Lenze EMB9352-E Brake Unit 9350 Series

EMB9352-E | Lenze 9352 Brake Module 25A

Product Introduction

The Lenze EMB9352-E belongs to the 9350 Brake Unit family. It supports a wide supply voltage range of 270 to 775 V DC. You can select from three switching thresholds: 375V, 725V, or 765V DC.

This brake unit delivers a peak current of 42 A for 60 seconds. Its maximum continuous current reaches 25 A DC. Therefore, it suits demanding stop-and-start operations.

Additionally, the EMB9352-E offers peak braking power up to 32 kW at 765V. Continuous braking power reaches 19 kW at the same voltage. These values make it a strong choice for high-inertia loads.

For lower voltage systems, the unit provides 15 kW peak at 375V DC. Continuous power at 375V is 9 kW. This flexibility allows you to match the brake to your drive’s DC bus voltage.

Technical Specifications

Supply voltage (VN): 270 … 775 V DC
Switching thresholds (Vz): 375 / 725 / 765 V DC
Peak current (60s): 42 A DC
Max. continuous current: 25 A DC

Peak braking power (PBmax) per Vz:

• 375V DC → 15 kW

• 725V DC → 30 kW

• 765V DC → 32 kW

Continuous braking power (PBd) per Vz:

• 375V DC → 9 kW

• 725V DC → 18 kW

• 765V DC → 19 kW

Smallest brake resistance (RBmin):

• 375V DC → 9 Ω ±10%

• 725V DC → 18 Ω ±10%

• 765V DC → 18 Ω ±10%

Max. energy (Wb): External resistor required. Minimum 20 minutes between braking cycles.

Power reduction:

• 40°C < T < 50°C → 2% per K

• 1000 m a.m.s.l. < h < 4000 m a.m.s.l. → 5% per 1000 m

Weight: 2.2 kg (datasheet) / 2.5 kg (package)
Dimensions: W52 x H350 x D186 mm

Mechanical and Environmental Data

The Lenze EMB9352-E has a compact vertical design. Its slim width of 52 mm saves panel space. The total height is 350 mm, and depth is 186 mm.

Moreover, this unit operates reliably under temperature derating. Between 40°C and 50°C, output power reduces by 2% per Kelvin. Above 1000 meters altitude, derating applies at 5% per 1000 meters.

You should mount this brake unit in a dry, ventilated enclosure. Keep sufficient clearance around the heatsink. Active cooling is not required, but airflow improves long-term stability.

Installation Guidelines

First, disconnect all power before installation. Verify your DC bus voltage stays within 270–775 V DC. Next, select the correct switching threshold using internal jumpers or DIP switches (refer to the Lenze manual).

Then, connect the external braking resistor to terminals RB+ and RB-. The minimum resistor value depends on your chosen threshold:

• For 375V → use ≥9 Ω

• For 725V or 765V → use ≥18 Ω

Furthermore, ensure the resistor can handle the peak and continuous power. Use shielded cables for signal wiring. Keep power and control wires separated to avoid noise.

Finally, mount the EMB9352-E vertically on a metal plate. Tighten all terminals to the recommended torque. Perform a test run at low speed before full operation.

Packaging List

• Lenze EMB9352-E brake unit ×1

• Terminal cover ×1

• Mounting screws ×4

• Quick start guide (English) ×1

Note: The braking resistor is sold separately. No certificate or warranty document is included.

Shipping

We ship worldwide via Fedex, UPS, or DHL. Tracking number provided after dispatch.

Frequently Asked Questions (FAQ)

1. Can I use the Lenze EMB9352-E with a 400V AC drive?
Yes, because 400V AC rectified gives about 560V DC. This falls inside the 270–775V DC range. You can then select the 725V or 765V switching threshold.

2. What happens if I connect a resistor smaller than RBmin?
The EMB9352-E may overheat or trigger an overcurrent fault. Always use the minimum resistance values: 9Ω for 375V, 18Ω for higher voltages.

3. How do I change the switching threshold on the 9352 brake unit?
You adjust it via internal switches. Refer to the Lenze manual for exact positions. For example, choose 375V for low DC buses or 765V for 500–600V AC drives.

4. Does this module work without an external resistor?
No. The Lenze EMB9352-E requires an external braking resistor. The internal chopper controls the resistor current. Without it, braking energy cannot dissipate.

5. How long is the lead time for this brake unit?
Stock varies. Contact us with your quantity for current availability. Typical dispatch is 1–3 business days after order confirmation.