Product Description:

The Bosch Rexroth Indramat HLR01.1N-02K4-N28R0-A-007-NNNN is a dynamic brake resistor in the HLR Brake Resistors series. In a drive system, it converts surplus kinetic energy from the DC bus into heat so servo axes can decelerate quickly without overloading the power module. This function is especially useful during abrupt stops, rapid speed changes, and other braking events where regenerated energy rises faster than the drive can safely absorb it. When paired with compatible drive controllers, the resistor helps keep bus voltage under control and reduces the chance of unwanted energy returning to the mains. This arrangement supports drive systems that must stop high-inertia loads without forcing regenerative energy back into upstream supply hardware.

The unit can absorb a continuous braking load of 2.4 kW, which is the steady heat load it can handle during braking operation. Its resistance of 26 Ω sets the current that flows when the resistor is switched across the intermediate circuit, so it directly affects braking intensity and heat generation. Over one activation window, it can absorb 100.8 kWs of energy, and that braking interval can last up to 3.88 s before a cooling pause is needed. For intermittent operation, the permitted cumulative conduction time extends to 120 s within the operating cycle, making it suitable for repeated deceleration events on positioning and indexing axes.

The enclosure measures 120 mm in depth, 649 mm in height, and 275 mm in width, so it can be mounted on a panel or inside a cabinet with room left for airflow around the cooling surfaces. A mass of 7.9 kg adds thermal inertia, which helps slow the temperature rise during longer on-time periods. The tall, narrow housing also fits vertical cabinet layouts where component spacing and heat dissipation are important. Adequate clearance around the resistor is still necessary so heat can leave the enclosure effectively during repeated braking cycles.