RZW02.1-003-060

The Bosch Rexroth Indramat RZW02.1-003-060 braking resistor is a fixed resistor designed for industrial automation applications within the RZW Braking Resistors series. As part of the RZW series, this unit delivers reliable energy dissipation with a 3 kW power rating and robust construction. The housing, manufactured from galvanized steel, provides protection up to IP23 protection class against dust and water ingress. Weighing only 1.2 kg, the compact resistor measures 389 mm in width, 75 mm in depth, and 87 mm in height, enabling easy integration in constrained control cabinets. Key capabilities include a high peak power absorption feature and continuous duty operation at elevated ambient temperatures.

Detailed technical specifications define the performance envelope of the RZW02.1-003-060. The minimum connectable resistance of 2.5 Ω sets the lower limit for safe operation, while the resistor type is specified as a fixed resistor in a cemented wire wound pipe configuration. Thermal management is quantified by a thermal time constant of 100 s, ensuring predictable temperature rise under load. Ventilation is provided by an axial ventilator rated 3.5 kVA at 3 AC 400 V 50 Hz for external ventilation, complemented by an air current monitoring wind vane relay to detect cooling airflow. The resistor cross-section of 68 mm² supports efficient heat transfer. Duty cycle is specified as 60% (Ed), with maximum on times of 48 s at 40% Ed and 7.2 s at 6% Ed, and corresponding off times of 72 s at 40% Ed and 112.8 s at 6% Ed for safe cooldown periods. Peak power absorption reaches 2.7 kW, ensuring transient loads are handled without system interruptions.

Operational features emphasize continuous and intermittent performance in industrial braking applications. The integrated duty cycle rating of 60% allows the resistor to remain active during most of each operating period, while specified on/off time limits protect against thermal overload. The galvanized steel housing and perforated metal cover provide structural support and facilitate airflow around the cemented wire element. Dual porcelain terminal connections housed in an attached terminal box, complete with PG screws, secure wiring and support structured cable routing. The resistor requires a minimum off-time of 48 s between high-load cycles to dissipate stored heat, ensuring long-term reliability.

System integration is streamlined for compatibility with Bosch Rexroth Indramat drive controllers and RD 500 firmware, which offers integrated monitoring of duty cycle, power dissipation, and temperature thresholds. These monitoring functions trigger protective actions when predefined limits are exceeded, safeguarding both resistor and drive electronics. The RZW02.1-003-060 is ideal for braking resistors in CNC machines, robotics, conveyor systems, and other servo-driven industrial applications where precise energy absorption and thermal stability are critical. Its compact form factor and standardized mounting parallel to assembly surfaces simplify installation and maintenance tasks.