DZB01.1-W720N

The Bosch Rexroth Indramat DZB01.1-W720N auxiliary bleeder is part of the DKR Drive Controllers series and supports safe and efficient energy dissipation in modern servo drive systems. Designed for seamless integration with the DKR 4.1 product group, the unit features a Nominal Voltage of 24 V DC and a maximum braking energy rating of 720 kWs. Its primary purpose is to act as a brake resistor backup, ensuring immediate system shutdown in the event of overvoltage or drive controller failure, thereby protecting sensitive inverter modules and downstream equipment.

In technical operation, the DZB01.1-W720N employs an air cooling method via a built-in blower rated at 0.22 A and 24 V DC ±20 %. The auxiliary module is configured for a rigid DC bus without an additional brake chopper (Bleeder Configuration: No bleeder/Without brake chopper), and is identified by its Design Version 1. It delivers a peak power rating of 200 kW and a continuous power rating of 3 kW, while its internal resistance of 1.8 Ω ensures stable braking characteristics. The unit is protected to an IP20 rating in accordance with IEC 529/EN 60529, guaranteeing reliable performance in controlled industrial environments.

The DZB01.1-W720N is compatible with under-grounded three-phase mains via an isolating transformer and requires an auto-transformer when input voltage does not match the rated 24 V DC. It operates safely between 5 °C and 45 °C, and can be stored or transported in temperatures ranging from –30 °C to 80 °C, highlighting its durability in varied conditions. Integration is simplified via the X7 connector, which signals bleeder status—‘Emergency bleeder working’ or ‘Emergency bleeder overload’—through an internal contact. By adhering strictly to industry standards and providing robust overvoltage protection, this bleeder ensures enhanced safety, longevity, and energy efficiency in demanding industrial drive applications.