023422620002 braking resistor with the SINAMICS G120 system is crucial for safe and efficient operation. The resistor is typically mounted horizontally or vertically onto a heat-resistant panel. Ensure adequate clearance around the unit for ventilation and to prevent heat buildup. The connection cross-section is specified as 10 mm² or 8 AWG, with a recommended torque of 0.5 Nm. It is imperative that the braking resistor is approved for the specific converter and installed according to regulations. The temperature switch integrated into the braking resistor should be connected to a digital input on the Power Module (e.g., terminal X9/4) to monitor for overheating and initiate a safe shutdown. When using the SIEMENS JJY:023422620002 with the SINAMICS G120, it is essential to configure the braking power in parameter p0219 of the drive system. Always refer to the specific documentation for your SINAMICS G120 power module and the braking resistor for detailed wiring diagrams and parameter settings.

Operation and Risk Mitigation

The SIEMENS JJY:023422620002 braking resistor operates by dissipating excess DC link energy as heat when the SINAMICS G120 drive is braking. This prevents over-voltage conditions that could damage the power module. While robust, improper installation or use can lead to significant risks. Using an unapproved or incorrectly installed braking resistor can cause fires and smoke, leading to severe personal injury or material damage. It is critical to ensure that the resistor is adequately rated for the application's power dissipation requirements. The integrated temperature switch is a vital safety mechanism; its failure to operate or incorrect integration can result in overheating. Always ensure the resistor is mounted on a heat-resistant surface with adequate ventilation and that clearances to flammable materials are maintained. Regular inspection of connections and the resistor's housing for any signs of damage or overheating is recommended. The resistor itself has a degree of protection up to IP21.

Scalability & Long-Term Value

The SIEMENS JJY:023422620002 braking resistor is designed for seamless integration with the modular SINAMICS G120 platform, offering inherent scalability. While the resistor itself is a specific component, its value is amplified by its compatibility with a range of SINAMICS G120 power modules and control units. This allows for flexible system design, where the same braking resistor can be applied across different configurations within the G120 family, reducing spare parts inventory. Furthermore, Siemens' commitment to industry standards and IIoT integration means that drives equipped with SINAMICS G120 and compatible braking resistors can be readily integrated into smart manufacturing environments. This facilitates remote monitoring, diagnostics, and predictive maintenance, contributing to the long-term operational efficiency and value of the automation system. Compatibility with broader Siemens TIA Portal engineering framework further ensures long-term support and integration capabilities.

FAQs

What is a SIEMENS JJY:023422620002 SINAMICS G120 braking resistor?

This is a specialized component designed to dissipate excess energy from the DC link of a SINAMICS G120 drive, preventing over-voltage. It is critical for applications involving frequent braking.

It effectively converts electrical energy into heat, thereby protecting the drive system from potential damage during regenerative braking cycles. The resistor ensures stable operation by managing the excess energy that cannot be fed back into the power grid.

This specific model, JJY:023422620002, is designed for compatibility with particular SINAMICS G120 Power Modules, such as the PM240-2 FSB/FSD, and has defined electrical and physical characteristics.

What are the key advantages of using the SIEMENS JJY:023422620002?

Its primary advantage is ensuring drive system protection and stable operation during regenerative braking. It offers high energy absorption capacity in a compact aluminum housing.

The resistor features an integrated temperature switch for enhanced safety, which can trigger a shutdown if overheating occurs. UL approval is often a requirement for certain series.

Integration with the SINAMICS G120 platform offers flexibility and compatibility, reducing the need for complex system integration efforts.

What are the main technical specifications for the SIEMENS JJY:023422620002?

This braking resistor has a resistance value of 7.5 Ω and a peak power rating of 18.5 kW. Its rated power is 930 W, and it has an IP21 degree of protection.

It utilizes a 10 mm² or 8 AWG connection cross-section with a specific torque requirement. The unit weighs 7.0 kg and is housed in aluminum for durability and heat dissipation.

It is designed for use with specific SINAMICS G120 Power Modules like the PM240-2 FSD, and its technical properties are validated by the manufacturer.

What applications require a braking resistor like the SIEMENS JJY:023422620002?

Applications involving loads with a high moment of inertia that require rapid braking are prime candidates. This includes cranes, hoisting gear, centrifuges, and winders.

Any industrial process that cyclically accelerates and brakes motors, generating significant regenerative energy, will benefit from this component. It prevents energy from being fed back into the line supply.

Essentially, if your drive system experiences frequent braking and the resulting energy needs to be managed to avoid DC link over-voltage, this braking resistor is essential.

How is the SIEMENS JJY:023422620002 installed?

Installation involves mounting the resistor on a heat-resistant surface with high thermal conductivity, ensuring adequate ventilation and clearances. It can be mounted vertically or horizontally.

Connections are made using the specified cross-section and torque. The integrated temperature switch must be wired to a digital input on the power module for safety monitoring.

Crucially, the braking power must be set in parameter p0219 of the SINAMICS G120 drive system after installation. Always follow the manufacturer's installation guidelines.

What are the safety considerations when using this braking resistor?

Improper installation or use can lead to fires, smoke, and severe personal injury or material damage. Always use resistors approved for the specific converter.

Ensure adequate clearance from flammable materials and proper ventilation to prevent overheating. The integrated temperature switch is a critical safety feature.

The braking resistors get hot during operation and should not be touched without proper precautions. Adhering to installation regulations is paramount.

What is the peak power and rated power of the SIEMENS JJY:023422620002?

The peak power rating for this braking resistor is 18.5 kW. This represents the maximum power it can handle during short-duration braking cycles.

The rated power, also known as continuous power, is 930 W. This is the power the resistor can continuously dissipate over an extended period.

Understanding both peak and rated power is crucial for selecting the correct resistor for applications with varying braking duty cycles.

How does the braking resistor connect to the SINAMICS G120?

The SIEMENS JJY:023422620002 connects to the SINAMICS G120 power module, typically the PM240-2 series. It requires a specific connection cross-section of 10 mm² or 8 AWG.

The connection terminals are designed for secure attachment, with a specified torque of 0.5 Nm (4.5 lbf in) to ensure reliable electrical contact.

The braking resistor is externally mounted and connected to the drive's DC link circuit through the power module's integrated brake chopper.

What is the role of the integrated temperature switch?

The integrated temperature switch acts as a safety mechanism to prevent overheating of the braking resistor. It monitors the resistor's temperature and can trigger a shutdown of the drive system if a critical limit is reached.

This switch is typically wired to a digital input on the SINAMICS G120 power module. Its function is to safeguard against thermal overload and potential damage or fire hazards.

By monitoring temperature, the switch ensures that the braking resistor operates within its safe limits, contributing to the overall reliability and safety of the automation system.

Is this braking resistor compatible with all SINAMICS G120 power modules?

No, this specific braking resistor, JJY:023422620002, is primarily designed for compatibility with certain SINAMICS G120 Power Modules, specifically the PM240-2 series, often associated with frame sizes FSD and FSE.

Compatibility should always be verified against the technical documentation for both the braking resistor and the specific SINAMICS G120 power module being used. Siemens provides detailed compatibility tables.

Using the incorrect braking resistor can lead to system malfunction, damage, or safety hazards, so confirming compatibility is a critical step in system design and maintenance.