Product Description:

The HLB01.1D-02K0-N03R4-A-007-NNNN belongs to the HLB Resistor Brake Units series manufactured by Bosch Rexroth Indramat. Installed between a drive controller and the DC bus, this unit converts regenerative motor energy into heat through an external resistor network. This action limits bus overvoltage during deceleration and helps protect connected inverters from excess returned energy. It is commonly used in conveying, packaging, and metal-forming lines where motors frequently move from driven operation into repeated braking cycles.

During cyclic duty, the module dissipates 2 kW of braking power continuously, while its short-term rating reaches 100 kW so abrupt stops can be handled without exceeding the thermal design. Logic and switching circuits operate from a control voltage of 24 VDC, and their own demand remains low at just 14 W, which keeps the auxiliary supply load modest during normal operation. The nominal resistance is 3.4 Ohm, which supports the intended balance between braking energy absorption and resistor size as current is converted into heat. A Pbd balancing factor of 0.8 helps distribute pulses across the resistor bank, reducing localized hot spots while the 820 VDC switch-on threshold brings the brake into circuit as the DC bus voltage rises.

The connected resistor can handle up to 180 kW in a single surge, giving additional margin when a high-inertia axis returns energy during an abrupt stop. Across one braking sequence, the unit absorbs 500 kWs before reaching its thermal limit, which supports multi-second emergency stopping events and other heavy deceleration demands. At power-up, an inrush current of 3 A flows for about 50 ms, and this controlled profile limits stress on upstream power supplies while helping prevent nuisance trips during startup. These operating characteristics make the unit suitable for repeated industrial braking duty where the DC bus must remain within a controlled voltage range.