Lenze EMB9351-E 9300-Series Braking Module

Product Overview

The EMB9351-E (EMB9351-E) is a high-performance braking module designed for seamless integration within the Lenze 9300-series drive ecosystem. Engineered for applications where rapid deceleration or controlled stopping of high-inertia loads is required, this unit provides a reliable method to dissipate regenerative energy. By converting excess mechanical energy back into heat via an integrated resistor, the EMB9351-E prevents DC-bus overvoltage trips, ensuring stability in mission-critical production lines, such as high-speed indexing machinery, vertical conveyors, and large-scale material handling systems.

Technical Configuration

The EMB9351-E is configured as a compact, built-in braking module capable of handling an input voltage range of 270 VDC to 775 VDC. It is engineered for industrial robustness, featuring a 16 A peak current capacity and a peak braking power of 12 kW. The module is designed for direct cabinet mounting and includes integrated thermal monitoring, such as temperature switch outputs, to protect the drive system from overheating during intensive braking cycles. Its design allows for parallel operation with other braking units for systems requiring higher power dissipation, making it a flexible component in complex multi-axis drive architectures.

Technical Specifications

FAQs

What is the function of the integrated temperature switch?

The potential-free NC contact on the EMB9351-E serves as a thermal safeguard. If the module reaches an excessive temperature during heavy braking, this switch opens, allowing the host drive or PLC to immediately trigger an emergency stop or ramp down the load to prevent hardware damage.

Can the EMB9351-E be used with 8200-series drives?

Yes, the braking module is compatible with both 8200-series and 9300-series drives (15 kW to 90 kW range), provided the DC-bus voltage requirements and electrical parameters align with your specific drive configuration.

How do I determine if I need a parallel connection of modules?

If your application’s peak braking energy exceeds the 12 kW threshold of a single EMB9351-E, or if the duty cycle exceeds the rated thermal capacity, you can connect multiple units in parallel to share the load.

What does the 'Phase-Out' status mean for my current operation?

The phase-out designation implies that Lenze has moved toward newer drive technologies. While the EMB9351-E remains a standard, field-proven solution for existing infrastructure, we recommend consulting with an applications engineer for long-term migration planning to newer hardware generations.

Installation Guidelines and Best Practices

• Thermal Dissipation: During operation, the module dissipates heat. Ensure a minimum vertical clearance of 100 mm above and below the unit to maintain natural convection. Do not mount the unit directly above other heat-sensitive electronics.

• DC Bus Wiring: Use short, low-inductance cables to connect the braking module to the DC-bus (+UG, -UG) terminals of the frequency inverter. The cable cross-section must be sized according to the peak current to minimize voltage drops and ohmic heating.

• Safety Precautions: Always verify that the DC-bus is completely discharged before performing any wiring changes. Use a voltmeter to confirm that the voltage at the +UG and -UG terminals is below 50 VDC before touching the connections.